Precision Machining for High-Strength Engineering Applications
Unlock the potential of AISI 4340 alloy steel with our advanced CNC machining services. We deliver robust, fatigue-resistant, and high-performance components for demanding industries.
AISI 4340 is a low-alloy, high-strength steel renowned for its toughness, ductility, and fatigue resistance. It is widely used in critical structural applications where high strength and impact resistance are essential. The alloy's versatility makes it a top choice for aerospace, automotive, and heavy machinery industries.
| Element | Content |
|---|---|
| Carbon (C) | 0.38–0.43% |
| Manganese (Mn) | 0.60–0.80% |
| Silicon (Si) | 0.15–0.30% |
| Chromium (Cr) | 0.70–0.90% |
| Nickel (Ni) | 1.65–2.00% |
| Molybdenum (Mo) | 0.20–0.30% |
| Phosphorus (P) | ≤0.035% |
| Sulfur (S) | ≤0.040% |
Landing gear, engine shafts, and structural components requiring high strength and toughness.
Crankshafts, gears, and drive shafts for performance and heavy-duty vehicles.
Press rams, axles, and high-stress machine parts.
Drill collars, tool joints, and downhole equipment.
AISI 4340 can be precisely machined using advanced CNC equipment. The alloy responds well to turning, milling, drilling, and grinding, especially after proper heat treatment. Our facility is equipped for tight-tolerance, high-complexity parts, and we offer surface treatments such as nitriding, carburizing, and induction hardening for enhanced performance.
We adhere to strict quality standards, including ISO 9001:2015 and AS9100D. All AISI 4340 parts undergo rigorous inspection, material traceability, and mechanical property verification. Non-destructive testing (NDT) and full documentation are available upon request.
AISI 4340 Alloy Steel FAQ
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