1. Key Properties
AISI/SAE 4140 Forged (F) is a high-strength chromium-molybdenum alloy steel that undergoes the forging process to enhance its mechanical properties. Forging improves the grain structure, resulting in better toughness, strength, and resistance to impact and fatigue. This alloy is particularly known for its excellent hardenability, making it ideal for heavy-duty applications that require high strength and performance under extreme conditions. After heat treatment, AISI/SAE 4140 provides superior wear resistance, fatigue strength, and toughness, making it an excellent choice for high-load, high-stress environments.
2. Applications/Industries
Automotive (e.g., crankshafts, axles, gears)
Aerospace (e.g., landing gears, structural components)
Industrial Machinery (e.g., shafts, spindles, tooling)
Oil & Gas Equipment (e.g., pumps, drilling components)
Power Transmission Components (e.g., couplings, gears)
Heavy Equipment
3. Certifications/Standards
Meets ASTM A29 standards
Meets SAE 4140 specifications
ISO 9001 certified
4. Chemical Composition
Carbon (C): 0.38–0.43%
Manganese (Mn): 0.60–0.90%
Chromium (Cr): 0.80–1.10%
Molybdenum (Mo): 0.15–0.25%
Phosphorus (P): ≤ 0.035%
Sulfur (S): ≤ 0.04%
5. Technical Specifications
Yield Strength: 950–1100 MPa (depending on heat treatment)
Tensile Strength: 1100–1300 MPa
Hardness: 250–300 HB (Brinell Hardness)