Gb T 1221 2007 Translated English Of Chinese Standard Gbt 1221 2007 Gb T1221 2007 Gbt1221 2007

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 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 General Rule is applicable to the selection of samples for the inspection the chemical composition, water content, particle size and other physical items of batches of fluorspar (i.e., fluorite), alumina, talc, manganese ore, iron ore, chromium ore in bulk. Other bulk mineral products such as: barite, magnesia, feldspar, clay, plaster, limestone, dolomite, magnesite, etc. can also be implemented by reference. When formulating a manual sampling method standard for a particular bulk mineral product, this general rule should be used as a guiding document.

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 stamping parts tolerance grade and limit deviation for linear and angular dimensions without individual tolerance indication. This Standard is applicable to the metal stamping parts; while the non-metal stamping parts can be implemented as per this Standard. The limit deviations specified in this Standard are applicable to the non-coordinating size. Precision stamping and extrusion parts can refer to the use of this Standard.

This standard specifies the requirements, test methods, inspection rules and marking, packaging, transportation, storage and contract contents of copper and copper-alloy cold-drawn rod and bar.