AISI 4140/42CrMo4 Hot Rolled Tube
AISI 4140/42CrMo4 Hot Rolled Tube
AISI 4140/42CrMo4 Hot Rolled Tube is a high-strength, low-alloy steel tube known for its excellent toughness, fatigue resistance, and good machinability. This material is widely used in demanding industrial applications requiring high mechanical strength and durability.
AISI 4140/42CrMo4 hot rolled tube is ideal for high-stress applications where strength, durability, and machinability are critical. Their versatility makes them a preferred choice in industries requiring reliable performance under extreme conditions.
Advantages
1. High Strength & Toughness: Excellent tensile and yield strength, suitable for heavy-duty applications.Superior Impact Resistance,performs well in dynamic and shock-loading conditions (e.g., drilling equipment, automotive axles).
2. Corrosion & Temperature Resistance: Moderate Corrosion Resistance:chromium provides better oxidation resistance than plain carbon steel.Often used with protective coatings (e.g., plating, painting) for harsh environments.Good High-Temperature Stability,retains strength up to 400–500°C, suitable for oil/gas and power plant components.
3. Cost-Effective for High-Performance Applications: AISI 4140/42CrMo4 hot rolled tube is more affordable than ultra-high-strength steels (e.g., maraging steels) while offering comparable strength.Longer service life reduces replacement frequency in industrial settings.
4. Good Machinability: Can be machined efficiently in annealed condition.Better than higher-alloy steels like AISI 4340.
5. Enhanced Fatigue & Wear Resistance: Improves resistance to wear, abrasion, and cyclic stresses.Ideal for components like gears, shafts, and hydraulic cylinders subjected to repeated stress.
6. Versatility: Suitable for a wide range of applications, including hydraulic cylinders, pneumatic cylinders, and precision engineering components.
| Parameter | Specification |
|---|---|
| ID Size | 20mm – 1500mm |
| Length | Max 16 meters |
| Type | Seamless, Hot Rolled |
| Straightness | ≤ 0.5mm per 1000mm |
| Packing | Bundle with steel strip |
Material Composition
| Element | AISI 4140 (ASTM) | 42CrMo4 (DIN/EN) |
|---|---|---|
| Carbon (C) | 0.38–0.43% | 0.38–0.45% |
| Chromium (Cr) | 0.80–1.10% | 0.90–1.20% |
| Molybdenum (Mo) | 0.15–0.25% | 0.15–0.30% |
| Manganese (Mn) | 0.75–1.00% | 0.60–0.90% |
| Silicon (Si) | 0.15–0.35% | 0.15–0.40% |
| Phosphorus (P) (max) | ≤0.035% | ≤0.025% |
| Sulfur (S) (max) | ≤0.040% | ≤0.035% |
| Iron (Fe) | Balance | Balance |
Mechanical Properties
| Property | Metric Units | Imperial Units |
|---|---|---|
| Tensile Strength | 850-1000 MPa | 123,000-145,000 psi |
| Yield Strength | 650-780 MPa | 94,000-113,000 psi |
| Elongation at Break | 12-18% | 12-18% |
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