Material Name: Gear Steel SCM421
Execution standard: JIS G4053-2003
Characteristics and Scope of Application:
SCM421 is commonly used to manufacture important carburized parts that require high surface hardness and good wear resistance, such as gears, camshafts, connecting rods, pins, etc.
● Chemical composition:
Sulfur S: allowable residual content ≤ 0.030
Phosphorus P: allowable residual content ≤ 0.030
Chromium Cr: 0.90-1.20
Nickel Ni: allowable residual content ≤ 0.25
Copper Cu: allowable residual content ≤ 0.030
Molybdenum Mo: 0.215-0.25
● Mechanical properties:
Tensile strength σ b (MPa): ≥ 1175 (120)
Yield strength σ s (MPa): ≥ 885 (90)
Elongation rate δ 5 (%): ≥ 10
Shrinkage rate of cross-section (%): ≥ 45
Impact energy Akv (J): ≥ 55
Impact toughness value α kv (J/cm ²): ≥ 69 (7)
Hardness: ≤ 217HB
Sample size: The sample blank size is 15mm
Heat treatment specifications and metallographic structure:
Heat treatment specifications: quenching at 850 ℃, oil cooling; Temper at 200 ℃, water-cooled or air-cooled.
Metallographic structure: tempered martensite.
Delivery status: Delivery shall be made in a heat-treated (normalizing, annealing, or high-temperature tempering) or non heat-treated state, and the delivery status shall be specified in the contract.
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.