А12 A12 - GOST 1414-1975 - H2ABC

中文版

Grade	А12
Other Names
Corresponding Standard	GOST 1414-1975 Structural Steel of Improved and High Machinability
Classification	Carbon Steel

А12 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.08	0.15	0.7	0.08	0.08	-	-	-
Maximum Value	0.16	0.35	1.1	0.15	0.2	0.25	0.25	0.25

А12 Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
All size	Hot-rolled, without heat treatment	≥410	≥22	≥34	≤160
d≤30	calibrated and cold-worked	≥510	≥7		≤217
d＞30	calibrated and cold-worked	≥460	≥7		≤217

Approximate Comparison Table Free-Cutting Structural Steel

China		Taiwan, China	Japan	South Korea	United States	International Organization for Standardization	Germany		France	Russia
GB	ISC	CNS	JIS	KS	ASTM/AISI	ISO	DIN EN/DIN	W-Nr.	NF EN/NF	GOST
Y12	U71122	SUM21	SUM21	SUM21	B1112 1211①	10S20	10S20	1.0721	13MF4	А12

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!