Abstract: A welded blank assembly includes a capping material in a weld region of the assembly. The capping material can help protect a weld joint joining first and second sheet metal pieces together. At least one of the sheet metal pieces has a coating material layer that is removed prior to forming the weld joint so that the coating material does not contaminate the weld joint. The removed coating material can be collected before the weld joint is formed and reapplied as part of the capping material after the weld joint is formed, effectively changing the coating material from a potential weld contaminant to a weld joint protectant. The capping material may also include additional material from a source other than the coating material layer.

Abstract: A method of forming an injection-bonded joint may include forming a chamber wall within a bondline region between mating surfaces of a first part and a second part. The chamber wall may divide a bondline length and define at least one adhesive chamber. The method may include injecting a structural adhesive into the adhesive chamber through an injection port, and discharging excess adhesive from the adhesive chamber through a bleed hole.

Abstract: A welded structure and welding method make it possible to improve welding strength and welding quality. A welded structure in which a first member and a second member are joined by welding, wherein the first member comprises a second-member joining part which is joined to the second member, and the second member comprises a first-member joining part which is joined to the first member. If the direction in which the first member and the second member are arranged is the first direction, and the direction intersecting the first direction is the second direction, the welded structure comprises a cavity part which is provided between the first-member joining part and the second-member joining part, and a welded part which is provided between the cavity part and both end parts in the second direction of the joining surface where the first-member joining part and the second-member joining part are joined.

Abstract: A method of joining a first thermoplastic component with a second thermoplastic component includes abutting a joint surface of the first thermoplastic component against a joint surface of the second thermoplastic component. The first thermoplastic component includes a thermoplastic protrusion extending from the joint surface, and the joint surface of the second thermoplastic component defines a receiving pocket adapted to receive the thermoplastic protrusion. Abutting a joint surface of the first thermoplastic component against a joint surface of the second thermoplastic component further includes inserting the thermoplastic protrusion into the receiving pocket. Once abutted, thermal energy is applied to a heat-apply surface of the second thermoplastic component, that is opposite the joint surface. The thermal energy is sufficient to melt a portion of the thermoplastic protrusion and a portion of the joint surface of the second thermoplastic component.

Abstract: A structure is disclosed herein. The structure includes a first component including a first material, and a second component joined to the first component. The second component includes a second material that is dissimilar from the first material. A spacer is disposed between the first and second components, and the spacer eliminates galvanic corrosion of the first component at an interface between the first component and the second component. The spacer includes a first layer consisting of the first material, a second layer bonded to the first layer and consisting of a third material, and a third layer bonded to the second layer and consisting of the second material. The third material of the second layer is different from the first material and different from the second material. Also disclosed herein are a method of making the structure, and a method for reducing galvanic corrosion.

Abstract: A method for the production of a connecting structure for a motor vehicle involves inserting two profile elements, connected to one another by a plastic joint element, into a tool and hardening in the tool. A fiber semi-finished product with respective receivers for corresponding connecting regions of the profile elements is produced. The connecting regions of the profile elements are connected to the respective receivers of the fiber semi-finished product. The plastic joint element is produced by injecting plastic in a transfer molding process into a forming region of the tool provided for this purpose.

Abstract: The invention is a system based on adaptors and replacement panel design that allows replacement of a panel that is surrounded by other panels in an interlocking floor system. Since the panel to be replaced is surrounded by panels that cannot be disturbed, only vertical motion is available to allow the replacement panel to be positioned into the space. One side of the adaptors of the invention mates to the surrounding panels in a standard manner. The other side of the adaptors provides an interface that allows vertical interlocking of the new replacement panel. The replacement panel of the intervention provides interfaces along its edges that allow vertical mating with the adaptors' vertical interlocking mechanism.

Abstract: An improved method of sealing a ceramic part to a solid part made of ceramic, metal, cermet or a ceramic coated metal is provided. The improved method includes placing a bond agent comprising an Al2O3 and SiO2 based glass-ceramic material and organic binder material on adjoining surfaces of the ceramic part and the solid part. The assembly is heated to a first target temperature that removes or dissolves the organic binder material from the bond agent and the assembly is subjected to a second induction heating step at a temperature ramp rate of between about 100° C. and 200° C. per minute to temperatures where the glass-ceramic material flows and wets the interface between adjoining surfaces. The assembly is rapidly cooled at a cooling rate of about 140° C. per minute or more to induce nucleation and re-crystallization of the glass-ceramic material to form a dense, durable and gas-tight seal.

