JIS G3103 Pressure Vessel Carbon Steel Coil: High-Strength Alloy for Boilers & Petrochemical Systems
JIS G3103 P296GH/P355GH/P235GH Pressure Vessel Carbon Steel Coil Product Overview
JIS G3103 is a carbon-molybdenum steel designed for boilers, pressure vessels, and high-temperature pipelines operating at -10°C to 450°C. Available in grades like SB410, SB480M, and P355GH, it combines elevated temperature strength with weldability, meeting EN 10028-2 P355GH and ASME SA-516 standards. Ideal for power plants and oil refineries, it replaces costlier alloys in steam drums, heat exchangers, and hydrogen reactors.
Key Technical Specifications
1. Manufacturing & Dimensional Tolerances
- Process:
- Hot-rolled: 2.75–100mm (±1.2% thickness tolerance per JIS G3193)
- Cold-rolled: 0.2–3mm (±0.25% tolerance for precision forming)
- Width: 45–2,200mm (compatible with CNC machining for flanges/nozzles)
- Surface: Pickled (EP coating) or galvanized (Z275) for corrosion resistance
2. Chemical Composition
| Grade | C (%) | Mn (%) | Si (%) | Mo (%) | Key Alloy Features |
|---|---|---|---|---|---|
| SB410 | 0.24–0.30 | 0.90 max | 0.15–0.40 | – | Cost-effective for moderate loads |
| SB480M | 0.27 max | 0.98 max | 0.45 max | 0.45–0.60 | Mo-enhanced creep resistance |
| P355GH | 0.20 max | 1.40 max | 0.60 max | 0.25 max | EN-standardized for EU markets |
Trace elements:
- P/S: ≤0.030% (SB410), ≤0.025% (SB480M)
- Al: ≥0.020% for grain refinement
Mechanical Properties
| Grade | Tensile (MPa) | Yield (MPa) | Elongation (%) | Impact Energy (J @ -20°C) | Hardness (HBW) |
|---|---|---|---|---|---|
| SB410 | 410–550 | ≥225 | 21 | 40 | 130–180 |
| SB480M | 480–620 | ≥275 | 17 | 35 | 160–210 |
| P355GH | 490–630 | ≥355 | 22 | 45 | 170–220 |
Test methods:
- Tensile: JIS Z2241 (strain rate 0.006/min)
- Impact: JIS Z2202 (Charpy V-notch, 10x10mm)
- Hardness: JIS Z2243 (Brinell)
Performance Advantages
- High-Temperature Stability:
- Creep strength: 120 MPa @ 400°C (SB480M)
- Oxidation resistance: ≤2.0 mm/year scaling @ 450°C
- Weldability:
- Preheat: 100–150°C (GMAW with JM-58 filler wire)
- PWHT: 600–650°C (mandatory for SB480M to prevent HAZ cracking)
- Cost Efficiency:
- 25% lower cost vs. 316L stainless steel in heat exchangers
- 15% thinner walls vs. SS400 carbon steel due to higher yield strength
- Corrosion Resistance:
- H₂S service: NACE MR0175 compliant for sour gas pipelines
- CO₂ corrosion rate: <0.2 mm/year with proper coatings
Applications
| Industry | Use Case | Recommended Grade |
|---|---|---|
| Power Plants | Steam drums (350°C, 10 MPa) | SB480M |
| Petrochemical | Hydrogenation reactors | P355GH |
| Manufacturing | Industrial boilers | SB410 |
Global Equivalents
| JIS G3103 | EN 10028 | ASTM | DIN 17155 | GB 713 |
|---|---|---|---|---|
| SB410 | P235GH | SA-285 Gr. C | 17Mn4 | Q245R |
| SB480M | P355GH | SA-537 Cl.1 | 19Mn6 | Q345R |
| P355GH | P355GH | SA-516 Gr.70 | 15Mo3 | 16Mo3 |
Sustainability & Compliance
- Recycled Content: 80% (certified per JIS G3116)
- RoHS Compliance: Lead-free, Cd <0.01%
- Certifications: TÜV Rheinland, KHK (High-Pressure Gas Safety Act)
Packing And Delivery
