55CrMn A22553 - GB /T 1222-2025

55CrMn Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.52	0.17	0.65	-	-	0.65	-	-
Maximum Value	0.6	0.37	0.95	0.025	0.02	0.95	0.35	0.2

55CrMn Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %
Quenched in oil at 840±20°C and tempered at 485±50°C	≥1225	ReL ≥1080	≥9	≥20

1 Approximate Comparison Table Spring Steel

China		Taiwan, China	Japan	South Korea	United States		International Organization for Standardization	Germany		France	United Kingdom
GB	ISC	CNS	JIS	KS	AISI	UNS	ISO	DIN EN/DIN	W-Nr.	NF EN/NF	BS EN/BS
55CrMnA	A22553	SUP9	SUP9	SPS5	5155	G51550	55Cr3	55Cr3	1.7176	55C3	≈527A60

55CrMn 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"!