Ck55 1.1203 - DIN 17204-1990

Grade	Ck55
Germany W-Nr.	1.1203
Corresponding Standard	DIN 17204-1990 Seamless circular tubes made from steels for quenching and tempering Technical delivery conditions
Classification	Carbon Steel

Ck55 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	0.52	-	0.6	-	-
Maximum Value	0.6	0.4	0.9	0.035	0.035

Ck55 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
Hot drawn, cold drawn pipes	Annealing					≤229
Pipe material t≤16	Normalizing (N)	670~820	≥370	≥14(long.)；≥12(tr.)
Pipe material 16<t≤40	Normalizing (N)	650~800	≥350	≥15(long.)；≥13(tr.)
Pipe material 40<t≤80	Normalizing (N)	620~770	≥340	≥15(long.)；≥13(tr.)
Pipes t≤8	Quenching + Tempering (V)	800~1000	≥550	≥12(long.)；≥10(tr.)	≥30
Pipes; 8< t≤20	Quenching + Tempering (V)	750~950	≥490	≥14(long.)；≥12(tr.)	≥35
Pipes; 20< t≤50	Quenching + Tempering (V)	700~900	≥420	≥15(long.)；≥13(tr.)	≥40
Pipe; 50<t≤80	Quenching + Tempering (V)	660~860	≥390	≥15(long.)；≥13(tr.)	≥40

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

3 Approximate Comparison Table Spring Steel

4 Approximate Comparison Table High-Quality Carbon Structural Steel

Japan	United States	International Organization for Standardization	Germany	France	European Standard		Russia	United Kingdom
JIS	ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	BS EN/BS
S55C	1055	C55E4	Ck55	XC54 XC55H1	C55E	1.1203	55	070M55

Ck55 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"!