ST37 is a German-origin carbon structural steel grade defined by the DIN 17100 standard. It is one of the most recognized carbon steel grades worldwide, equivalent to S235JR (EN 10025-2) and Q235B (GB/T 700). ST37 carbon steel plate offers reliable mechanical properties, excellent weldability, and cost-effectiveness for general structural applications. Huaxia-Steel supplies ST37 carbon steel plate with full mill certification and factory-direct export pricing.
Product Overview
ST37 steel plates are produced as hot-rolled products with a fine-grained microstructure. The grade designation “St” stands for “Stahl” (steel) and “37” indicates a minimum tensile strength of 370 MPa. The grade has two sub-grades: St37-2 (general structural) and St37-3 (with improved atmospheric corrosion resistance).
Key properties of ST37 carbon steel plate:
- Minimum yield strength: 235 MPa (t ≤ 16mm)
- Tensile strength: 360–510 MPa
- Excellent weldability — no preheating required for sections up to 25mm
- Good machinability and formability
- Equivalent to S235JR, Q235B, SS400, and A36 (with verification)
Specification Table
| Parameter | Specification |
|---|---|
| Standard | DIN 17100 / EN 10025-2 (S235JR) |
| Thickness | 3.0 – 150.0 mm |
| Width | 1,000 – 3,000 mm |
| Length | 3,000 – 12,000 mm |
| Thickness Tolerance | Class B (EN 10029): ±0.20mm (t≤8), ±0.40mm (8 |
| Flatness Tolerance | Class N (EN 10029): ≤ 4mm/m (t≤25), ≤ 3mm/m (t>25) |
| Surface Finish | Hot-rolled (default), pickled, or shot-blasted primed |
Mechanical Properties
| Thickness (mm) | Yield (MPa) | Tensile (MPa) | Elongation (%) | Impact (J, 20°C) |
|---|---|---|---|---|
| ≤ 16 | ≥ 235 | 360–510 | ≥ 26 | ≥ 27 |
| 16 – 40 | ≥ 225 | 360–510 | ≥ 25 | ≥ 27 |
| 40 – 63 | ≥ 215 | 360–510 | ≥ 24 | ≥ 27 |
| 63 – 80 | ≥ 205 | 360–510 | ≥ 23 | ≥ 27 |
| 80 – 100 | ≥ 195 | 360–510 | ≥ 22 | ≥ 27 |
Chemical Composition (Ladle Analysis)
| Grade | C (max) | Si (max) | Mn (max) | P (max) | S (max) | N (max) |
|---|---|---|---|---|---|---|
| St37-2 | 0.21 | — | 1.40 | 0.045 | 0.045 | 0.009 |
| St37-3 | 0.19 | 0.50 | 1.40 | 0.040 | 0.040 | 0.009 |
Available Grades & Equivalents
| Designation | Standard | Equivalent | Notes |
|---|---|---|---|
| St37-2 | DIN 17100 | S235JR (EN 10025-2) | Most common, general structural |
| St37-3 | DIN 17100 | S235J0/J2 (EN 10025-2) | Improved weathering resistance |
| Q235B | GB/T 700 | Chinese equivalent | Cross-reference MTC available |
| SS400 | JIS G 3101 | Japanese equivalent | Close chemistry match |
| A36 | ASTM A36 | US equivalent | Slightly higher yield (250 MPa) |
Manufacturing Standards
- DIN 17100 (1980): Original German standard for general structural steels (now superseded by EN 10025-2, but still widely referenced)
- EN 10025-2: Current European standard for hot-rolled non-alloy structural steels
- EN 10029: Thickness and flatness tolerances for hot-rolled steel plates
- EN 10164: Steel products with improved deformation properties perpendicular to the surface (Z-quality)
Applications
- Structural steelwork: Beams, columns, and bracing for industrial buildings
- General fabrication: Machine bases, brackets, supports, and housings
- Construction: Reinforcement plates, connection plates, and base plates
- Pipe manufacturing: Plate for welded pipe and tube production
- Pressure equipment: Non-critical tanks, silos, and storage vessels (with appropriate certification)
- Shipbuilding: Internal structural members and non-load-critical components
Quality Assurance
- Mill test certificate: EN 10204 3.1 MTC with ladle analysis and mechanical test results
- Heat traceability: Each plate marked with heat number, grade, and dimensions
- Non-destructive testing: Ultrasonic testing per EN 10160 (on request)
- Impact testing: Charpy V-notch at 20°C (St37-2) or 0°C/-20°C (St37-3)
- Surface inspection: Visual examination for cracks, scars, and surface defects per EN 10163
- Third-party inspection: SGS, BV, TÜV inspection available
Packaging & Shipping
- Plates stacked on wooden pallets or steel frames with steel strapping
- Metal or plastic end protectors available for cut-to-size plates
- Anti-corrosion options: black paint, rust-preventive oil, or VCI packaging
- Container loading: up to 28 tons per 20ft container, 30 tons per 40ft container
- Custom cutting: flame, plasma, or laser cutting to exact dimensions
- Export documentation: Invoice, packing list, MTC, CO (Certificate of Origin) if required
Request a Quote
Huaxia-Steel provides ST37 carbon steel plate with DIN/EN certification, competitive factory-direct pricing, and reliable delivery schedules. Contact us today with your specifications for a detailed quotation. Visit our carbon steel product catalog to explore additional grades and products.
