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Hebei haihao high pressure flange & pipe fitting group was established in 1982, located in Mengcun County the hometown of pipe fittings in China.


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DIN 17175 seamless steel tube for elevated temperature St35.8, St45.8, 17Mn4, 19Mn5, 15Mo3, 13CrMo44


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
DIN 17175 seamless steel tube for elevated temperature St35.8, St45.8, 17Mn4, 19Mn5, 15Mo3, 13CrMo44

DIN 17175 seamless steel tube for elevated temperature St35.8, St45.8, 17Mn4, 19Mn5, 15Mo3, 13CrMo44

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