Grade 440A Stainless Steel

Description

Grade 440A is a martensitic stainless steel, the lowest carbon variant among the 440 series (440A, 440B, 440C), offering a balanced combination of hardness, wear resistance, and corrosion resistance. It contains 16.0-18.0% chromium, which provides good basic corrosion protection in mild environments, and a carbon content of 0.60-0.75%-lower than 440B and 440C-making it slightly more formable and weldable than its higher-carbon counterparts. As a martensitic grade, 440A is magnetic and can be heat-treated (quenched and tempered) to achieve moderate hardness and strength, making it suitable for applications where wear resistance is required but extreme hardness is not necessary.

Chemical Composition (wt%)

C: 0.60-0.75, Cr: 16.00-18.00, Mn ≤ 1.00, Si ≤ 1.00, P ≤ 0.045, S ≤ 0.030, Mo ≤ 0.75, Ni ≤ 0.75

Mechanical Properties

Tensile Strength ≥ 760 MPa, Yield Strength ≥ 550 MPa, Elongation ≥ 10%, Hardness ≤ 269 HB (annealed); Tensile Strength ≥ 1100 MPa, Yield Strength ≥ 860 MPa, Elongation ≥ 8%, Hardness 54-58 HRC (heat-treated)

Advantages

Balanced hardness and wear resistance; better formability and weldability than 440B/440C; good corrosion resistance in mild environments; magnetic; heat-treatable for enhanced performance; cost-effective; easier to machine than higher-carbon 440 variants.

Applications

Knives, blades, cutlery, valves, pumps, gears, bearings, surgical instruments, and general industrial components requiring moderate wear resistance and mild corrosion protection.

Equivalent Grades

AISI 440A, UNS S44002, EN 1.4116, GB 7Cr17

 

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.