Gb T 6725 2008 Translated English Of Chinese Standard Gbt 6725 2008 Gb T6725 2008 Gbt6725 2008

This Standard specifies cold forming steel sections in terms of order, classification and code, dimension, shape, weight and permissible deviation, technical requirements, test method, acceptance rules and packaging, marking and quality certificate.

This Standard specifies the order content, classification and code, size, appearance, weight and allowable deviation, technical requirements, test methods, acceptance rules, packaging, marks and quality certificate. This Standard is applicable to cold forming steel produced on continuous roll cold bending unit by cold-processed textured cold-rolled, hot-rolled or coated (plated) steel sheets and strips.

This Part of GB/T 19363.1 specifies the translation services - translation services specifications. This Part is applicable to translation services.

This Standard specifies the method principle, apparatus, sampling and sample preparation, test procedures, results calculation and precision etc. of the coke with particle size greater than 60mm and 25mm. This Standard is applicable to the determination of mechanical strength of coke with particle size no less than 25mm. The coke with particle size less than 25mm can also refer to this Standard.

This Method specifies the determination method for total rare earth contents in rare earth metals and their compounds. This Method is applicable to the determination of total rare earth contents in individual and mixed rare earth metals and their compounds. See Table 1 for the range of determination. This Method is not applicable to the determination of total rare earth contents in individual and mixed rare earth metals and their compounds of which holmium, erbium, thulium, ytterbium, lutecium compose the main body or the thorium content, the lead content (mass fraction) is greater than 0.1%, respectively.

This Standard specifies the technical requirements, test methods, as well as packaging, marking, storage, safety warning of pure nitrogen, high purity nitrogen and ultra pure nitrogen products. This Standard applies to gaseous or liquid pure nitrogen, high purity nitrogen and ultra-pure nitrogen obtained from air separation or purification. They are mainly used as the protective gas, replacement gas, reaction gas, etc. Molecular formula: N2. Relative molecular mass: 28.1034 (according to relative atomic mass in 2005).

This Standard stipulates the basic requirements for the type and size, profile size and deviation, technical requirements, marking and packaging of thread rolling flat dies for general purpose metric screw threads. This Standard applies to thread rolling flat dies for processing general purpose metric screw threads (GB/T 192~193, GB/T 196~197). Thread rolling flat dies are divided into three precision grades: grade 1, grade 2 and grade 3. Grade 1 applies to the processing of external threads with tolerance grades 4 and 5; grade 2 applies to the processing of external threads with tolerance grades 5 and 6; grade 3 applies to the processing of external threads with tolerance grades 6 and 7.

This standard specifies general specifications for acceptance, packaging, marking and certification for section steel (steel bar and rod). This Standard is applicable to hot rolling, cold drawing (rolling), forging and heat treating section steel.