C55E 1.1203 XC55H1 - NF EN 10083-2-2006

Grade	C55E
	1.1203
Old Grade
Corresponding Standard	NF EN 10083-2-2006 Tempered non-alloy structural steel
Classification	Carbon Steel

C55E Chemical Element Composition Content (%)

Component	C ^①	Si	Mn	P	S ^②	Cr	Ni	Mo	More
Minimum Value	0.52	-	0.6	-	-	-	-	-	Cr+Mo+Ni≤0.63 ①
Maximum Value	0.6	0.4	0.9	0.03	0.035	0.4	0.4	0.1	Cr+Mo+Ni≤0.63 ①

C55E 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: d ≤ 16mm; t ≤ 8mm	Quenching + Tempering (+QT)	800~950	≥550	≥12	≥30	HRC ① ≥58
Steel: 16mm ≤ d ≤ 40mm; 8mm ≤ t ≤ 20mm	Quenching + Tempering (+QT)	750~900	≥490	≥14	≥35	HRC ① ≥58
Steel: 40mm ≤ d ≤ 100mm; 20mm ≤ t ≤ 60mm	Quenching + Tempering (+QT)	700~850	≥420	≥15	≥40	HRC ① ≥58
Steel: d ≤ 16mm; t ≤ 16mm	Normalizing (+N)	≥680	≥370	≥11
Steel: 16mm ≤ d ≤ 100mm; 16mm ≤ t ≤ 100mm	Normalizing (+N)	≥640	≥330	≥12
Steel: 100mm ≤ d ≤ 250mm; 100mm ≤ t ≤ 250mm	Normalizing (+N)	≥620	≥300	≥12
Steel:	Processed to a Certain Shearability (+S)					② ≤255
Steel:	Softening Annealing (+A)					≤229

Approximate Comparison Table High-Quality Carbon Structural Steel

China

Taiwan, China

Japan

South Korea

United States

International Organization for Standardization

Germany

France

Russia

Sweden

United Kingdom

ISC

CNS

JIS

ASTM/AISI

UNS

ISO

DIN EN/DIN

W-Nr.

NF EN/NF

GOST

BS EN/BS

U20552

S55C

SM55C

1055
(ASTM)

G10550

C55E4

C55E
Ck55

1.1203

C55E
XC55

1665

C55E
070M55

C55E 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"!