Y45Mn U71453 - GB /T 8731-2025

Grade	Y45Mn
China ISC	U71453
Corresponding Standard	GB /T 8731-2025 Free-Cutting Structural Steels
Classification	Carbon Steel

Y45Mn Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	0.4	-	1.35	-	0.15
Maximum Value	0.5	0.4	1.65	0.04	0.24

Y45Mn Mechanical Properties

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %	Hardness HBW
d≤20 (Sample Diameter)	Hot Rolled (forged）	610~900		≤241
8＜d≤20 (nominal size)	Cold Drawn	695~980	≥6	196~255
20＜d≤30 (nominal size)	Cold Drawn	655~880	≥6	196~255
d > 30 (nominal size)	Cold Drawn	580~880	≥6	196~255

Y45Mn Corresponding Standards(Same grade name, different standards)

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