JIS G3103 SB410 Boiler & Pressure Vessel Steel Plate
JIS G3103 SB410 Carbon Steel Plate for Boilers and Pressure Vessels | Properties, Equivalents, and Applications
Comprehensive data sheet for JIS G3103 SB410 carbon steel plate: chemical composition, mechanical and thermal properties, international equivalents, and application guidelines for boiler and pressure vessel fabrication.
Welding, bending, forming, machining, hot and cold working
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JIS G3103 SB410 Boiler & Pressure Vessel Steel Plate Introduction
SB410 is a carbon steel plate grade specified in Japanese Industrial Standard JIS G3103, intended for use in boilers and pressure vessels operating at moderate temperatures. It offers a balanced combination of strength, ductility, and weldability. Key features include:
- Minimum tensile strength of 410 MPa
- Good notch toughness at ambient and low temperatures
- Reliable performance under moderate pressure and thermal cycling
- Available in various thicknesses with controlled chemistry
The steel is typically supplied in the normalized or as-rolled condition, depending on thickness and customer requirements. It is widely used in power generation, chemical processing, and industrial equipment manufacturing.
JIS G3103 SB410 Boiler & Pressure Vessel Steel Plate Chemical Composition
The chemical composition of JIS G3103 SB410 is controlled to ensure adequate strength, weldability, and toughness. Silicon is intentionally added within a specified range for deoxidation. Phosphorus and sulfur are limited to minimize brittleness and hot cracking. Typical composition limits:
| Element | Standard Value | Remarks |
|---|---|---|
| Carbon (C) | ≤ 0.28 | Maximum |
| Silicon (Si) | 0.15 – 0.30 | Range; for killed steel, negotiable |
| Manganese (Mn) | ≤ 0.90 | Maximum |
| Phosphorus (P) | ≤ 0.035 | Maximum |
| Sulfur (S) | ≤ 0.040 | Maximum |
JIS G3103 SB410 Boiler & Pressure Vessel Steel Plate Thermal and Electrical Physical Properties
Physical properties are typical for carbon steel and are provided for general engineering calculations at room temperature unless otherwise noted. Values may vary slightly with composition and heat treatment.
| Property | Standard Value | Unit | Test Condition |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | 20 °C |
| Modulus of Elasticity (E) | 205 | GPa | 20 °C |
| Shear Modulus (G) | 80 | GPa | 20 °C |
| Poisson's Ratio (ν) | 0.29 | — | 20 °C |
| Coefficient of Thermal Expansion (α) | 11.5 × 10⁻⁶ | 1/K | 20–100 °C |
| Coefficient of Thermal Expansion (α) | 12.0 × 10⁻⁶ | 1/K | 20–200 °C |
| Coefficient of Thermal Expansion (α) | 13.0 × 10⁻⁶ | 1/K | 20–400 °C |
| Thermal Conductivity (λ) | 51.9 | W/(m·K) | 20 °C |
| Thermal Conductivity (λ) | 50.2 | W/(m·K) | 100 °C |
| Thermal Conductivity (λ) | 45.2 | W/(m·K) | 200 °C |
| Specific Heat Capacity (cₚ) | 486 | J/(kg·K) | 20 °C |
| Electrical Resistivity (ρ_e) | 0.18 | µΩ·m | 20 °C |
JIS G3103 SB410 Boiler & Pressure Vessel Steel Plate Mechanical Properties
Mechanical properties of SB410 plates are dependent on thickness and heat treatment condition. Values below represent minimum requirements for plates ≤50 mm thick in normalized or as-rolled condition (as per JIS G3103). Tensile testing is performed in the transverse direction unless otherwise agreed.
