Grade А30
Other Names
Corresponding Standard GOST 1414-1975
Structural Steel of Improved and High Machinability
Classification Carbon Steel
А30 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu
Minimum Value 0.26 0.15 0.7 - 0.08 - - -
Maximum Value 0.35 0.35 1 0.06 0.15 0.25 0.25 0.25
А30 Mechanical Properties
condition Heat Treatment or Condition
Tensile Strength
σb
Mpa
Elongation or Extension Rate
δ
%
Reduction of Area
ψ
%
Hardness
HBW
All size Hot-rolled, without heat treatment ≥510 ≥15 ≥25 ≤185
All size Combined cold-worked ≥540 ≥6 ≤223
Approximate Comparison Table Free-Cutting Structural Steel
China United States Russia
GB ISC ASTM/AISI GOST
Y30 U70302 1130 А30

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