1. Key Properties
20MnCr5 (1.7147) is a medium-carbon alloy steel that is hardenable and provides excellent wear resistance, high tensile strength, and good toughness. The steel is commonly used in parts that require high surface hardness and good fatigue resistance, especially after carburizing. It is well-suited for applications that need enhanced mechanical properties and can be heat treated to achieve specific hardness levels. The material also exhibits good machinability and weldability.
2. Applications/Industries
Automotive: Gears, shafts, and other high-wear components that require carburizing for enhanced surface hardness.
Heavy Machinery: High-strength parts such as crankshafts, spindles, and axles.
Industrial Equipment: Components like gears, cams, and other power transmission parts that demand wear resistance and toughness.
Tool Manufacturing: Parts that require high surface hardness after heat treatment, such as camshafts and other mechanical parts.
Aerospace: Certain components requiring high fatigue strength and wear resistance.
3. Certifications/Standards
ISO 9001 Certified: Ensures consistent high-quality manufacturing processes.
Meets DIN 17210 and EN 10084 Specifications: Conforms to European standards for carburizing steels.
Meets 20MnCr5 (1.7147) Specifications: Adheres to the specifications for medium-carbon alloy steels used in carburized parts.
4. Chemical Composition
Carbon (C): 0.18–0.22%
Manganese (Mn): 1.10–1.40%
Chromium (Cr): 0.80–1.10%
Phosphorus (P): ≤ 0.025%
Sulfur (S): ≤ 0.025%
Silicon (Si): ≤ 0.35%
5. Technical Specifications
Yield Strength: Approx. 600–800 MPa (depending on heat treatment)
Tensile Strength: Approx. 800–1000 MPa
Hardness: 180–230 HB (Brinell Hardness) (before carburizing)
Surface Hardness (after carburizing): 58–62 HRC