Grade 30MnB5
Corresponding Standard EN ISO 683-2-2018
Heat-Treatable Steels,Alloy Steels and Free-Cutting Steels--Part 2:Alloy Steels for Quenching and Tempering
Classification Alloy Steel
30MnB5 Chemical Element Composition Content (%)
Component C Si Mn P S Cu B
Minimum Value 0.27 - 1.15 - - - 0.0008
Maximum Value 0.33 0.4 1.45 0.025 0.035 0.4 0.005
30MnB5 Mechanical Properties
condition Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Reduction of Area
ψ
%
Impact Energy Absorption
KV2
J
Bar, flat material, forging; d≤16 or t≤8 950~1150 ≥800 ≥13 ≥50 -
Bar, flat material, forging; 16<d≤40 or 8<t≤20 800~950 ≥650 ≥13 ≥50 ≥60
Approximate Comparison Table Structural Alloy Steel
China European Standard
GB EN
35MnB 30MnB5
30MnB5 Corresponding Standards(Same grade name, different standards)

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