JIS G3106 SM520B Steel Plate | SM520B Mill Direct Supply
What i JIS G3106 SM520B Steel Plate ?
As a professional steel plate supplier and China Mill-Direct Exporter, SHH STEEL is pleased to present JIS G3106 SM520B Steel Plate.
SM520B is a rolled steel for welded structures under the Japanese Industrial Standard JIS G3106. It provides a minimum yield strength of 365 MPa (for thickness ≤ 16 mm) and a tensile strength range of 520–640 MPa. The “B” designation requires Charpy impact testing at 0°C with a minimum energy of 27 J. This grade offers higher strength than the SM490 series and is widely used in bridges, buildings and heavy welded structures requiring both strength and moderate toughness.
This grade belongs to the JIS G3106 STEEL PLATE series. SHH STEEL supplies SM520B as Mill Direct Supply, sourcing directly from major Chinese steel mills. This ensures competitive mill pricing, consistent quality, shorter lead times and full traceability. We offer thicknesses from 6 mm to 100 mm (subject to standard limitations), widths up to 3000–4000 mm and lengths up to 12000–18000 mm. Custom cutting, shot blasting and priming services are available. All plates are delivered with full Mill Test Certificates (EN 10204 3.1 or equivalent).
Material Specification
| Specification Element | Requirement | SHH STEEL Compliance |
|---|---|---|
| Primary Standard | JIS G3106 | Full compliance |
| Steel Grade | SM520B | Confirmed |
| Delivery Condition | As-rolled / Normalized / TMCP | Available |
| Product Form | Steel Plate | Available |
| Thickness Range | 6 mm – 100 mm (typical) | Custom sizes available |
| Width / Length | Up to 3000–4000 mm / 12000–18000 mm | Custom cutting supported |
| Certification | EN 10204 3.1 / Mill Certificate | Available |
Chemical Composition
Mechanical properties of JIS G3106 SM520B:
| Thickness (mm) | Yield Strength ReH (min) | Tensile Strength Rm | Elongation A (min) | Impact Energy KV (min) |
|---|---|---|---|---|
| ≤ 16 | 365 MPa | 520 – 640 MPa | 19% / 15%* | 27 J at 0°C |
| > 16 ≤ 40 | 355 MPa | 520 – 640 MPa | 19% / 15%* | 27 J at 0°C |
| > 40 ≤ 75 | 335 MPa | 520 – 640 MPa | 19% / 15%* | 27 J at 0°C |
| > 75 ≤ 100 | 325 MPa | 520 – 640 MPa | 15% | 27 J at 0°C |
*Elongation values depend on test specimen size according to JIS G3106. Density: 7.85 g/cm³
Delivery Conditions
SHH STEEL supplies JIS G3106 SM520B steel plate as Mill Direct Supply in as-rolled, normalized or thermomechanically rolled condition according to customer requirements.
Additional options available:
- Shot blasting and shop primer
- Ultrasonic testing (EN 10160 or equivalent)
- Z-direction testing (Z15 / Z25 / Z35)
- Third-party inspection (SGS, BV, TUV, etc.)
Tolerances
Dimensional tolerances for SM520B steel plate follow JIS G3193 or equivalent international standards (EN 10029 / ASTM A6).
- Thickness, width and length tolerances according to the ordered class.
- Flatness according to applicable standard.
- Edge conditions: Mill edge or cut edge (flame / plasma).
Tighter tolerances can be provided upon request.
Weldability
SM520B has good weldability for a higher-strength structural steel. It can be welded by conventional methods (SMAW, GMAW, FCAW, SAW) when proper procedures are followed.
Recommended welding consumables:
| Welding Process | Recommended Consumables |
|---|---|
| SMAW (Stick) | E8018, E7018 |
| GMAW (MIG/MAG) | ER80S-D2, ER70S-6 |
| FCAW | E81T1, E71T-1 |
| SAW | EH14 / EM12K + suitable flux |
Preheating is generally recommended for thicker plates. Low-hydrogen consumables are preferred.
Equivalent Material Grades
| Grade | Standard | Notes |
|---|---|---|
| SM520B | JIS G3106 | — |
| Q390B / Q390C | GB/T 1591 | Closest Chinese equivalents |
| S355J0 / S420N | EN 10025-2 / EN 10025-3 | Approximate European grades |
| ASTM A572 Grade 55 | ASTM | Approximate American equivalent |
| SM520 | JIS G3106 | Related grades |
Applications
JIS G3106 SM520B is widely used in higher-strength welded structures requiring moderate toughness. Typical applications include:
| Application Area | Typical Components / Uses (Keywords) |
|---|---|
| Building Structures | Beams, columns, frames – SM520B Structural Steel |
| Bridges | Main girders, components – SM520B Bridge |
| Machinery | Heavy frames, supports – SM520B Machinery |
| Containers & Storage | Tanks, containers – SM520B Container |
| General Fabrication | High-strength welded structures – SM520B Fabrication |
| Shipbuilding & Offshore | Structural parts requiring toughness – SM520B Shipbuilding |
Why Choose SHH STEEL
SHH STEEL provides SM520B as Mill Direct Supply. We maintain long-term strategic cooperation with major Chinese steel mills and act as a first-level (primary) agent. This direct mill supply model allows us to offer competitive mill-direct pricing, faster delivery times, stable and traceable quality, and full Mill Test Certificates for JIS G3106 SM520B Steel Plate.
Customers benefit from reliable supply, short lead times and cost-effective solutions for high-strength structural steel projects worldwide. Our professional export team provides technical support and customized processing services to meet project requirements.
FAQ
- What does the “B” in SM520B mean?The “B” indicates that Charpy impact testing is required at 0°C with a minimum average energy of 27 J.
- What is the difference between SM490B and SM520B?SM520B has higher tensile strength (520–640 MPa vs 490–610 MPa) and the same yield strength level in thinner plates, making it suitable for applications requiring higher tensile performance.
- Is SM520B equivalent to ASTM A572 Grade 55?Yes, SM520B is commonly considered an approximate equivalent to ASTM A572 Grade 55 for structural applications.
Conclusion
JIS G3106 SM520B Steel Plate from SHH STEEL is a high-strength weldable structural steel offering 365 MPa minimum yield strength, 520–640 MPa tensile strength and guaranteed impact toughness at 0°C. As Mill Direct Supply, we provide competitive pricing, consistent quality and full technical support. Trust SHH STEEL for your SM520B steel plate requirements.
Contact SHH STEEL today for stock availability, pricing and technical support. JIS G3106 SM520B Steel Plate, SM520B steel plate, SM520B, SM520B Mill Direct Supply, SM520B supplier, SM520B equivalent
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