C45 1.0503 - EN 10277-2-2008

Grade	C45
European Standard Steel Grade	1.0503
Corresponding Standard	EN 10277-2-2008 Bright steel products - Technical delivery conditions - Part 2: Steels for general engineering purposes
Classification	Carbon Steel

C45 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo	More
Minimum Value	0.42	-	0.5	-	-	-	-	-	Cr+Mo+Ni≤0.63
Maximum Value	0.5	0.4	0.8	0.045	0.045	0.4	0.4	0.1	Cr+Mo+Ni≤0.63

C45 Mechanical Properties

thickness t mm	Mark	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
5≤t≤10	C45+C	Cold Rolling (+C)	750~1050	≥565	≥5
10＜t≤16	C45+C	Cold Rolling (+C)	710~1030	≥500	≥6
16＜t≤40	C45+C	Cold Rolling (+C)	650~1000	≥410	≥7
40＜t≤63	C45+C	Cold Rolling (+C)	630~900	≥360	≥8
63＜t≤100	C45+C	Cold Rolling (+C)	580~850	≥310	≥8
16＜t≤100	C45+SH	Rolling and turning (+SH)	580~820			172~242

1 Approximate Comparison Table Carbon Structural Steel and Engineering Steel

China	Japan	International Organization for Standardization	European Standard
GB	JIS	ISO	EN	Numerical Grade
45	S45C	C45	C45	1.0503

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
45	S45C	1042 1045 Gr.1043	C45	C45	AF65C45 C45	C45	1.0503	45	1650	070M46 50HS

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 45	S45C	1045	ISO 630-1:1987 C45 C45E4 C45M2	C45 XC45	45	060A42 060A47

C45 Corresponding Standards(Same grade name, different standards)

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