DIN 17100 St70-2 Steel Plate | St70-2 Structural Steel
What is DIN 17100 St70-2 Steel Plate?
As a professional steel plate supplier and China Mill-Direct Exporter, SHH STEEL is pleased to present DIN 17100 St70-2 Steel Plate.
St70-2 is a high-strength non-alloy structural steel under the former German standard DIN 17100. It provides a minimum yield strength of 365 MPa (for thickness ≤ 16 mm) and a tensile strength range of 690–900 MPa. This is the highest strength grade commonly available under DIN 17100 and is designed for heavily loaded welded structures that require elevated load-bearing capacity. Although the standard has been largely replaced by EN 10025, St70-2 is still requested in certain markets.
This grade belongs to the DIN 17100 Steel Plate series. SHH STEEL supplies St70-2 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 mill capability), 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 | DIN 17100 | Full compliance |
| Steel Grade | St70-2 (1.0070) | Confirmed |
| Delivery Condition | As-rolled / Normalized | 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
Chemical composition according to DIN 17100 (typical values):
| Element | Ladle Analysis (Max. %) | Product Analysis (Max. %) |
|---|---|---|
| Carbon (C) | ≤ 0.20 | ≤ 0.22 |
| Silicon (Si) | ≤ 0.55 | ≤ 0.60 |
| Manganese (Mn) | ≤ 1.60 | ≤ 1.70 |
| Phosphorus (P) | ≤ 0.045 – 0.050 | ≤ 0.055 |
| Sulfur (S) | ≤ 0.045 – 0.050 | ≤ 0.055 |
| Nitrogen (N) | ≤ 0.009 | ≤ 0.010 |
Note: Controlled carbon content is critical to maintain acceptable weldability at this high strength level.
Mechanical Properties
Mechanical properties of DIN 17100 St70-2:
| Thickness (mm) | Yield Strength ReH (min) | Tensile Strength Rm | Elongation A (min) |
|---|---|---|---|
| ≤ 16 | 365 MPa | 690 – 900 MPa | 14% |
| > 16 ≤ 40 | 355 MPa | 690 – 900 MPa | 13% |
| > 40 ≤ 63 | 345 MPa | 690 – 900 MPa | 12% |
| > 63 ≤ 100 | 335 MPa | 690 – 900 MPa | 11% |
Density: 7.85 g/cm³ Impact Test: Typically 27 J at +20°C (when required).
Delivery Conditions
SHH STEEL supplies DIN 17100 St70-2 steel plate as Mill Direct Supply in as-rolled or normalized 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 St70-2 steel plate follow DIN standards 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
St70-2 is a high-strength structural steel. Successful welding requires careful control of preheating, heat input and the use of low-hydrogen high-strength consumables.
Recommended welding consumables:
| Welding Process | Recommended Consumables |
|---|---|
| SMAW (Stick) | E9018, E10018 |
| GMAW (MIG/MAG) | ER90S-D2, ER100S-G |
| FCAW | E91T1, E101T1 |
| SAW | Matching high-strength wire and flux |
Preheating is generally required, especially for thicker plates. Interpass temperature must be strictly controlled.
Equivalent Material Grades
| Grade | Standard | Notes |
|---|---|---|
| St70-2 | DIN 17100 | — |
| 1.0070 | DIN / EN | Material number |
| S460N / S460M | EN 10025-3 / EN 10025-4 | Approximate modern equivalents |
| Q460C / Q460D | GB/T 1591 | Closest Chinese equivalents |
| ASTM A572 Grade 65 | ASTM | Approximate American equivalent |
| SM570 | JIS G3106 | Approximate Japanese grade |
Applications
DIN 17100 St70-2 is used in high-strength structural and engineering applications where elevated load capacity is required. Typical uses include:
| Application Area | Typical Components / Uses (Keywords) |
|---|---|
| Building Structures | Heavy beams, columns, frames – St70-2 Structural Steel |
| Bridges | Main girders, high-load components – St70-2 Bridge |
| Machinery | Heavy frames, supports – St70-2 Machinery |
| Crane & Lifting Equipment | Boom structures, frames – St70-2 Crane |
| General Fabrication | High-strength welded structures – St70-2 Fabrication |
| Construction | Structural parts – St70-2 Construction |
Why Choose SHH STEEL
SHH STEEL provides St70-2 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 DIN 17100 St70-2 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 is the strength level of St70-2?St70-2 has a minimum yield strength of 365 MPa (≤16 mm) and tensile strength of 690–900 MPa, making it the highest strength grade in the standard DIN 17100 series.
- Is St70-2 difficult to weld?St70-2 requires more careful welding procedures than lower strength grades, including preheating and low-hydrogen consumables, but it remains weldable with proper techniques.
Conclusion
DIN 17100 St70-2 Steel Plate from SHH STEEL is a high-strength structural steel offering 365 MPa minimum yield strength and 690–900 MPa tensile strength. As Mill Direct Supply, we provide competitive pricing, consistent quality and full technical support. Trust SHH STEEL for your St70-2 steel plate requirements.
Contact SHH STEEL today for stock availability, pricing and technical support. DIN 17100 St70-2 Steel Plate, St70-2 steel plate, St70-2, St70-2 Structural Steel, St70-2 supplier, St70-2 equivalent
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