DIN 17175 Heat-resisting seamless steel tube

DIN 17175 seamless steel pipes are used in boiler installations, high-pressure pipelines and tank construction and special machinery for both high temperature and high-pressure devices.

DIN 17175 alloy steel pipe is just a big class, and it has many classifications. 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 classifications.

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

Packing:
Inner packing: Caps on two ends of every pipe
Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements.
Surface treatment: Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.
Marking: as per customer’s requirement

Read more: DIN: Deutsche Industrie Normen (=German Industry Standard)

Term	Symbol	Explanation
Cold-finished/hard (cold-finished as-drawn)	BK	No heat treatment after the last cold-forming process. The tubes therefore have only low deformability.
Cold-finished/soft (lightly cold-worked)	BKW	After the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits.
Annealed	GBK	After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum.
Normalized	NBK	The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum.

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DIN 17175 Heat-resisting seamless steel tube