Grade 440C Stainless Steel – High-Carbon 440 Variant For Maximum Wear Resistance

Overview

Grade 440C is the high-carbon variant of the 440 family, renowned for its maximum wear resistance and hardness. It contains 0.95-1.20% carbon and 16.0-18.0% chromium, with molybdenum to enhance corrosion resistance and hardenability. Unlike 440A and 440B, Grade 440C achieves the highest hardness (up to 60 HRC) after heat treatment, making it ideal for applications requiring extreme wear resistance and edge retention. It is magnetic and has good machinability when annealed, though it requires careful heat treatment to balance hardness and toughness, as it is more prone to brittleness than lower-carbon 440 variants.

Chemical Composition (wt%)

C: 0.95-1.20, Cr: 16.00-18.00, Mo: 0.75-1.25, Mn ≤ 1.00, Si ≤ 1.00, P ≤ 0.045, S ≤ 0.030, Ni ≤ 0.75

Typical Mechanical Properties (Annealed Condition)

Tensile Strength (Rm): ≥ 750 MPa; Yield Strength (Rp0.2): ≥ 500 MPa; Elongation (A): ≥ 10%; Brinell Hardness (HB): ≤ 269

Core Advantages

Maximum wear resistance and hardness among 440 variants; excellent edge retention for cutting tools; moderate corrosion resistance; magnetic; good machinability in annealed state; suitable for extreme wear-intensive applications.

Applications

High-performance knives, bearings, surgical instruments, molds, and precision components requiring extreme wear resistance and edge retention.

Equivalent Grades

EN 1.4125, UNS S44004, GB 11Cr17, SUS440C

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.