This Standard specifies the size, shape, technical requirements, test methods, acceptance rules, packing marks, certificate of quality and other contents of heatresistant steel rods.

This Standard specifies the dimensions, shape, technical requirements, test methods, inspection rules, packing marks, and certificate quality of stainless steel bars (generic terms of round steel, square steel, flat steel, hexagonal steel and octagonal steel. This Standard is applicable to the hot rolled and forged steel bars of which the dimension (diameter, side length, thickness or subtense distance) is no more than 250mm. Through negotiations of both the Supplier and Buyer, it may also supply the hot rolled and forged steel bars of which the dimension is more than 250mm.

This Part specifies the permissible variations of chemical composition for titanium and titanium alloy pressure wrought products (plates, strips, foils, tubes, rods, wires, forging stocks, and profiles). This Part applies to the check analysis of chemical composition for titanium and titanium alloy pressure wrought products. This Part does not apply to the analysis of exit-factory products of the production plant. This Part does not apply to the check analysis of changes in the content of impurity elements (such as hydrogen, nitrogen, oxygen) caused by the reprocessing of the product by the purchaser.

This Standard specifies technical requirements, test methods, inspection rules, packaging, storage, marks and quality certificate of ferroniobium. This Standard is applicable to ferroniobium that is made from niobium pentoxide and niobium concentrate and is used for steelmaking or casting as an additive, for electrode as alloying agent, magnetic material.

This Standard specifies requirements, test methods, inspection rules and marks, packaging, transport, storage and contract content of titanium and titanium alloy plate and sheet. This Standard is applicable to titanium and titanium alloy plate and sheet of various uses.

This Standard specifies the order contents, dimension, shape, weight, allowable variation, technical requirements, test methods, test rules, packing, marking and quality certificate of hot-rolled, forged and cold drawn spring steel. This Standard is applicable to the round spring steel with diameter no larger than 100mm, square steel with side length no larger than 100mm (hereinafter referred to as steel bar), flat spring steel with thickness no larger than 40mm and spring steel wire rod with diameter no larger than 25mm [excluding the wire rod for oil hardening-tempering steel spring wire-rod (YB/T 5365)]. According to the consultation by the supplier and the purchaser, steel bar with diameter or side length greater than 100mm, flat steel with thickness 40mm and wire rod with diameter greater than 25mm can also be supplied.

This standard specifies the general principles for direct visual testing and remote visual testing when using the visual testing to determine whether the product complies with the specified requirements (e.g., surface condition of the workpiece, alignment of the mating surface, shape of the workpiece). This standard does not apply to the use of any other destructive or nondestructive testing methods to carry out testing activities. The basic rules applicable to the application of non-destructive testing as specified in GB/T 5616 apply to this standard.