431 Stainless Steel Plate & Coil: Martensitic Stainless Steel For High-Strength Components

What is 431 Stainless Steel Plate & Coil?

431 stainless steel plate & coil is a nickel-containing martensitic stainless steel product, balancing high strength, corrosion resistance and toughness. It is designed for high-strength mechanical components in automotive and industrial engineering.

Equivalent Grades (Horizontal)

UNS: S43100 | JIS: SUS431 | GB: 17Cr16Ni2 | EN: X17CrNi16-2 | W.Nr.: 1.4057

Chemical Composition (wt%, Horizontal)

C: ≤0.20 | Si: ≤1.00 | Mn: ≤1.00 | P: ≤0.040 | S: ≤0.030 | Cr: 15.00-17.00 | Ni: 1.25-2.50 | Fe: Balance

Key Properties (20°C, Quenched & Tempered, Horizontal)

Density: 7.75g/cm³ | Melting Point: 1450-1510°C | Tensile Strength: ≥880N/mm² | Yield Strength: ≥690N/mm² | Elongation: ≥12% | Hardness: ≤285HB

Core Characteristics

• High strength and toughness: Nickel addition improves toughness while maintaining high strength, suitable for high-load components • Enhanced corrosion resistance: Better than 410/420, adapting to mild corrosive industrial and automotive environments • Good heat treatability: Quenching and tempering process optimizes mechanical properties, meeting diverse strength requirements • Widely used in high-load scenarios: Applied in automotive parts, mechanical shafts and high-strength fasteners

431 vs 410 Stainless Steel Plate & Coil (Horizontal)

Ni Content: 431 (1.25-2.50%) | 410 (None) | Tensile Strength: 431 (≥880N/mm²) | 410 (≥480N/mm²) | Toughness: 431 (Excellent) | 410 (Good) | Corrosion Resistance: 431 (Better) | 410 (Basic)

 

Stainless Steel Suppliers

If you have project requirements for stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. It can be processed into various practical product forms, including plates, coils, tubes, bars, wires, etc. For detailed chemical composition information and free samples, please contact our factory immediately. We offer competitive prices and excellent service.Email: info@gneestainless.com

 

Testing and Documentation: Factory test certificate, EN 10204 3.1, chemical report, mechanical report, destructive testing report, non-destructive testing report, PMI test report, visual inspection report, third-party inspection report, NABL certified laboratory report.
Packaging: Wooden crate packaging, bubble wrap packaging, steel strapping, or packaging according to customer requirements.