DIN 17155 Pressure Vessel Carbon Steel Coil: High-Temperature Alloy for Industrial Boilers & Pressure Systems
DIN 17155 Pressure Vessel Carbon Steel Coil Product Overview
DIN 17155 is a carbon-molybdenum and chromium-molybdenum steel designed for boilers, pressure vessels, and high-temperature pipelines operating at -20°C to 600°C. Available in grades like 15Mo3, 13CrMo44, and 19Mn6, it combines elevated temperature strength with creep resistance, meeting EN 10028-2 P355GH and ASME SA-387 standards. Ideal for power plants and petrochemical refineries, it replaces costlier stainless steels in steam drums, heat exchangers, and hydrocrackers.
Key Technical Specifications
1. Manufacturing & Dimensional Tolerances
- Process:
- Hot-rolled: 2.75–150mm (±1.0% thickness tolerance per DIN EN 10029)
- Cold-rolled: 0.2–3mm (±0.25% tolerance for precision forming)
- Width: 45–2,200mm (compatible with CNC machining for flanges/nozzles)
- Surface: Shot-peened (SA 2.5) or pickled (EP coating for corrosion resistance)
2. Chemical Composition
| Grade | C (%) | Mo (%) | Cr (%) | Mn (%) | Key Alloy Features |
|---|---|---|---|---|---|
| 15Mo3 | 0.12–0.20 | 0.25–0.35 | ≤0.25 | 0.40–0.90 | Mo-enhanced creep resistance |
| 13CrMo44 | 0.08–0.18 | 0.40–0.60 | 0.70–1.10 | 0.40–1.00 | Cr-Mo synergy for oxidation resistance |
| 19Mn6 | ≤0.20 | ≤0.08 | ≤0.30 | 0.90–1.70 | High Mn for weldability |
Trace elements:
- P/S: ≤0.035% (Grade 15Mo3), ≤0.025% (Grade 19Mn6)
- Al: ≥0.020% for grain refinement
Mechanical Properties
| Grade | Tensile (MPa) | Yield (MPa) | Elongation (%) | Impact Energy (J @ -20°C) | Creep Strength (MPa @ 500°C) |
|---|---|---|---|---|---|
| 15Mo3 | 450–600 | ≥270 | 22 | 40 | 120 |
| 13CrMo44 | 520–670 | ≥310 | 18 | 35 | 180 |
| 19Mn6 | 540–700 | ≥355 | 20 | 45 | N/A (ambient temp use) |
Test methods:
- Tensile: DIN EN ISO 6892-1 (strain rate 0.006/min)
- Impact: DIN EN ISO 148-1 (Charpy V-notch, 10x10mm)
- Hardness: 160–220 HBW (Grade 15Mo3 normalized)
Performance Advantages
- High-Temperature Stability:
- Creep rupture life: 100,000 hours @ 550°C (13CrMo44)
- Oxidation resistance: ≤1.5 mm/year scaling @ 600°C
- Weldability:
- Preheat: 150–200°C (GTAW with ER90S-B3 filler)
- PWHT: 680–720°C (mandatory for Cr-Mo grades to avoid HAZ cracking)
- Cost Efficiency:
- 35% lower cost vs. 316L stainless steel in steam headers
- 20% thinner walls vs. carbon steel due to higher yield strength
- Corrosion Resistance:
- H₂S service: NACE MR0175 compliant for sour gas pipelines
- CO₂ corrosion rate: <0.1 mm/year with proper coatings
Applications
| Industry | Use Case | Recommended Grade |
|---|---|---|
| Power Plants | Superheater tubes (550°C, 25 MPa) | 13CrMo44 |
| Petrochemical | Hydrocracker reactors (450°C) | 15Mo3 |
| Oil & Gas | Sour gas separators | 19Mn6 |
Global Equivalents
| DIN 17155 | EN 10028 | ASTM | JIS G4053 | GB 5310 |
|---|---|---|---|---|
| 15Mo3 | 16Mo3 | SA-204 Gr. B | STPA12 | 15MoG |
| 13CrMo44 | 13CrMo4-5 | SA-387 Gr. 12 | STBA22 | 13CrMo44 |
| 19Mn6 | P355GH | SA-516 Gr. 70 | SPV355 | Q345R |
Sustainability & Compliance
- Recycled Content: 82% (certified per DIN EN 10025)
- RoHS Compliance: Lead-free, Cd <0.01%
- Certifications: AD 2000-Merkblatt W0, KOSHA PS001
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