45Mn GB
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45Mn GB

Mechanical properties: Tensile strength σb (MPa):≥620(63) Yield strength σs (MPa):≥375(38) Elongation δ5 (%):≥15 Section shrinkage ratio ψ (%):≥40 Impact power Akv (J):≥39 Impact toughness value αkv (J/cm2):≥49(5) Hardness: no heat treatment ≤241HB; Annealed steel ≤217HB Heat treatment process :850℃ normalizing, 840℃ quenching, 600℃ tempering.
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Product Introduction

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.

GBT 45Mn Chemical Composition Properties Datasheet

China Japan America ISO French Russia Sweden England
GB ISC JIS ASTM/AISI UNS ISO NF EN/NF GOST SS BS EN/BS
45Mn U21452 (SWRH47B) 1046 G10460 SL
SM
45M5 45г 1672 080A47

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