45Mn GB

45Mn GB

Brand number 45Mn

Corresponds to the standard GB /T 3078-2019

High quality structural steel cold drawn steel

Quality structural steel cold drawm bars

Classified carbon steel

Label High quality carbon steel

Description

① Range:

This standard specifies the classification, order content, size, shape and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of cold drawn and cold drawn polished steel of structural steel.

This standard applies to high quality carbon structural steel and alloy structural steel cold drawn steel bars (round steel, square steel and hexagonal steel) and cold drawn polished round steel.

② The grade and chemical composition of steel, high-quality carbon structural steel should meet the provisions of GB/T 699, alloy structural steel should meet the provisions of GB/T 3077. According to the requirements of the demander, and indicate in the contract can be ordered by other brands.

③ The permissible deviation of the chemical composition of the finished steel product shall comply with the provisions of GB/T 222.

④ The size, shape and allowable deviation of the cold drawn steel rod shall comply with the provisions of GB/T 905-1994, the specific requirements shall be indicated in the contract, if not indicated, according to the h11 level.

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