4130
AISI 4130 is a chromium-molybdenum alloy steel offering good strength, weldability, and toughness. It is commonly supplied in normalized or heat-treated condition.
The alloy is widely used in pressure vessels, structural tubing, automotive parts, and aircraft components.
Specifications
- UNS: G41300
- ASTM: A29, A322
- EN/DIN: 1.7218
- Structure: Alloy Steel (Cr-Mo)
- Condition Supplied: Normalized/Heat Treated
Data Tables
Chemical Composition:
| C | Mn | P | S | Si | Cr | Ni | Ti | Mo | N | Cu | Fe | Co | Nb (+Ta) | V | W | Al | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | 0.28 | 0.4 | 0.15 | 0.8 | 0.15 | ||||||||||||
| Max | 0.33 | 0.6 | 0.035 | 0.04 | 0.35 | 1.1 | 0.25 | Bal |
Mechanical Properties:
| Material Grade | ASTM Standard | Desgnation(EN /UNS) | Yield Strength (MPa) | Yield Strength (KSI) | Tensile Strength (MPa) | Tensile Strength (KSI) | Elongation (%) | Reduction of Area (%) | Hardness(HRC/HBWMax) | Condition | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| AISI 4130 | ASTM A29 / A322 | EN 1.7218 | 435 | 63.09153 | 620 | 89.92356 | 25 | 45 | ≈197 HB | Normalized |
Physical Properties:
| Material Grade | Density (g/cm³) | Melting Range (°C) | Modulus of Elasticity (GPa) | Thermal Conductivity (W/m·K) | Thermal Expansion (×10⁻⁶ /°C) | Electrical Resistivity (µΩ·m) | Magnetic Behavior |
|---|---|---|---|---|---|---|---|
| AISI 4130 | 7.85 | 1430 | 205 | 42.7 | 12.2 | 0.23 | Magnetic |
Key Features
- Good strength-to-weight ratio
- Excellent weldability
- Good toughness and fatigue resistance
- Good response to heat treatment
- Suitable for dynamic loading
Applications
- Pressure vessels
- Structural tubing
- Automotive and aircraft components
- Oil and gas equipment
- Welded mechanical structures