AISI 4130 Round Bars
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AISI 4130 is a low-alloy steel containing chromium and molybdenum, which provide it with excellent strength, toughness, and resistance to wear. It is known for its versatility and is widely used in the aerospace, automotive, and oil and gas industries. AISI 4130 is commonly used for manufacturing structural tubing, high-strength fasteners, gears, and aircraft parts. Its ability to be heat-treated enhances its mechanical properties, making it a preferred choice for components that require a high strength-to-weight ratio.
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| Property | Specification |
|---|---|
| Standard | AISI 4130, ASTM A29, ASTM A519, SAE J404 |
| Chemical Composition | C: 0.28-0.33%, Mn: 0.40-0.60%, P: ≤0.035%, S: ≤0.040%, Si: 0.15-0.35%, Cr: 0.80-1.10%, Mo: 0.15-0.25% |
| Tensile Strength (MPa) | 930 - 1080 MPa (in QT condition) |
| Yield Strength (MPa) | 760 - 850 MPa (in QT condition) |
| Elongation (%) | 12-15% (in QT condition) |
| Hardness (HBW) | 248 - 302 HB (in QT condition) |
| Modulus of Elasticity (GPa) | 205 - 210 GPa |
| Density (g/cm³) | 7.85 g/cm³ |
| Thermal Conductivity (W/m·K) | 42.7 W/m·K (at 20°C) |
| Specific Heat Capacity (J/kg·K) | 477 J/kg·K (at 20°C) |
| Heat Treatment | Quenched and Tempered (QT), Normalized, or Annealed |
| Applications | Structural tubing, aircraft components, gears, high-strength fasteners, and automotive parts where high strength and toughness are critical |
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