Abstract: The invention relates to a process and installation for making stainless els coated with a lead-based alloy and having undergone annealing. The surface of the product is first prepared by mechanical treatment, then the product is pre-coated by known techniques such as hot tin-plating, after which the annealing treatment is effected, followed by the final coating. Such products may be used, inter alia, in the manufacture of car radiators.

Abstract: A smoothing rolling mill having identical frusto-conical smoothing rollers ounted on axes inclined to the axis of displacement of a tube blank passing between the rollers. The axes of the rollers converge in the direction of displacement of the tube blank. The tube blank is rotated and displaced axially between the smoothing rollers in a conventional manner. If desired, the shafts which mount the rollers for rotation can be pre-loaded with respect to the tube blank.

Abstract: Circumferential stresses in tubes are relieved by exerting an axial pull on tube sufficient to elongate the tube at least 0.2%, and maintaining the pull on the tube for a predetermined period of time. The extent of elongation can be as much as 1% and the axial pull can be maintained for several minutes. The technique is particularly useful for substantially reducing or eliminating circumferential stresses in thin wall tubes which are created by straightening the tube with hyperbolic profile rollers.

Abstract: A pilgrim step rolling mill in which a carriage for advancing the product be rolled toward the roller cage is driven intermittently in synchronism with the reciprocation of the roller cage by a screw which is both reciprocated axially and continuously rotated. The carriage advances to drive the product only in response to axial movement of the screw in one direction. The overall mill arrangement reduces the number of and extent of the gearing required.

Abstract: The specification discloses a rolling mill for forming seamless tubes from n extruded blank wherein the mandrel is driven through the milling gap in a direction tangential to the milling rolls at a speed of from about 5% to about 10% of that of the tube blank during milling. Similarly the mandrel has a length of from about 5% to about 10% of that of the tube blank.A further pair of milling rolls may be provided, adjacent the first and rotatable about mutually parallel axes orthogonal to the mutually parallel axes of rotation of the first pair of rolls in which case the mandrel will be twice as long as that required for a single milling roll gap.

Abstract: Apparatus for the radiographic inspection of tubes comprises a chamber coining a radiation emitter, a carriage for positioning a selected section of the tube opposite the emitter, a movable member for positioning a film inside the tube opposite the emitter, and a remote control system for operating the emitter, carriage, and movable member from outside the chamber. Method of making a film of a selected area of said tube with said apparatus.

Abstract: A turning mechanism for the movement of casting ladles in steel mills of type wherein a member turning about a vertical shaft is provided with two diametrically opposite arms adapted to receive in each case a casting ladle. Each arm is fork-shaped and mounted to swing about a horizontal shaft fixed to the upper portion of the turning member. The two forked ends each receive a vertical support for the ladle pivotally mounted on a horizontal pivot received in the said forked end each support being pivotally connected at its upper end to one end of a rod whose other end is pivotally connected to the upper portion of the said turning member in such a way that the arm forms on each occasion with the corresponding rod a deformable parallelogram which constantly maintains the support in the vertical direction during the rotation of the arms.

Abstract: Tube rolling mill of the STIEFEL type comprises a feed trough and a member etween the trough and mill rolls over which the tube and plug pass. This member is movable between a first position in which it supports the tube and plug in alignment with the feed trough and a second in which it directs the plug into a discharge chute.