| Property | Standard Requirement | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (ReH) | ≥ 225 | MPa | Thickness ≤ 50 mm, ambient |
| Yield Strength (ReH) | ≥ 215 | MPa | 50 < thickness ≤ 100 mm |
| Yield Strength (ReH) | ≥ 205 | MPa | 100 < thickness ≤ 200 mm |
| Tensile Strength (Rm) | 410 – 550 | MPa | All thicknesses |
| Elongation (A) | ≥ 25 | % | No. 1A test piece, thickness ≤ 50 mm |
| Elongation (A) | ≥ 21 | % | No. 10 test piece, thickness ≤ 50 mm |
| Elongation (A) | ≥ 23 | % | No. 1A, 50 < t ≤ 100 mm |
| Elongation (A) | ≥ 19 | % | No. 10, 50 < t ≤ 100 mm |
| Elongation (A) | ≥ 21 | % | No. 1A, 100 < t ≤ 200 mm |
| Elongation (A) | ≥ 17 | % | No. 10, 100 < t ≤ 200 mm |
| Bend Test (Mandrel Diameter) | 1.5t (bend 180°) | — | t = specimen thickness, no cracking |
| Charpy Impact (KV₂) | ≥ 27 (average) | J | 0 °C, V-notch, transverse, thickness > 12 mm (optional, if specified) |
JIS G3103 SB410 Boiler & Pressure Vessel Steel Plate Exact Equivalent Material Standards and Replaceable Grades
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| China | GB/T 713 | Q245R | Equivalent carbon steel for boilers and pressure vessels; formerly 20g |
| United States | ASTM A285/A285M | Grade C | Low/intermediate tensile strength carbon steel plates for pressure vessels |
| European Union | EN 10028-2 | P265GH | Pressure vessel carbon steel with similar tensile range; also available as P235GH for lower strength |
| International | ISO 2604-2 | P26 | Matches SB410 tensile range and chemical limits |
JIS G3103 SB410 Boiler & Pressure Vessel Steel Plate Application Introduction
SB410 plates are primarily used in the fabrication of welded boilers and pressure vessels designed for service at temperatures up to about 400°C. The steel is easily weldable with all common arc welding processes, and no preheating is generally required for thin sections. Post-weld heat treatment (PWHT) is recommended for thick plates or when service conditions demand stress relief. Suitable cutting methods include plasma, laser, and oxy-fuel. The material can be hot or cold formed; hot forming is preferred for tight radii to avoid strain aging.
Product Applications: Steam boilers and drums, Pressure vessels and reactors, Heat exchangers and condensers, Process columns and separators, Storage tanks for moderate pressure, Industrial piping and headers
Processed into products: Boiler shells and end plates, Flanges and dished heads, Tube sheets for heat exchangers, Baffles and support plates, Nozzle reinforcements, Rings and stiffeners, Blind flanges and blanking plates
Application industries: Power generation, Oil and gas, Chemical processing, Petrochemical, Industrial equipment manufacturing
JIS G3103 SB410 Boiler & Pressure Vessel Steel Plate Similar / Alternative Material Recommendations
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| Japan | JIS G3103 | SB450 | Higher tensile strength version (450–590 MPa), with slight chemistry adjustments |
| Japan | JIS G3103 | SB480 | Even higher strength grade for thicker sections or higher design stress |
| China | GB/T 713 | Q345R | Mn-added carbon steel providing higher strength; requires PQR for welding procedure |
| European Union | EN 10028-2 | P295GH | Higher tensile strength range, suitable when 410 MPa minimum is insufficient |
| United States | ASTM A516/A516M | Gr. 60 | Similar tensile strength (415–550 MPa) with better notch toughness for moderate/low temperatures |
Notes:
Special requirements:
- SB410 can be supplied with Charpy impact testing at 0°C, -10°C, or lower if agreed upon.
- Ultrasonic examination to detect internal defects is often specified according to JIS G0801 or EN 10160.
- Simulated post-weld heat treatment properties (e.g., for PWHT at 620°C) should be verified by the manufacturer.
- Such plates are also available under JIS G3103 with the suffix 'S' for higher surface quality when required for lamination-sensitive applications.
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