Abstract: An axle mount for a brake system component of an axle/suspension system includes a weld disposed on and between the axle of the axle/suspension system and a brake system component. The weld secures the brake system component to the axle of the axle/suspension system to form a bracket-to-axle connection. The connection includes a peened portion that is formed by working the surface of the connection by mechanical means. The peened portion of the connection exhibits residual compressive stresses that increase the durability of the brake bracket-to-axle connection and also the durability of the axle itself.

Abstract: A fatigue load resistant structure includes a fatigue loaded portion and a weldable fatigue loading resistant feature. The fatigue loaded portion includes a first elongation material. The weldable fatigue loading resistant feature includes a second elongation material secured to the fatigue loaded portion of the fatigue loaded structure. The first elongation material is less ductile than the second elongation material, and the weldable fatigue loading resistant feature can reduce, retard, or eliminate formation of cracks due to tensile and compressive forces.

Abstract: The present invention relates to an extension recycling method by the technology of bar embedment with glue for wood columns and an apparatus thereof, the method comprising: classification of short wood, sawing of short wood, drying of short wood, assembling and sorting of short wood, connection in series of short wood under pressure, processing of short wood, and marking of stand columns. The apparatus is a short wood connection machine comprising a main body, rotating rollers, pressing cylinders, pressing plates and a planing frame. By using the present method, short wood can be connected into a strut, so that the abandoned short wood can be recycled to save natural resources. Due to the apparatus and the connecting member of the present invention, the process of connecting short wood into a strut can be completed conveniently, which have the advantages of simple structure, convenient processing and easy manufacturing.

Abstract: A device for the laser transmission welding of two plastic assembly parts is provided, wherein at least one of the plastic assembly parts contains an absorber for laser light, comprising a processing head with a processing side, with a processing-side discharge shaft for at least one laser beam and with a laser-transparent pressing means for pressing together the plastic assembly parts, wherein the laser-transparent pressing means is guided decoupled from the processing head in the discharge shaft. Furthermore, a method for producing a welded joint between two plastic assembly parts by laser transmission welding is specified.

Abstract: A frictional weld joint couples first and second body portions of an article together. The frictional weld joint comprises a first bead extending from the first body portion of the article and a second bead extending from the second body portion of the article. The second bead has an interior stem and an exterior stem space from the interior stem defining a cavity therebetween. The first and second beads are placed in contact with each other with the centerline of the second bead offset from the centerline of the first bead. A force is applied to either the first or second body portions to generate friction between the first and second beads to plastically displace the first and second beads. The force is removed for fusing the first and second beads together to couple together the first and the second body portions of the article.

Abstract: Fibers in a fiber reinforced resin laminate are exposed by placing a gel in contact with the resin laminate, forcing the fibers of the resin laminate into the gel, and using the gel to displace the resin surrounding the fibers being forced into the gel. The gel is removed to expose the fibers.

Abstract: The present application relates to a friction stir welding tool (20) for joining two adjacent work pieces (10), which work pieces comprise portions (6) to be welded and having a narrow space there between on one side, said tool having an axis of rotation, and comprising a first shoulder (1), a second shoulder (2), and a pin (3) arranged so as to connect the first and second shoulders, wherein said first shoulder has a first contact surface for friction heat generation to the work pieces to be joined during welding, said first contact surface having a first contact area, and said second shoulder has a second contact surface for friction heat generation to an opposite surface (5) of the same portions of the work pieces to be joined, said second contact surface having a second contact area, the first and second areas having different sizes, where the first area is a larger sized area than the second area.

Abstract: A cast structural connector connects a structural member, such as a hollow structural section (HSS) or wide flange (W) section member, to a structural frame. The connector is particularly suited for lateral bracing and includes a first end configured to receive the structural member and be welded to the structural member, a second end for connecting to the structural frame, and an intermediate portion. The first end includes beveling allowing compatibility with structural members of varying sizes and enabling complete joint penetration welding thereby developing the full axial strength of the structural member. The intermediate portion provides for transmission of forces as the frame deforms, for example, under severe seismic conditions, and can include a flexural plastic hinge portion. The connector can be welded to the structural frame or connected by a standard fabricated end connection, such as a gusset plate. Casting manufacturing allows for mass production of the connector.

