DIN 17175 alloy steel pipe is just a big class,and it has many classifivations. We mainly produce DIN 17175 ST35.8,DIN 17175 ST45.8, and 10CrMo910 steel pipes. This alloy steel pipe is just a big class,and it has many classifivations.
We mainly produce DIN 17175 ST35.8,DIN 17175 ST45.8, and 10CrMo910 steel pipes.

Steel grade:
DIN17175 St35.8
DIN17175 St45.8
15Mo3
13CrMo44
10CrMo910

Chemical Compositions of DIN 17175 steel pipes (%)

Grade	C	Si	Mn	P	S	Cr	Mo
St35.8	≤0.17	0.10-0.35	0.40-0.80	≤0.040	≤0.040	/	/
St45.8	≤0.21	0.10-0.35	0.40-1.20	≤0.040	≤0.040	/	/
15Mo3	0.12-0.20	0.10-0.35	0.40-0.80	≤0.035	≤0.035	/	0.25-0.35
13CrMo44	0.10-0.18	0.10-0.35	0.40-0.70	≤0.035	≤0.035	0.70-1.10	0.46-0.65
10CrMo910	0.08-0.15	≤0.50	0.40-0.70	≤0.035	≤0.035	0.20-0.25	0.90-1.20

Mechanical Properties of DIN17175 steel pipe

Grade	Yield Strength (Mpa)	Tensile Strength (Mpa)	Elongation(%)
St35.8	≥235	360-480	25
St45.8	≥255	410-530	21
15Mo3	≥275	450-600	20
13CrMo44	≥290	440-590	20
10CrMo910	≥280	450-600	18

EN 10216-2, Quality P235 GH (formerly DIN 17175, St.35.8 Cl. 1, boiler pipe)

P = Pressure

235 = minimum yield strength in N/mm2

GH = tested properties at higher temperatures

OLD				New
Execution	Norm	Steel grade		Execution	Norm	Steel grade
Welded	DIN 1626	St.37.0		Welded	DIN EN 10217-1	P235TR2
Welded	DIN 1626	St.52.2		Welded	DIN EN 10217-3	P355N
Seamless	DIN 1629	St.37.0		Seamless	DIN EN 10216-1	P235TR2
Seamless	DIN 1629	St.52.2		Seamless	DIN EN 10216-3	P355N
Seamless	DIN 17175	St.35.8/1		Seamless	DIN EN 10216-2	P235GH
Seamless	ASTM A106*	Grade B		Seamless	DIN EN 10216-2	P265GH
Seamless	ASTM A333*	Grade 6		Seamless	DIN EN 10216-4	P265NL