Ck25 1.1158 - DIN 17200-1987

Grade	Ck25
Germany W-Nr.	1.1158
Corresponding Standard	DIN 17200-1987 Steels for Quenching and Tempering; Technical Delivery Conditions
Classification	Carbon Steel

Ck25 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	0.22	-	0.4	-	-
Maximum Value	0.29	0.4	0.7	0.035	0.03

Ck25 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	Impact Energy Absorption KV2 J
Steel; All Sizes	Softening Annealing (G)					≤156
Steel; d≤16	Quenching and Tempering (V)	550~700	≥370	≥19	≥45		ISO-V ≥45
Steel; 16<d≤40	Quenching and Tempering (V)	500~650	≥320	≥21	≥50		≥45
Flat steel; d≤16	Normalizing (N)	420~570	≥260		Longitudinal ≥25
Flat steel; 16<d≤100	Normalizing (N)	420~570	≥240		≥25
Flat Steel; 100<d≤160	Normalizing (N)	400~550	≥220		≥23

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

United Kingdom

ISC

CNS

JIS

ASTM/AISI

UNS

ISO

DIN EN/DIN

W-Nr.

NF EN/NF

GOST

BS EN/BS

U20252

S25C

SM25C

1025

G10250

C25E4

C25E
Ck25

1.1158

C25E
XC25

C25E
070M26

2 Approximate Comparison Table Non-Alloy Steel for Quenching and Tempering

Japan	International Organization for Standardization	Germany	France	European Standard		Russia	United Kingdom
JIS	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	BS EN/BS
S25C	C25E4	Ck25	XC25	C25E	1.1158	25	070M26

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!