1. Key Properties
AISI/SAE 4140 is a low-alloy steel with high strength, toughness, and excellent wear resistance. The material is known for its good machinability, hardness, and versatility in high-stress applications. When heat-treated, 4140 steel offers enhanced fatigue resistance and impact strength. It is particularly resistant to deformation and wear, making it ideal for applications in extreme environments. 4140 steel plates are used in manufacturing parts that require strength and resistance to shock, corrosion, and abrasion.
2. Applications/Industries
Automotive: Used in the production of crankshafts, gears, axles, and other components that must withstand high torque and wear.
Aerospace: Components like turbine shafts, aircraft frames, and landing gear parts that require strength and fatigue resistance under extreme conditions.
Oil & Gas: Drill pipes, valve bodies, and other oilfield equipment requiring resistance to high pressure, corrosion, and wear.
Heavy Machinery: Machine frames, spindles, shafts, and gears for heavy-duty equipment that experience high loads and stresses.
Power Generation: Components such as shafts, couplings, and gears used in power plants and turbine generators.
Tool Manufacturing: Dies, press tools, and cutting tools for heavy manufacturing processes requiring high durability.
Military & Defense: Armored components, weapon parts, and vehicle structures subjected to high stress and impact.
3. Chemical Composition
Carbon (C): 0.38–0.45%
Silicon (Si): ≤ 0.40%
Manganese (Mn): 060–0.90%
Phosphorus (P): ≤ 0.035%
Sulfur (S): ≤ 0.030%
Chromium (Cr): 0.90–1.20%
Molybdenum (Mo): 0.15–0.30%
4.Technical Specifications
Yield Strength: Approx. 650–900 MPa (depending on heat treatment)
Tensile Strength: Approx. 900–1200 MPa
Hardness: 28–32 HRC (Rockwell Hardness) (before heat treatment)
Hardness: 36–45 HRC (Rockwell Hardness) (after heat treatment)
5.Certifications/Standards
ISO 9001 Certified: Ensures consistent production quality and standards.
Meets AISI/SAE 4140 Specifications: Adheres to American Iron and Steel Institute (AISI) and Society of Automotive Engineers (SAE) standards for alloy steels.
Meets ASTM A29 Specifications: Complies with the ASTM standards for alloy steel plates.