1. Key Properties:
Alloy Steel with Manganese and Chromium: 20MnCr6-5 (1.7147) is an alloy steel that combines manganese and chromium, offering enhanced hardenability, strength, and wear resistance.
Good Hardenability: This steel is designed for heat treatment to improve hardness and strength, making it suitable for high-stress applications.
Excellent Toughness: Despite its high strength, 20MnCr6-5 maintains excellent toughness, making it suitable for applications requiring impact resistance.
Wear Resistance: The alloying elements provide good resistance to wear, making it ideal for components subjected to friction or heavy loads.
Good Weldability: This steel has good weldability but may require preheating and post-weld heat treatment for thicker sections to avoid cracking and ensure a strong weld.
Moderate Corrosion Resistance: While it has some corrosion resistance due to the chromium content, it is not as resistant as stainless steels, so surface protection is recommended in corrosive environments.
2. Applications/Industries:
Automotive: 20MnCr6-5 is used for automotive components such as gears, shafts, and camshafts, where high strength, toughness, and wear resistance are essential.
Heavy Machinery: It is applied in heavy machinery parts like gears, axles, and bearings, where parts are subjected to high mechanical loads and wear.
Oil & Gas: Used in oil and gas industry equipment like pumps, valve components, and pressure vessels where mechanical strength and wear resistance are important.
Manufacturing: This steel is used in manufacturing industries for high-strength, wear-resistant components such as tools, dies, and molds.
Industrial Equipment: Components like rollers, spindles, and shafts in industrial equipment that face high load-bearing conditions are often made from 20MnCr6-5 steel.
3. Certifications/Standards:
DIN 17205: 20MnCr6-5 (1.7147) complies with DIN 17205 for alloy steels, ensuring the material meets the required specifications and mechanical properties.
ISO 9001: Quality management system certification, ensuring the steel meets rigorous quality standards in industrial applications.
4. Chemical Composition:
Carbon (C): 0.18% – 0.22%
Manganese (Mn): 1.10% – 1.40%
Chromium (Cr): 0.90% – 1.20%
Silicon (Si): 0.15% – 0.35%
Phosphorus (P): 0.030% max
Sulfur (S): 0.035% max
Iron (Fe): Balance
5. Technical Specifications:
Yield Strength:
20MnCr6-5: 700–900 MPa (depending on heat treatment and thickness)
Tensile Strength:
20MnCr6-5: 900–1200 MPa
Hardness:
20MnCr6-5: After heat treatment, it can reach 50–60 HRC (Rockwell hardness), providing excellent wear resistance.