Abstract: A high-strength stainless steel seamless pipe for oil country tubular goods has a composition that contains, in mass %, C: 0.012 to 0.05%, Si: 0.05 to 0.50%, Mn: 0.04 to 1.80%, P: 0.030% or less, S: 0.005% or less, Cr: 11.0 to 14.0%, Ni: 0.5 to 6.5%, Mo: 0.5 to 3.0%, Al: 0.005 to 0.10%, V: 0.005 to 0.20%, Co: 0.01 to 0.3%, N: 0.002 to 0.15%, O: 0.010% or less, and Ti: 0.001 to 0.20%, and in which Cr, Ni, Mo, Cu, C, Si, Mn, N, and Ti satisfy predetermined relations, and the balance is Fe and incidental impurities, the high-strength stainless steel seamless pipe having a steel microstructure with 6 to 20% retained austenite in terms of a volume percentage, a yield strength of 758 MPa or more, and an absorption energy vE?60 at ?60° C. of 70 J or more.

Abstract: A light reflecting body includes a base containing a resin material and a calcium carbonate and includes a metal layer on the surface of the base. The resin material is selected from a polyester resin composition, a polyarylate resin composition, and a mixed resin composition thereof. The calcium carbonate has a BET specific surface area of 1 to 15 m2/g, a pore distribution curve determined by mercury porosimetry that the top of a peak representing interparticle void size is in a pore size range of 0.1 to 1.0 ?m, a particle size distribution determined by using an electron microscope that the proportion of particles having a particle size of 0.1 ?m or less is 10% or less of the calcium carbonate, and the residue on a sieve having a mesh size of 45 ?m after wet sieving of the calcium carbonate is 0.1% or less.

Abstract: To produce a calcium carbonate in a controlled form while carbon dioxide gas is efficiently used. A method for producing a calcium carbonate comprises a carbon dioxide gas absorption step of allowing an aqueous sodium hydroxide solution at a concentration of 5 to 21% to absorb carbon dioxide gas to give an aqueous sodium carbonate solution at a concentration of 4 to 24%; a hydration step of reacting calcium oxide with an aqueous sodium hydroxide solution at a concentration of 0 to less than 6% to give a lime milk that is a suspension of calcium hydroxide having a BET specific surface area of 5 to 40 m2/g; and a carbonation step of adding the aqueous sodium carbonate solution to the lime milk and performing reaction.

Abstract: Provided is a surface-treated calcium carbonate that can make a vinyl chloride-based resin composition less colorable in a weathering test and excellent in impact strength. The surface-treated calcium carbonate is a calcium carbonate subjected to treatment with a surface treatment agent in which a proportion of saturated fatty acid contained in a fatty acid is 85% by mass or more, and has a content of elemental iron of 0.01% by mass or less, a content of elemental zinc of 0.1 to 2% by mass introduced by the treatment with the surface treatment agent, and a BET specific surface area of 5 to 30 m2/g.

Abstract: A duplex stainless steel having excellent carbon dioxide corrosion resistance, excellent sulfide stress corrosion cracking resistance, and excellent sulfide stress cracking resistance. The duplex stainless steel comprises, by mass %, C: 0.03% or less, Si: 1.0% or less, Mn: 0.10 to 1.5%, P: 0.030% or less, S: 0.005% or less, Cr: 20.0 to 30.0%, Ni: 5.0 to 10.0%, Mo: 2.0 to 5.0%, Cu: 2.0 to 6.0%, N: less than 0.07%, at least one selected from Al: 0.05 to 1.0%, Ti: 0.02 to 1.0%, and Nb: 0.02 to 1.0%, and the balance being Fe and unavoidable impurities, and has a structure that is 20 to 70% austenite phase, and 30 to 80% ferrite phase in terms of a volume fraction.

Abstract: A high-strength stainless steel seamless pipe for oil country tubular goods has a composition that comprises, in mass%, C : 0.002 to 0.05%, Si: 0.05 to 0.50%, Mn: 0.04 to 1.80%, P: 0.030% or less, S: 0.002% or less, Cr: more than 14.0% and 17.0% or less, Ni: 4.0 to 8.0%, Mo: 1.5 to 3.0%, Al: 0.005 to 0.10%, V : 0.005 to 0.20%, Co: 0.01 to 1.0%, N : 0.002 to 0.15%, and O: 0.006% or less, and that satisfies the predetermined formulae, and in which the balance is Fe and incidental impurities, the high-strength stainless steel seamless pipe having a microstructure containing prior austenite having an average grain size of 40 µm or less, the high-strength stainless steel seamless pipe having a yield strength of 758 MPa or more.

