Y45Mn U70456 - GB /T 8731-2008

Grade	Y45Mn
China ISC	U70456
Corresponding Standard	GB /T 8731-2008 Free-Cutting Structural Steel
Classification	Carbon Steel
Properties	Machinability

Y45Mn Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	0.4	-	1.35	-	0.16
Maximum Value	0.48	0.4	1.65	0.4	0.24

Y45Mn Mechanical Properties

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
d=20 (Sample Diameter)	Hot Rolled Delivery Condition	610~900	≥12	≥20	≤241
d = 8~20 (steel size)	Cold Drawn State Delivery	695~980	≥6		196~255
d > 20 ~ 30 (steel size)	Cold Drawn State Delivery	655~880	≥6		196~255
d > 30 (steel size)	Cold Drawn State Delivery	580~880	≥6		196~255

Approximate Comparison Table Free-Cutting Structural Steel

China

Taiwan, China

Japan

South Korea

United States

International Organization for Standardization

France

European Standard

Russia

United Kingdom

ISC

CNS

JIS

ASTM/AISI

UNS

SAE

ISO

NF EN/NF

Numerical Grade

GOST

BS EN/BS

Y40Mn
Y45Mn

L20409

SUM42

SUM42
SUM43

SUM42

1141

G11410

SAE 1144

44SMn28

40M5

44SMn28

1.0762

А10Г

212M44

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