Abstract: A device (1) for automated connection of two components (25, 27) in joint region (29) is proposed. The device (1) has a rotating winding device, especially a circle-segment-like rotor (3), which is arranged to guide a cloth tape (23) along winding paths (26) and to create a wound joint connection in the joint region (29).

Abstract: A bicycle having a first tube with a first tube portion and a first weld portion. The first tube portion has a first tube portion thickness and the first weld portion has a first weld portion thickness. The first weld portion has a first mating surface. A second tube having a second tube portion and a second weld portion. The second tube portion has a second tube portion thickness and the second weld portion has a second weld portion thickness. The second weld portion has a second mating surface. The first mating surface is positioned adjacent to the second mating surface, forming a weld interface between the first tube and the second tube. A weld bead formed along the weld interface coupling the first weld portion and the second weld portion.

Abstract: A method and apparatus for bonding a first substrate to a second substrate can include an intermediate layer disposed between the substrates. In one embodiment, the intermediate layer can be disposed to a bonding area of the first substrate and only one adhesive layer can be disposed between the intermediate layer and the second substrate. In other embodiments, a plurality of intermediate layers can be used.

Abstract: An automobile frame component includes a closed section constituted by welding a flange portion to a panel part, wherein when a welding position coordinate is represented in a coordinate system in which an end of a contact position between the flange portion and the panel part is assumed as 0, and a flange outer end side of the flange portion is assumed as negative (?) whereas a vertical wall side is assumed as positive (+), and when a radius of a circular arc-like portion connecting a vertical wall portion and the flange portion in the substantially hat-like shape is denoted as R (mm), and a weldable gap amount is denoted as a (mm), a welding position X represented by the following formula is continuously welded using a one-side welding method: +?(2Ra?a2)?X>1.5 where R?2.

Abstract: What is proposed is a weld-on element which has a weld-on end and a functional region arranged at a distance from the latter and in which a body which is designed as a welding stud is arranged between the weld-on end and the functional region.

Abstract: A metal member 1 and a resin member 2 are brought into contact with each other without interposing a resin layer between the metal member 1 and the resin member 2. A rotation tool 10, which is being rotated, is pressed against the surface 1a of the metal member 1 in an inclined state so that the inclination angle ? of the axis Q of the rotation tool 10 relative to the normal line P of the surface 1a of the metal member 1 satisfies the condition of 0°<??5°. This applies friction energy to the metal member 1 to join the metal member 1 and the resin member 2.

Abstract: A mounting plate utilized to attach an object to a mounting system. The mounting plate includes a base having a top surface and a bottom surface. The bottom surface of the base is bonded to a membrane of the mounting system. A housing is raised from the top surface of the base, the housing creates a contact surface area to support the object. A first member is raised from the top surface; the first member has a surface at a height flush with the contact surface area of the housing. A hole extends through the thickness of the housing.

Abstract: A heating process makes a temperature of joining surfaces Wa and Ta of a pair of metal parts W and T at the start of a first joining process equal to 20% or greater, preferably, 40% or greater of a melting point of material of the metal parts W and T. The heating process makes a heating depth h of the pair of metal parts W and T at the start of the first joining process equal to 1.0 mm or greater.

Abstract: A butt-welded joint includes a pair of steel plates, a first weld metal that is formed at a butting portion of the pair of steel plates from a side of a first surface of the butt-welded joint to a side of a second surface opposite the first surface by irradiation of a first high-energy density beam from the side of the first surface, and a second weld metal that is formed by irradiation of a second high-energy density beam to cover an end surface of the first weld metal at the side of the first surface side of the first weld metal. A width W1 of the first weld metal on the first surface and a width W2 of the second weld metal on the first surface satisfy an equation 1.2?W2/W1?3.5, and a depth of the second weld metal from the first surface is 2.0 mm to 10.0 mm.

Abstract: A system and method to attach an object to a support structure. The system includes an object attached to an elastic membrane. The elastic membrane includes a lower surface having a first and a second surface area. The first surface area extends peripherally along at least a portion of the lower surface and the second surface area is at least partially enclosed within the first surface area and separable from the support structure. The system further includes an absorbent material attached to the first surface area and an adhesive applied to a top surface of the support structure. The absorbent material being adapted to bond with at least a portion of the adhesive.

