5Cr21Mn9Ni4N heat-resistant steel
Detailed introduction:
Standard: GB/T 1221-1992
Characteristics and scope of application: Used for manufacturing exhaust valves for gasoline and diesel engines that are mainly subjected to high strength
Chemical composition:
Carbon C: 0.48-0.58
Silicon Si: ≤ 0.35
Manganese Mn: 8.00-10.00
Sulfur S: ≤ 0.030
Phosphorus P: ≤ 0.040
Chromium Cr: 20.00-22.00
Nickel Ni: 3.25-4.50
Nitrogen N: 0.35-0.50
Mechanical properties:
Tensile strength σ b (MPa): ≥ 885
Conditional yield strength σ 0.2 (MPa): ≥ 560
Elongation rate δ 5 (%): ≥ 8
Hardness: ≥ 302HB
Heat treatment specifications and metallographic structure: Heat treatment specifications: rapid cooling at 1100-1200 ℃ for solid solution, and air cooling at 730-780 ℃ for aging. Metallographic structure: The structural characteristics are austenitic.
Application: Used for manufacturing exhaust valves for gasoline and diesel engines that mainly withstand high strength
Delivery status: Generally delivered in a standardized heat treatment state, with the type of heat treatment specified in the contract; Unless otherwise specified, delivery shall be made in the non heat treated state.

1. The company has established long-term and stable cooperative relationships with multiple well-known steel mills at home and abroad, all of which provide original material certification
2. Wholesale and retail, with favorable prices, superior quality (large quantities are preferred), and timely and fast delivery
3. The company has several large vertical band saws and steel plate precision machining machinery,
4. It is a large enterprise that integrates the sales, wholesale, and machining services of multiple imported high-quality mold steel products
5. Wide channels, sufficient supply of goods, and business scope covering all parts of the country, can meet the needs of customers in various regions
Sincerely welcome new and old customers from all walks of life to call and inquire about and negotiate business at any time. Our high-quality products and reasonable prices will definitely meet your requirements!
Welcome new and old customers to call for consultation and negotiation.