This Standard specifies the permissible tolerances of chemical composition of finished unalloyed steel (excluding boiling steel), low alloy steel and alloy stee

This Standard specifies the method principle, apparatus, sampling and sample preparation, test procedures, results calculation and precision etc. of the coke wi

This Standard specifies the dimension, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate for wel

This Standard specifies the classification, structure, requirements, test methods and sings, labels, packaging, storage, and transportation of classical V-belts

This Standard specifies tungsten powder requirements, test methods, inspection rules, marking, packaging, transportation, storage, and contract contents. This S