C55E - DIN EN ISO 683-1-2018

Grade	C55E
Corresponding Standard	DIN EN ISO 683-1-2018 Heat-treatable steels,alloy steels and free-cutting steels--Part 1: Non-alloy steels for quenching and tempering
Classification	Carbon Steel

C55E Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	More
Minimum Value	0.52	0.1	0.6	-	-	-	-	-	-	Cr+Mo+Ni≤0.63
Maximum Value	0.6	0.4	0.9	0.025	0.035	0.4	0.4	0.3	0.1	Cr+Mo+Ni≤0.63

C55E Mechanical Properties

	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
d≤16; t≤8	Quenching and Tempering	800~950	≥550	≥12	≥30
16＜d≤40；8＜t≤20	Quenching and Tempering	750~900	≥490	≥14	≥35
40＜d≤100；20＜t≤60	Quenching and Tempering	700~850	≥420	≥15	≥40
d≤16；t≤16	Normalizing (N)	≥680	≥370	≥11
16<d≤100；16＜t≤100	Normalizing (N)	≥640	≥330	≥12
100<d≤250；100＜t≤250	Normalizing (N)	≥620	≥300	≥12
All Sizes	Shearable Condition (+S)					≤255
All Sizes	Softening Annealing (+A)					≤229
d≤100；t≤100	Flame or Induction Quenching					HRC ≥58

New and Old Grade Replacement List

1 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

2 Approximate Comparison Table Plastic Mold Steel

China			Japan	United States	International Organization for Standardization	Germany		Sweden
YB	GB	ISC	JIS	ASTM/AISI	ISO	DIN EN/DIN	W-Nr.	SS
SM55	SM55	T10550	S55C	1055	C55E4	C55E	1.1203	1665

C55E Corresponding Standards(Same grade name, different standards)

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