AISI/SAE 4140 Cold Drawn (CD) is a chromium-molybdenum alloy steel known for its high strength, excellent hardness, and good toughness. The cold drawing process improves its dimensional accuracy and surface finish, providing a smoother, more precise bar compared to hot-rolled products. After heat treatment, AISI/SAE 4140 offers exceptional wear resistance, making it ideal for high-stress applications where strength, toughness, and fatigue resistance are critical.
2. Applications/Industries
Automotive (e.g., gears, shafts, crankshafts)
Aerospace (e.g., landing gears, structural components)
Industrial Machinery
Power Transmission Components (e.g., axles, spindles)
Heavy Equipment
Oil & Gas Equipment
Construction 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: 850–1000 MPa (depending on heat treatment)
Tensile Strength: 1000–1200 MPa
Hardness: 250–300 HB (Brinell Hardness)