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.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
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 |
| 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 |
