SAE J1392 is a standard set by the Society of Automotive Engineers (SAE) for high-strength, low-alloy (HSLA) steel sheets and strips used in cars. It details the mechanical properties and chemical composition these materials need to meet to ensure they perform well in automotive applications. HSLA steels are strong yet lightweight, making them perfect for car parts that need to be durable but not too heavy. This standard helps ensure that the materials used are consistent in quality and can be formed into various shapes needed for car manufacturing.
This SAE Recommended Practice covers seven levels of high strength carbon and low-alloy hot rolled sheet and strip, cold rolled sheet, and coated sheet steels. The strength is achieved through chemical composition and special processing.
| Element | Composition Range |
| Carbon (C) | 0.02% to 0.15% |
| Manganese (Mn) | 0.30% to 1.60% |
| Phosphorus (P) | Maximum 0.025% |
| Sulfur (S) | Maximum 0.025% |
| Silicon (Si) | 0.10% to 0.60% |
| Property | Description |
| Yield Strength | Specifies different grades of HSLA steel with varying yield strengths, typically ranging from 210 MPa (30 ksi) to 550 MPa (80 ksi). This range allows manufacturers to choose the appropriate grade based on the specific strength requirements of the component. |
| Formability | Despite their high strength, HSLA steels under SAE J1392 are designed to maintain good formability. This enables them to be easily shaped into complex parts without cracking or losing their mechanical properties. |
| Grade | Yield Strength (MPa) | Yield Strength (ksi) | Tensile Strength (MPa) | Tensile Strength (ksi) |
| 040XLF | 240 | 35 | ~340 | 50 |
| 045XLF | 310 | 45 | ~450 | 65 |
| 050XLF | 340 | 50 | ~480 | 70 |
| 055XLF | 380 | 55 | ~520 | 75 |
| 060XLF | 410 | 60 | ~550 | 80 |
| 065XLF | 450 | 65 | ~590 | 8 |
| Standard | Equivalent Specification |
|---|---|
| SAE (Society of Automotive Engineers) | SAE J1392 |
| ASTM (American Society for Testing and Materials) | ASTM A1011/A1011M: Hot-Rolled Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, and Ultra-High Strength Steel Sheet and Strip |
| ASTM A653/A653M: Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process | |
| EN (European Norm) | EN 10111: Continuously hot-rolled low carbon steel sheet and strip for cold forming |
| EN 10025-2: Hot-rolled products of structural steels. Technical delivery conditions for non-alloy structural steels | |
| JIS (Japanese Industrial Standards) | JIS G3101: Rolled steels for general structure |
| Standard | Equivalent Specification |
|---|---|
| SAE (Society of Automotive Engineers) | SAE J1392 |
| ASTM (American Society for Testing and Materials) | ASTM A1011/A1011M: Hot-Rolled Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, and Ultra-High Strength Steel Sheet and Strip |
| DIN EN 10111: Continuously hot-rolled low carbon steel sheet and strip for cold forming |
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