C55 1.0535 - DIN 17200-1987

C55 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Pb ^*
Minimum Value	0.52	-	0.6	-	-	0.15
Maximum Value	0.6	0.4	0.9	0.045	0.045	0.33

C55 Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
Steel; All Sizes	Shearable condition (C)					≤255
Steel; All Sizes	Softening Annealing (G)					≤229
Steel; d≤16	Quenching and Tempering (V)	800~950	≥550	≥12	≥25
Steel; 16<d≤40	Quenching and Tempering (V)	750~900	≥500	≥14	≥30
Steel; 40<d≤100	Quenching and Tempering (V)	700~850	≥430	≥15	≥35
Bars; 16<d≤100	Normalizing (N)	660~830	≥360		≥15
Flat steel; d≤16	Normalizing (N)	630~870	≥370		Longitudinal ≥15
Flat steel; 16<d≤100	Normalizing (N)	630~870	≥330		≥15
Flat Steel; 100<d≤160	Normalizing (N)	610~850	≥300		≥13

New and Old Grade Replacement List

Approximate Comparison Table

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
C55	S55C	1055	C55 C55E4	C55	AF70C55 C54	C55	1.0535	50 55	1655	070M55 50 En9

C55 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"!