This standard regulates measuring method of absorbing energy of metallic materials in Charpy Impact Test( V-shape and U-shape Notch Sample). This standard doesn’t include instrumentation impact test method and this part content is regulated in GB/T 19748-2005 Metallic Materials Instrumentation Charpy Impact Test Method.

This Standard specifies the method to measure the absorbed energy of metallic material in Charpy impact test (V-nick and U-nick samples).

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 terminology, technical requirements, test methods, inspection rules, appearance, marking and supply requirements of cryogenic emergency shutoff valve (hereinafter referred to as emergency shutoff valve). This Standard applies to nominal dimensions DN 15 ~ DN 200, nominal pressure PN 16 ~ 63, operating temperature -196 ¡æ ~ -29 ¡æ, emergency automatic cut-off temperature 70 ¡æ ¡À 5 ¡æ, and using low-temperature media of oxygen, nitrogen, argon, natural gas, ethylene (O2, N2, Ar, CNG, C2H4) and other gases and liquids.

This standard specifies the scope, terms and definitions, ordering information, dimensions, shape, weight and tolerances, technical requirements, test methods, inspection rules, packing, marking and quality certificate of free-cutting structural steels. This standard is applicable to steels such as bar steels, wire rods, steel wires, steel plates, and steel strips that are used for mechanical machining. Their chemical.

GB/T 15712-2008 English-translated version

This Standard specifies the classification, ordering information, dimensions, shape and allowable deviation, technical requirements, test methods, inspection rules, packing, marking, and quality certificate of structural steel cold drawn and ground bars. This Standard is applicable to the quality carbon structural steel and alloy structural steel (round steel, square steel, and hexagonal steel) cold drawn steel bars.

This Standard specifies the steel grades,dimensions,shape,mass,tolerances,technical requirements,test methods,inspection requirements,packaging,marking and inspection documents for the high strength low alloy structural steels. This Standard apply to steel plates,steel strips,shape steels and steel bars of high strength low alloy structural steels for structure and engineering.

This Standard stipulates the principles, specimens, testing machines, test procedures and measurements, calculation of fracture mechanical parameters and test reports of instrumental impact and evaluation of fracture toughness of prefabricated cracked Charpy specimens of metal materials by fracture mechanics methods. This Standard is applicable to the determination of fracture toughness of the prefabricated cracked Charpy-type specimens of metallic materials.

This Standard specifies the order contents, classification and code, dimensions, shape, weight and permissible deviation, technical requirements, test methods, inspection rules, packing, marking and quality certificate for the cold finished stainless steel bar (general term of round steel, square steel, hexagonal steel and flat steel, hereinafter referred to as steel bar).