440A Stainless Steel Plate & Coil: Martensitic Medium-Hardness Wear-Resistant Plate/Coil

What is 440A Stainless Steel Plate & Coil?

440A stainless steel plate & coil is a low-carbon variant of 440 series martensitic stainless steel, balancing wear resistance, corrosion resistance and machinability, suitable for general wear-resistant components and low-load cutting tools.

Equivalent Grades (Horizontal)

UNS: S44002 | JIS: SUS440A | GB: 8Cr17 | EN: X85Cr17 | W.Nr.: 1.4028

Chemical Composition (wt%, Horizontal)

C: 0.60-0.75 | Si: ≤1.00 | Mn: ≤1.00 | P: ≤0.040 | S: ≤0.030 | Cr: 16.00-18.00 | Fe: Balance

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

Density: 7.75g/cm³ | Melting Point: 1450-1510°C | Tensile Strength: ≥690N/mm² | Yield Strength: ≥480N/mm² | Elongation: ≥12% | Hardness: 55-57HRC

Core Characteristics

• Medium hardness and wear resistance: Suitable for general wear scenarios, better machinability than 440B/440C • Good corrosion resistance: High chromium content resists mild corrosive media, adapting to dry and low-humidity industrial environments • Stable heat treatment performance: Low deformation during quenching and tempering, suitable for batch production of components • General wear scenario application: Used in bearings, valve seats, general cutting tools and mechanical wear parts

440A vs 440B Stainless Steel Plate & Coil (Horizontal)

C Content: 440A (0.60-0.75%) | 440B (0.75-0.95%) | Hardness: 440A (55-57HRC) | 440B (57-59HRC) | Machinability: 440A (Better) | 440B (General) | Wear Resistance: 440A (Good) | 440B (Better)

 

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.