Din17175 Boiler Tube description
DIN 17175 is a specific standard developed by the German Institute for Standardization (DIN) for seamless steel tubes for boilers and pressure vessels, focusing on material reliability under high temperature and high pressure conditions. Its core mission is to ensure the safe operation of pipelines in thermal systems (such as power plant boilers and chemical reactors), with particular emphasis on high-temperature creep resistance and long-term structural stability.
Chemical Compositions of DIN 17175
| 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
| 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 |
DIN17175 V.S A179
| Dimension | DIN 17175 (German Standard) | ASTM A179 (U.S. Standard) |
|---|---|---|
| Core Purpose | High-pressure boiler piping (steam temp ≥450°C) | Condenser tubes for heat exchangers (low-temp applications) |
| Material Type | Heat-resistant steel (carbon/Cr-Mo alloy) | Low-carbon steel (non-alloy) |
| Service Temp | Up to 650°C (Grade 10CrMo910) | ≤450°C (overheating causes oxidation failure) |
| Tensile Strength | 450-600 MPa (e.g., 15Mo3) | ≥325 MPa |
| Yield Strength @500°C | ≥180 MPa (mandatory) | Not tested (non-high-temp tube) |
| Carbon Content | ≤0.20% | 0.06-0.18% |
| Key Inspection | Decarb depth ≤0.3mm + 520°C tensile test | Eddy current test + hydrostatic test |
Test and inspection
Packaging and shipping