Abstract: A connector and a method of anchoring the connector to a first object that includes providing the connector having a sleeve element and a piston element with a shaft portion, providing a through hole in the first object, and inserting the connector through the through hole and until a distal portion of one of the sleeve and/or the piston element rests against the second object. Mechanical oscillations are coupled into the piston element while the piston element is pressed towards the distal side, and thereby liquefying portions a thermoplastic material at an interface portion between the sleeve element and the piston element while a periphery of the interface portion is adjacent the circumferential wall, and causing the liquefied thermoplastic material to flow radially outward from the periphery and into structures of the first object and/or along an inner surface.

Abstract: A method for making a temporary connection between two parts (10, 12), comprising the following successive steps: placing a connecting element (40, 40?) into an operating position wherein said connecting element surrounds the assembly formed by said parts and is subjected to an internal deformation strain; locking the position of said connecting element by stress-keeping means (52?) with controlled relief; connecting said connecting element (40, 40?) to each part (10, 12) by attaching means (36, 38); and wherein said internal deformation stress is at a sufficient level to enable the connecting element (40, 40?) to be unsecured from said parts (10, 12) by extending to a rest position, during a release control of said stress-keeping means (52?).

Abstract: An adhesion flange structure includes: a first flange extending along and farmed to an end portion of a first vehicle body panel with an interposing bend portion; a second flange formed to an end portion of a second vehicle body panel configuring a section of a vehicle body together with the first vehicle body panel, the second flange formed facing the bend portion and the first flange; an adhesive that adheres the bend portion and the first flange to the second flange; a ridge projection portion formed extending along the direction the first flange extends along the end portion of the first vehicle body panel, and formed to at least one portion out of the bend portion and a facing portion of the second flange that faces the bend portion, the ridge projection portion forming a projection towards the opposing side out of the bend portion and the facing portion.

Abstract: A splice sleeve having an elliptical or compound curve cross section for connecting overlapping end portions of reinforcing bars utilized in various types of structures in which steel reinforcing bars are utilized and it is desired to connect the overlapping end portions of the reinforcing bars. The splice sleeve is configured to receive the overlapped end portions of the reinforcing bars and then be filled with hardenable material to resist axial tension and compression exerted on the reinforcing bars. In one embodiment, both ends of the sleeve are provided with an inwardly directed lip to increase the splicing capacity of the sleeve and also to serve as a guide to position the rebars to a minimum of about 3 mm from the inside wall surface of the sleeve.

Abstract: A system includes a unit of a first part, and a proximal portion through an intermediate portion extended by a distal portion including a first extremity surface. A second part with a second portion includes a second surface to be friction welded with the extremity surface. A second portion is bordered laterally by a lateral surface and has a proximal portion, which extends through an intermediate portion extended by a distal portion. The distal portion of the second portion is carried in a malleable state during a friction welding. The intermediate portion of the second portion flares from the distal portion by the second towards and till the proximal portion of the second portion such that the bead of material from the deformation of the distal portion of the second portion during welding rubs against the lateral surface of the intermediate portion of the second portion during welding.

Abstract: A support structure component is provided for a motor vehicle body and to a correspondingly configured motor vehicle body. The support structure component includes, but is not limited to a support element and a plastic fastening structure arranged thereon, which includes, but is not limited to a fastening element for fastening a motor vehicle component.

Abstract: In a panel joint structure, a first joint portion and first load transfer portions are formed on an end portion of a first panel, and a second joint portion and second load transfer portions are formed on an end portion of a second panel. A first joint surface of the first joint portion and a second joint surface of the second joint portion are welded and adhered to each other, and first load transfer surfaces of the first load transfer portions and second load transfer surfaces of the second load transfer portions are adhered to each other. The first load transfer surfaces are contained in the range of the plate thickness of a first panel body portion, and the second load transfer surfaces are contained in the range of the plate thickness of a second panel body portion.

Abstract: A joining element to be anchored in an object with the aid of a thermoplastic material and mechanical vibration includes a proximal end and a distal end that are spaced from one another along an axis of the joining element. A contact face is in the area of the proximal end, the contact face being suitable for being contacted with a vibrating tool for applying, to the joining element, mechanical vibration and a force parallel to the axis. The wall anchoring portion is situated between the proximal end and the distal end, and has a circumferential surface being equipped with a plurality of recesses and radially protruding energy concentrating elements between the recesses. A tubular portion is situated between the proximal end and the distal end and extends distally from the wall anchoring portion.