Abstract: Provided herein is a stainless steel seamless pipe for oil country tubular goods. A method for manufacturing such a stainless steel seamless pipe is also provided. The stainless steel seamless pipe has: a composition that contains, in mass %, C: 0.10% or less, Si: 0.5% or less, Mn: 0.05 to 0.50%, P: 0.030% or less, S: 0.005% or less, O: 0.0040% or less, Ni: 3.0 to 8.0%, Cr: 10.0 to 14.0%, Mo: 0.5 to 2.8%, Al: 0.1% or less, V: 0.005 to 0.2%, N: 0.10% or less, Cu: 0.01 to 1.0%, Co: 0.01 to 1.0%, and Ca: 0.0005 to 0.0030%, and in which the balance is Fe and incidental impurities; a microstructure containing at most 20 non-metallic inclusions having a predetermined composition ratio of CaO and Al2O3 and a major axis of 5 ?m or more per 100 mm2; and a yield stress of 655 MPa or more.

Abstract: To provide a high-strength seamless stainless steel pipe for oil well that has high strength, is excellent in hot workability, has excellent carbon dioxide gas corrosion resistance, and is excellent in SSC resistance under a low temperature environment. A high-strength seamless stainless steel pipe for oil well having a composition containing the particular components, the balance being Fe and unavoidable impurities, and satisfying certain expressions, having a number density of an inclusion having a major axis of 5 ?m or more and 0.5<Ti/(Ti+Al+Mg+Ca)<1.0 of 0.5 per mm2 or more and 3 per mm2 or less, and having a yield strength of 655 MPa or more, wherein in 0.5<Ti/(Ti+Al+Mg+Ca)<1.0, Ti, Al, Mg, and Ca represent the contents (% by mass) of the elements in the inclusion, and an element that is not contained is designated as 0.

Abstract: Provided herein is a dual-phase stainless steel having excellent carbon dioxide corrosion resistance, excellent sulfide stress corrosion cracking resistance, and excellent sulfide stress cracking resistance. The dual-phase stainless steel contains, in mass %, C: 0.03% or less, Si: 1.0% or less, Mn: 0.10 to 1.5%, P: 0.030% or less, S: 0.005% or less, Cr: 20.0 to 30.0%, Ni: 5.0 to 10.0%, Mo: 2.0 to 5.0%, Cu: 2.0 to 6.0%, N: less than 0.07%, and the balance Fe and unavoidable impurities, and has a structure that is 20 to 70% austenite phase, and 30 to 80% ferrite phase in terms of a volume fraction.

Abstract: The present invention relates to a resin composition containing: 100 parts by weight of a polypropylene resin; 0.2 parts by weight to 2 parts by weight of an olefinic elastomer; 2 parts by weight to 5 parts by weight of a talc having an aspect ratio in a range of 35 to 60; 2 parts by weight to 5 parts by weight of a fibrous magnesium sulfate having an average fiber diameter of 0.1 ?m to 2 ?m and an average fiber length of 8 ?m to 30 ?m; and 0.01 parts by weight to 1 part by weight of a metallic soap that is at least one selected from the group consisting of a magnesium salt of a fatty acid and an aluminum salt of a fatty acid.

Abstract: A high strength stainless steel seamless pipe for oil country tubular goods which is excellent in hot workability, has a high strength, suppresses scattering in the strength, and has excellent carbon dioxide corrosion resistance. The steel pipe has a yield strength of 655 MPa or more, and a chemical composition comprising, by mass %, C: 0.005 to 0.05%, Si: 0.05 to 0.50%, Mn: 0.20 to 1.80%, P: 0.030% or less, S: 0.005% or less, Cr: 12.0 to 17.0%, Ni: 4.0 to 7.0%, Mo: 0.5 to 3.0%, Al: 0.005 to 0.10%, V: 0.005 to 0.20%, Co: 0.01 to 1.0%, N: 0.005 to 0.15%, and O: 0.010% or less with the balance being Fe and inevitable impurities. Cr, Ni, Mo, Cu, and C satisfy a specified expression, and Cr, Mo, Si, C, Mn, Ni, Cu, and N satisfy another specified expression.

Abstract: The invention is intended to provide a duplex stainless steel and a method for manufacturing same. A duplex stainless steel pipe is also provided. A duplex stainless steel of the present invention has a specific composition, and has a microstructure containing an austenitic phase and a ferrite phase. The duplex stainless steel satisfies the following contents for C, Si, Mn, Cr, Mo, Ni, N, Cu, and W in the formula (1) below, and has a yield strength YS of 655 MPa or more, and an absorption energy vE?10 of 40 J or more as measured by a Charpy impact test at a test temperature of ?10° C. 0.55[% C]?0.056[% Si]+0.018[% Mn]?0.020[% Cr]?0.087[% Mo]+0.16[% Ni]+0.28[% N]?0.506[% Cu]?0.035[% W]+[% Cu*F]?0.

Abstract: Provided is a surface-treated calcium carbonate that can make a vinyl chloride-based resin composition less colorable in a weathering test and excellent in impact strength. The surface-treated calcium carbonate is a calcium carbonate subjected to treatment with a surface treatment agent in which a proportion of saturated fatty acid contained in a fatty acid is 85% by mass or more, and has a content of elemental iron of 0.01% by mass or less, a content of elemental zinc of 0.1 to 2% by mass introduced by the treatment with the surface treatment agent, and a BET specific surface area of 5 to 30 m2/g.

