1. Tensile Properties (ASTM A242 Corten A)
| Property | Requirement (Imperial) | Requirement (Metric) |
|---|---|---|
| Tensile Strength (min) | 70 ksi (kilopound per sq. in.) | 485 MPa (Megapascal) |
| Yield Strength (min) | 50 ksi | 345 MPa |
| Elongation (min) | 18% (in 8") | 18% (in 200mm) |
Notes:
Elongation is measured in a standard 8-inch (200mm) gauge length.
Yield strength is determined at 0.2% offset.
2. Comparison with Other Weathering Steels
| Grade | Tensile (MPa) | Yield (MPa) | Elongation (%) |
|---|---|---|---|
| Corten A (A242) | 485 min | 345 min | 18 min |
| Corten B (A588) | 485 min | 345 min | 18 min |
| S355J2W (EN) | 470-630 | 355 min | 20 min |
→ Corten A has similar tensile strength to Corten B (A588) but differs in alloy composition (higher Phosphorus for better patina formation).
3. Impact on Welding & Fabrication
High Tensile Strength means it can handle structural loads but requires preheating (100-150°C) for welding.
Low Elongation (vs. mild steel) means it's less ductile-avoid excessive cold bending.
4. Key Applications Using These Properties
Bridges & Highways (needs high yield strength for load-bearing).
Architectural Facades (relies on corrosion resistance + tensile strength).
Transmission Towers (resists wind/weather forces).
5. Testing & Certification
Mill Test Certificate (MTC) must confirm tensile values.
Common tests:
ASTM E8/E8M (Tensile Test)
ASTM A370 (Mechanical Testing of Steel Products)
Need a material cert for your project? Ask the supplier for ASTM A242-compliant MTC.