Abstract: A welded blank assembly is formed by welding edge regions of separate sheet metal pieces together at a weld joint. One or more of the sheet metal pieces includes a coating material layer and a weld notch, where at least some of the coating material layer is removed from the edge region(s) prior to welding so that the weld joint is substantially free from constituents of the coating material layer. An additional material may be added to a weld pool during weld joint formation to influence the size, shape and/or composition of the resulting weld joint to help compensate for the presence of the weld notch.

Abstract: A plastic unit to be assembled by welding includes first and second members, and an interconnecting member for interconnecting the first and second members. The first member extends in an axial direction. The second member caps the first member, and is in contact with the first member at a first junction extending in the axial direction and terminating at opposite first and second ends, a second junction adjacent to the first end and extending in an inward direction, and a third junction adjacent to the first end and extending in an inward direction. The interconnecting member includes first, second and third interconnecting portions disposed at the first, second and third junctions, respectively.

Abstract: A forged steel for components for nuclear power plants meets a specific chemical composition. The grain size number of a metal structure thereof is 4.5 to 7.0 in terms of ASTM grain size number. It is preferred that the content of N is 0.0100 mass % or more when the mass ratio (Al/N) of the content of Al to the content of N is 1.93 or more, and that the content of Al is 0.022 mass % or more when the mass ratio (Al/N) of the content of Al to the content of N is less than 1.93. The forged steel for components for nuclear power plants exhibits excellent strength, toughness and hydrogen cracking resistance even after being subjected to a stress relief heat treatment subsequent to welding.

Abstract: A welding method and apparatus that simultaneously utilize laser beams and arc welding techniques. The welding apparatus generates a first laser beam that is projected onto a joint region between at least two workpieces to produce a first laser beam projection on adjacent surfaces of the workpieces and to cause the first laser beam projection to travel along the joint region and penetrate the joint region. The apparatus also generates an electric arc to produce an arc projection that encompasses the first laser beam projection and travels therewith along the joint region to form a molten weld pool. In addition, the apparatus generates a pair of lateral laser beams that produce lateral laser beams projections that are encompassed by the arc projection and are spaced laterally apart from the joint region to interact with portions of the weld pool that solidify to define weld toes of the weld joint.

Abstract: In an arrangement for transmitting power or data through a solid rigid substrate without penetrating the substrate, acoustic transducer components are mounted on the substrate by means of strain isolator elements which are welded or otherwise bonded to the substrate and providing an attachment surface to which the attachment interface of the acoustic transducer may be attached. The strain isolator element is of the same or similar acoustic impedance as the rigid substrate and may indeed be formed of the same material. Various geometries of strain isolator are disclosed, including one comprising a stalk attached to the solid rigid substrate and topped by a disc in a ‘mushroom’ configuration.

Abstract: There is provided a joint body including: a reinforcing member having at least one random layer in which a chopped carbon fiber is randomly oriented in a thermoplastic resin, and at least one unidirectional material layer in which a continuous carbon fiber is unidirectionally arranged in a thermoplastic resin; and a reinforced member with an open sectional shape having at least one selected from the group consisting of a random layer and a unidirectional material layer, wherein the reinforcing member and the reinforced member are vibration-welded to form a hollow closed section.

Abstract: The present invention is a refuse truck lift arm with sections that are bolted, not welded, together. Where the sections are joined together there is a recess and key arrangement. The key is seated in the recess of each half and straddles the inner face that divides them. In this way, shear forces that would otherwise be entirely borne by the bolts are also placed on the key. Each of the three sections, called “weldments,” are welded together in a novel way. The welding placement and sequence reduces welding distortion. Two C-shaped steel pieces are used for each straight section of each weldment. First, interior reinforcing brackets are welded into each C-section. Next, the two C-shaped sections are welded together, with the weld being between the edges that will form the thin side of the arm.

Abstract: An anchoring method of anchoring an anchoring element in a construction object is provided, where a surface of which object has at least one of pores in a surface, structures in a surface (such as an arrangement of ridges with undercut), a inhomogeneous characteristic with makes the penetration of a surface by a liquid under pressure possible, thereby creating pores filed by the liquid underneath the surface, and of a cavity. The method includes the steps of: providing a first element and a second element, the first element comprising a thermoplastic material; positioning the first element in a vicinity of said surface and/or of said cavity, respectively, and positioning the second element in contact with the first element; and causing a third element to vibrate while loading the first element with a force, thereby applying mechanical vibrations to the first element, and simultaneously loading the first element with a counter-force by the second element.