Abstract: Provided is a white resin composition that can maintain a high degree of whiteness even after undergoing a thermal resistance test. A white resin composition contains: a white pigment; a surface-treated calcium carbonate in which particle surfaces of a synthetic calcium carbonate with an average particle diameter of 0.05 to 1 ?m are subjected to surface treatment with a condensed phosphoric acid and an organic modified silicone oil; and a resin, wherein a content ratio between the white pigment and the surface-treated calcium carbonate is, in mass ratio (white pigment to surface-treated calcium carbonate), within a range of 90:10 to 60:40, and a total content of the white pigment and the surface-treated calcium carbonate in the resin composition is within a range of 5 to 70% mass.

Abstract: Provided herein is a high-strength stainless steel seamless pipe for oil country tubular goods. The high-strength stainless steel seamless pipe having a yield strength of 862 MPa or more contains, in mass %, C:0.05% or less, Si: 0.5% or less, Mn: 0.15 to 1.0%, P: 0.030% or less, S: 0.005% or less, Cr: 14.5 to 17.5%, Ni: 3.0 to 6.0%, Mo: 2.7 to 5.0%, Cu: 0.3 to 4.0%, W: 0.1 to 2.5%, V: 0.02 to 0.20%, Al: 0.10% or less, N: 0.15% or less, B: 0.0005 to 0.0100%, and the balance Fe and unavoidable impurities, and in which the composition satisfies specific formulas. The stainless steel pipe has more than 45% martensite phase, 10 to 45% ferrite phase, and 30% or less retained austenite phase. The ferrite grains have a maximum crystal grain size of 500 ?m or less.

Abstract: The invention is intended to provide a high-strength stainless steel seamless pipe for oil country tubular goods having high strength with a yield strength of 862 MPa (125 ksi) or more, excellent low-temperature toughness, and excellent corrosion resistance. The invention is also intended to provide a method for manufacturing such a high-strength stainless steel seamless pipe. The high-strength stainless steel seamless pipe has a microstructure that is at least 45% tempered martensite phase, 20 to 40% ferrite phase, and more than 10% and 25% or less retained austenite phase by volume. The high-strength stainless steel seamless pipe has a yield strength of 862 MPa or more, and a maximum crystal grain diameter of 500 ?m or less for ferrite crystal grains when crystal grains with a crystal orientation difference of within 15° are defined as the same crystal grains.

Abstract: Provided herein is a high strength seamless stainless steel pipe. A method for producing such a high strength seamless stainless steel pipe is also provided. The high strength seamless stainless steel pipe has a certain composition. The high strength seamless stainless steel pipe has a structure that includes a tempered martensite phase as a primary phase, and 20 to 40% ferrite phase, and at most 25% residual austenite phase in terms of a volume fraction, and in which C, Cr, Ni, Mo, Nb, N, W, and Cu in the residual austenite phase satisfy a predetermined formula.

Abstract: A light reflecting body includes a base containing a resin material and a calcium carbonate and includes a metal layer on the surface of the base. The resin material is selected from a polyester resin composition, a polyarylate resin composition, and a mixed resin composition thereof. The calcium carbonate has a BET specific surface area of 1 to 15 m2/g, a pore distribution curve determined by mercury porosimetry that the top of a peak representing interparticle void size is in a pore size range of 0.1 to 1.0 ?m, a particle size distribution determined by using an electron microscope that the proportion of particles having a particle size of 0.1 ?m or less is 10% or less of the calcium carbonate, and the residue on a sieve having a mesh size of 45 ?m after wet sieving of the calcium carbonate is 0.1% or less.

Abstract: Provided are a calcium carbonate having a small particle diameter and easily dispersible in polymers and a production method therefor. A calcium carbonate has a magnesium content of 12000 to 120000 ppm, a BET specific surface area of 60 to 120 m2/g, and a crystallite size of (104) plane of 20 to 50 nm, and particles of the calcium carbonate are concatenated.

Abstract: Provided is a high-strength seamless stainless steel pipe for oil country tubular goods which possesses a high strength, excellent low-temperature toughness and excellent corrosion resistance even when the steel pipe has a large wall thickness. The high-strength seamless stainless steel pipe has the composition which contains, by mass %, C: 0.05% or less, Si: 1.0% or less, Mn: 0.1 to 0.5%, P: 0.05% or less, S: less than 0.005%, Cr: more than 15.0% to 19.0% or less, Mo: more than 2.0% to 3.0% or less, Cu: 0.3 to 3.5%, Ni: 3.0% or more and less than 5.0%, W: 0.1 to 3.0%, Nb: 0.07 to 0.5%, V: 0.01 to 0.5%, Al: 0.001 to 0.1%, N: 0.010 to 0.100%, O: 0.01% or less, and Fe and unavoidable impurities as a balance. Nb, Ta, C, N and Cu satisfy a specified formula. The steel pipe has a microstructure which is formed of 45% or more of a tempered martensite phase, 20 to 40% of a ferrite phase, and more than 10% and 25% or less of a residual austenite phase in terms of volume ratio.