What is the material of DIN17175
DIN 17175 is the German standard for seamless steel tubes used in boilers and pressure vessels. The material is essentially:
✅ Heat-resistant steel
✅ It is primarily divided into two categories:
Carbon steel tubes (such as St35.8, St45.8)
Chromium-molybdenum alloy tubes (such as 15Mo3, 13CrMo44, 10CrMo910)
Chemical Requirements of DIN17175
| Chemical Composition % |
Grade | C | Mn | P | S | Si | Cr | Mo |
| St35.8 | ≤0.17 | 0.40-0.80 | ≤0.40 | ≤0.040 | 0.1-0.35 | / | / | |
| St45.8 | ≤0.21 | 0.40-1.20 | ≤0.40 | ≤0.040 | 0.1-0.35 | / | / | |
| 15Mo3 | 0.12-0.20 | 0.04-0.80 | ≤0.030 | ≤0.030 | 0.10-0.35 | – | 0.25-0.35 | |
| 13CrMo44 | 0.10-0.18 | 0.04-0.70 | ≤0.030 | ≤0.030 | 0.10-0.35 | 0.70-1.10 | 0.44-0.65 | |
| 10CrMo910 | 0.08-0.15 | 0.04-0.70 | ≤0.030 | ≤0.030 | ≤0.50 | 2.00-2.50 | 0.90-1.20 | |
| 14MoV63 | 0.10-0.18 | 0.40-0.70 | ≤0.025 | ≤0.020 | 0.1-0.35 | 0.30-0.60 | 0.50-0.70 | |
| 12Cr1MoV | 0.08-0.15 | 0.40-0.70 | ≤0.025 | ≤0.020 | 0.17-0.37 | 0.90-1.20 | 0.25-0.35 |
Mechanical Property of DIN1715 Pipe
| Mechanical Property | Grade | Tensile Strength(Mpa) | Yield Strength(Mpa) | Elongation(%) | ||||
| St35.8 | 360-480 | ≥235 | ≥25 | |||||
| St45.8 | 410-530 | ≥255 | ≥21 | |||||
| 15Mo3 | 450-600 | ≥270 | ≥20 | |||||
| 13CrMo44 | 440-590 | ≥290 | ≥20 | |||||
| 10CrMo910 | 450-600 | ≥280 | ≥18 | |||||
| 14MoV63 | 460-610 | ≥310 | ≥18 | |||||
| 12Cr1MoV | 690-840 | ≥490 | ≥14 | |||||
Tolerance of DIN17175 pipe
| Tolerance | Out diameter | Hot roll steel pipe | OD ≤ 100mm | ± 0.75%( Min ± 0.5mm ) | ||||
| OD＞ 100~ 320mm | ± 0.9% | |||||||
| Cold drawn steel pipe | OD ≤ 120mm | ± 0.6%( Min ± 0.25mm ) | ||||||
| Wall Thickness | OD≤130mm | WT ≤ 2Sn | +15%~-10% | |||||
| WT ＞ 2Sn~4Sn | +12.5%~-10% | |||||||
| WT ＞ 4Sn | ± 9% | |||||||
| 130＜OD≤320mm | WT ≤ 0.05OD | +17.5%~-12.5% | ||||||
| 0.05OD ＜ WT ≤ 0.11OD | ± 12.5% | |||||||
| WT ＞ 0.11OD | ± 10% | |||||||
| Note: Sn–Normal wall thickness according DIN2448 | ||||||||
DIN17175 Equivalent material
| DIN Grade | Composition Features | China GB Equivalent | USA ASME Equivalent | Temp Limit |
|---|---|---|---|---|
| St35.8 | Carbon Steel (C≤0.17%) | 20G | SA-210A1 | ≤450℃ |
| 15Mo3 | Molybdenum Steel (Mo 0.25-0.35%) | 15CrMoG | SA-209 T1 | ≤480℃ |
| 13CrMo44 | Chromium-Moly Steel (Cr 1.0%, Mo 0.5%) | 12Cr1MoVG | SA-213 T11 | ≤540℃ |
| 10CrMo910 | High Cr-Mo Steel (Cr 2.25%, Mo 1%) | 12Cr2MoG | SA-213 T22 | ≤650℃ |
Test and inspection
Packaging and shipping
