Ck67 1.1231 - DIN 17222-1979

Grade	Ck67
Germany W-Nr.	1.1231
Corresponding Standard	DIN 17222-1979 Cold Rolled Steel Strips for Springs Technical Condition of Delivery
Classification	Carbon Steel

Ck67 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	0.65	0.15	0.6	-	-
Maximum Value	0.72	0.35	0.9	0.035	0.035

Ck67 Mechanical Properties

thickness t mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %	Hardness HBW
t≤3*	Cold Rolled + Soft Annealing (G)	≤640	≥12	HV** ≤190
t≤2.5****	Cold Rolled + Quenching + Tempering (H+A)	*** 1230~1770		365~525
t≤2.5	Quenching			≥680

New and Old Grade Replacement List

1 Approximate Comparison Table High-Quality Carbon Structural Steel

China		United States		International Organization for Standardization	Germany		France	Russia	Sweden	United Kingdom
GB	ISC	ASTM/AISI	UNS	ISO	DIN EN/DIN	W-Nr.	NF EN/NF	GOST	SS	BS EN/BS
65	U20652	1065	G10650	SL SM	Ck67	1.1231	XC65	65	1770	060A67

2 Approximate Comparison Table Spring Steel

China		Japan	United States		International Organization for Standardization	Germany		France	Russia	Sweden	United Kingdom
GB	ISC	JIS	AISI	UNS	ISO	DIN EN/DIN	W-Nr.	NF EN/NF	GOST	SS₁₄	BS EN/BS
65	U20652	SUP2	1065	G10650	Type DC	Ck67	1.1231	XC65	65	1770	060A67

3 Approximate Comparison Table Spring Steel

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