Description
JIS G3106 High-strength steel for welded structures
JIS G3106 is a Japanese Industrial Standard that specifies hot-rolled carbon steel plates, sheets, and strip materials for welded structures. These steels are commonly used in construction, bridges, ships, and other structural applications where high strength and weldability are required.
Common Grades of JIS G3106 Steel
- SM400A, SM400B, SM400C – General structural steels with good weldability.
- SM490A, SM490B, SM490C – High-strength structural steels suitable for welded structures.
- SM520B, SM520C – Higher-strength steels with better mechanical properties.
- SM570 – A high-strength steel grade for heavy-duty structural applications.
JIS G 3106 Dimensions
SM400A steel plate dimensions
Thickness: 6–300 mm
Width: 1500–4050 mm
Length: 3000–27000 mm
Hot rolled steel plate dimensions
Thickness: 0.9–100 mm
Width: 900–2000 mm
Steel plate tolerances
Thickness: +/-0.5 mm
Width: +25/-0 mm
JIS G3106 Chemical Composition
| Grade | C (Max) | Si (Max) | Mn | P (Max) | S (Max) | Nb (Max) | V (Max) | Ti (Max) |
|---|---|---|---|---|---|---|---|---|
| SM400A | 0.23 | 0.35 | 0.60–1.40 | 0.035 | 0.035 | — | — | — |
| SM400B | 0.23 | 0.35 | 0.60–1.40 | 0.035 | 0.035 | — | — | — |
| SM400C | 0.20 | 0.35 | 0.60–1.40 | 0.030 | 0.030 | — | — | — |
| SM490A | 0.18 | 0.55 | 0.55–1.65 | 0.035 | 0.035 | 0.02 | 0.20 | 0.20 |
| SM490B | 0.18 | 0.55 | 0.55–1.65 | 0.035 | 0.035 | 0.02 | 0.20 | 0.20 |
| SM490C | 0.18 | 0.55 | 0.55–1.65 | 0.030 | 0.030 | 0.02 | 0.20 | 0.20 |
| SM520B | 0.20 | 0.55 | 1.30–1.60 | 0.035 | 0.035 | 0.02 | 0.20 | 0.20 |
| SM520C | 0.20 | 0.55 | 1.30–1.60 | 0.030 | 0.030 | 0.02 | 0.20 | 0.20 |
| SM570 | 0.18 | 0.55 | 1.60–2.00 | 0.030 | 0.030 | 0.02 | 0.20 | 0.20 |
JIS G3106 Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|
| SM400A | ≥245 | 400–510 | ≥21 |
| SM400B | ≥245 | 400–510 | ≥21 |
| SM400C | ≥245 | 400–510 | ≥21 |
| SM490A | ≥325 | 490–610 | ≥21 |
| SM490B | ≥325 | 490–610 | ≥21 |
| SM490C | ≥325 | 490–610 | ≥21 |
| SM520B | ≥390 | 520–640 | ≥20 |
| SM520C | ≥390 | 520–640 | ≥20 |
| SM570 | ≥450 | 570–720 | ≥17 |
JIS G3106 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm³) | 7.85 |
| Melting Point (°C) | 1420–1460 |
| Thermal Conductivity (W/m·K) | 45.0 |
| Specific Heat (J/kg·K) | 480 |
| Electrical Resistivity (Ω·m) | 1.59 × 10⁻⁷ |
Applications
- Bridges – Used in the fabrication of steel bridges due to its excellent strength and durability.
- Buildings & Skyscrapers – Ideal for high-rise structures, warehouses, and industrial buildings.
- Shipbuilding – Used in ship hulls and supporting structures due to its weldability and corrosion resistance.
- Oil & Gas Platforms – Suitable for offshore structures and drilling rigs requiring strong and reliable materials.
- Pressure Vessels – Used in the construction of boilers, storage tanks, and heat exchangers.
- Heavy Equipment & Machinery – Utilized in the manufacturing of cranes, excavators, and construction machinery.
Reviews
There are no reviews yet.