C50 - ISO 683-18-2014

Grade	C50
Corresponding Standard	ISO 683-18-2014 Heat-treatable Steels, Alloy Steels and Free-Cutting Steels - Part 18: Bright Steel Products
Classification	Carbon Steel

C50 Chemical Element Composition Content (%)

Component	C	Si ^①	Mn	P	S	Cr	Ni	Cu	Mo	More
Minimum Value	0.47	0.1	0.6	-	-	-	-	-	-	Cr+Mo+Ni≤0.63
Maximum Value	0.55	0.4	0.9	0.045	0.045	0.4	0.4	0.3	0.1	Cr+Mo+Ni≤0.63

C50 Mechanical Properties

	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
5≤t≤10	Cold drawn (+C)	770~1100	≥590	≥5
10＜t≤16	Cold drawn (+C)	730~1080	≥520	≥6
16＜t≤40	Cold drawn (+C)	690~1050	≥440	≥7
40＜t≤63	Cold drawn (+C)	650~1030	≥390	≥8
16＜t≤100	As-rolled + peeled (+SH)	610~910			179~269

1 Approximate Comparison Table Carbon Structural Steel and Engineering Steel

China	Japan	International Organization for Standardization
GB	JIS	ISO
50	S50C	C50

2 Approximate Comparison Table High-Quality Carbon Structural Steel

China	Japan	United States	International Organization for Standardization	Germany	France	European Standard		Russia	Sweden	United Kingdom
GB	JIS	ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	SS	BS EN/BS
50	S50C	1049 1050	C50 C50E4	C50 Ck50	XC48H1	C50	1.0540	50	1674	070M50 080M50

3 Approximate Comparison Table High-Quality Carbon Structural Steel

China	Japan	United States	International Organization for Standardization	France	Russia	United Kingdom
GB	JIS	ASTM/AISI	ISO	NF EN/NF	GOST	BS EN/BS
GB/T 699-1999 50	S50C	1049 1050	ISO 630-1:1987 C50 C50E4 C50M2	C50 XC48	50	060A52

C50 Corresponding Standards(Same grade name, different standards)

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