Abstract: The invention relates to a starter material for a sintering compound, said starter material comprising particles which at least proportionally contain an organic metal compound and/or a precious metal oxide, the organic metal compound and/or the precious metal oxide being converted during heat treatment of the starter material into the elemental metal and/or precious metal. The invention is characterized in that the particles have a coating containing a reducing agent by means of which the organic metal compound and/or precious metal oxide is reduced to the elemental metal and/or precious metal at a temperature below the sintering temperature of the elemental metal and/or precious metal.

Abstract: Weld deposit compositions with improved crack resistance, improved wear resistance, and improved hardness are provided by controlling matrix grain size and balancing Titanium and/or Niobium with Carbon and/or Boron content. Additionally, the presence of coarse chromium carbides is drastically decreased to reduce the amount of check-cracking. Preferably, the weld deposit is produced from a flux-cored or metal-cored wire. The weld deposit characteristics include a matrix having a fine grain size, small evenly dispersed carbides within the matrix, and a small amount of Carbon in the matrix.

Abstract: The present invention relates to two-component polyurethane compositions which on the one hand have a long open time and, even after extended exposure to a climate with high atmospheric humidity (e.g., 70% relative humidity), even after 40 minutes and in particular even after 60 minutes, can still be glued and cured to form polymers having high mechanical strength. The composition comprises castor oil, at least one polyol having 5-8 hydroxyl groups, a mixture of two different polyether alcohols and/or polyester polyols on the basis of castor oil or soybean oil and at least one polyisocyanate. The two-component polyurethane compositions are suitable in particular for non-positive filling joints or gaps that are joined by large-surface area structural gluing, in particular of vane half shells of rotor blades for wind power plants.

Abstract: A method for welding uniaxially oriented renewable raw materials is disclosed. A strap produced according to the method is also disclosed.

Abstract: A weld deposit produced from a coated welding electrode for use in welding cast irons is provided by the present invention. Preferably, in one form of the present invention, the weld deposit composition comprises between approximately 54% and approximately 60% Nickel, between approximately 3.5% and approximately 5.5% Manganese, and between approximately 0.9% and approximately 1.4% Carbon. The weld deposit is preferably formed by using a coated welding electrode having a coating composition between approximately 0.3% and approximately 4.0% Magnesium and rare earth metals and oxides. The resulting weld deposit exhibits improved ductility, fracture toughness, and resistance to cracking.

Abstract: The glass-ceramic joining material, which is suitable for bonding or joining at low processing temperatures, especially less than 800° C., is composed of a BaO—SiO2—CaO—B2O3—Al2O3 system and has a coefficient of thermal expansion ?(20-300)?9.5·10?6 K?1.

Abstract: A composite structure fabricated by thermoplastic welding, and a method for producing such structures. First and second composite parts are provided, having first and second surfaces, respectively, that define an interface where the parts are to be joined. The parts include a thermoplastic matrix. An insert is provided, which includes a film portion, which may include the same thermoplastic matrix. The insert is provided with an electric resistance heating element. The first and second parts are urged together using low fusion pressure while the insert is heated using the electric resistance heating element. After a selected period of time, the electrical supply to the resistance heating element is turned off. A high fusion pressure is then applied to urge the parts together. The weldment joint is allowed to cool. After cooling, excess material may be removed, to form a composite structure.

Abstract: An electron-beam welded joint including, by mass %, C: 0.02% to 0.1%, Si: 0.03% to 0.30%, Mn: 1.5% to 2.5%, Ti: 0.005 to 0.015%, N: 0.0020 to 0.0060%, O: 0.0010% to 0.0035%, Nb: 0% to 0.020%, V: 0% to 0.030%, Cr: 0% to 0.50%, Mo: 0% to 0.50%, Cu: 0% to 0.25%, Ni: 0% to 0.50%, B: 0% to 0.0030%, S: limited to 0.010% or less, P: limited to 0.015% or less, Al: limited to 0.004% or less, and a balance consisting of iron and unavoidable impurities, wherein an index value CeEB is 0.49% to 0.60%, a number of oxides having an equivalent circle diameter of 1.0 ?m or more is 20 pieces/mm2 or less, and a number of oxides having an equivalent circle diameter of 0.05 ?m or more and less than 0.5 ?m is 1×103 pieces/mm2 to 1×105 pieces/mm2 at a thickness center portion.