DIN 17155 Pressure Vessel Steel Plates: High-Temperature Resistant Solutions for Petrochemical Reactors & Power Plant Boilers
Material Overview & Key Advantages
DIN 17155 specifies heat-resistant chromium-molybdenum steel plates for 550°C high-temperature service in power plants and chemical processing units. With grades like 15Mo3 and 13CrMo44, these normalized plates achieve tensile strengths up to 690 MPa (19Mn6) while maintaining creep resistance for critical pressure equipment.
Competitive Benefits:
- High-Temp Stability: 10,000h creep rupture strength of 100 MPa @ 500°C (13CrMo44).
- Global Equivalency: EN 10028-2 P355GH (19Mn6), ASTM A387 Gr.22 (10CrMo9-10).
- Cost Efficiency: 25% lower lifecycle cost vs. austenitic stainless steels.
Technical Specifications
1. Chemical Composition (DIN 17155:2023 Revision)
| Grade | C Range | Cr Range | Mo Range | Al Max | CEV* |
|---|---|---|---|---|---|
| 15Mo3 | 0.12–0.20% | ≤0.25% | 0.25–0.35% | 0.020% | 0.39 |
| 13CrMo44 | 0.08–0.18% | 0.70–1.10% | 0.40–0.60% | 0.020% | 0.51 |
| 19Mn6 | ≤0.20% | ≤0.30% | ≤0.08% | 0.020% | 0.43 |
*CEV = C + Mn/6 + (Cr + Mo + V)/5
2. Mechanical Properties
| Grade | Yield (MPa) | Tensile (MPa) | Elongation (%) | Impact (-20°C) |
|---|---|---|---|---|
| 15Mo3 | 270–320 | 450–600 | 22 | 40 J |
| 13CrMo44 | 310–360 | 510–660 | 20 | 35 J |
| 19Mn6 | 355–410 | 590–740 | 18 | 30 J |
Physical Properties:
- Thermal Conductivity: 43.5 W/m·K (20–500°C)
- Linear Expansion: 13.4 µm/m°C (25–400°C)
Manufacturing & Processing
1. Heat Treatment
- Normalizing: 920–950°C × 1h/30mm (mandatory for 13CrMo44).
- Stress Relieving: 580–650°C × 2hrs (AD 2000-W0 compliant).
2. Surface Finishing
| Process | Standard | Industrial Use Case |
|---|---|---|
| Hot-Dip Galvanizing | DIN EN ISO 1461 | Flue Gas Ducting Systems |
| Shot Blasting | SA 2.5 (DIN 55928) | Reactor Internals |
Industrial Applications
1. Power Generation
- Steam Drum Shells: 19Mn6 grade (thickness 40–120mm).
- Superheater Headers: 13CrMo44 with 2.5mm corrosion allowance.
2. Petrochemical Plants
| Component | Material Grade | Operational Limits |
|---|---|---|
| Hydrocrackers | 10CrMo9-10 | 540°C @ 18MPa |
| Catalytic Reactors | 15Mo3 | 450°C @ 12MPa |
3. Nuclear Infrastructure
- Containment Vessels: 19Mn6 (KTA 3201.2 certified).
- Auxiliary Piping: 15Mo3 (EN 13480-2 compliant).
Quality Compliance
- Testing Requirements:
- Ultrasonic Testing: DIN EN 10160 Class S3 for thickness >60mm.
- Hardness Testing: 180–220 HBW (13CrMo44 post-PWHT).
- Certifications:
- TÜV Rheinland AD 2000-W10 Approval.
- PED 2014/68/EU Annex II Module H.
Delivery & Storage
- Dimensions:
- Width: 1,500–3,500mm (max length: 20m).
- Thickness Tolerance: ±0.3mm (machined edges), ±1.2% (as-rolled).
- Packaging: VCI-coated + desiccant packs (18-month shelf life).
Welding Guidance: Use DIN 8575 SG-2Mo electrodes with 150–180°C preheat for 13CrMo44*
Technical Footnotes:
- 15Mo3 achieves 0.2% proof strength of 185 MPa @ 400°C.
- Maximum allowable stress: 125 MPa @ 375°C (TRD 301).
Why Choose DIN 17155?
Compared to ASTM A516 Gr.70, DIN 19Mn6 provides 22% higher creep resistance at 450°C while maintaining equivalent weldability. The molybdenum-chromium alloying (13CrMo44) offers 3x better sulfidation resistance in refinery environments.
Environmental Note: 88% recycled content in production (DIN 17001 compliant).
Global Material Equivalents:
| DIN 17155 | EN 10028-2 | ASTM | JIS | Application Focus |
|---|---|---|---|---|
| 15Mo3 | 16Mo3 | A204 Gr.B | SCMV 2 | Steam Piping Systems |
| 13CrMo44 | 13CrMo4-5 | A387 Gr.12 | SCMV 4 | Hydroprocessing Reactors |
| 19Mn6 | P355GH | A537 CL1 | SPV 355 | Cryogenic Storage Tanks |
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