AISI 440A

AISI 440A

Stainless steel grade 440A is a high carbon martensitic stainless steel that possesses good strength, moderate corrosion resistance, and excellent hardness and wear resistance.

Chemical Composition


Element Content(%)
Iron, Fe Balance
Chromium, Cr 16-18
Manganese, Mn 1
Silicon, Si 1
Molybdenum, Mo 0.75
Carbon, C 0.60-0.75
Sulfur, S 0.03
Phosphorous, P 0.04

Mechanical Properties


Properties Metric Imperial
Tensile strength 725-1790 MPa 105000 - 260000 psi
Yield strength (@strain 0.200 %) 415-1650 MPa 60200 - 239000 psi
Modulus of elasticity 204 - 215 GPa 29600 - 31200 ksi
Elongation at break (in 50 mm) 5- 20% 5- 20%
Hardness, Rockwell B 95 95

Sheets / Plates

Production Route Hot Rolled, Cold Rolled
Material Standard AISI, ASTM, ASME, DIN, BS, EN, ISO, JIS, GOST, SAE, IS & Custom Chemistry
Size Width from 100mm to 3000mm ; Length from 500mm to 12000mm
Thickness 0.1mm to 400mm
Delivery Condition As Rolled, Annealed, Quenched and Tempered, Normalized
Surface Finish Plain, Brushed, Cladded

AISI 440A Equivalent Grade / Specifications

  • AISI 440A
  • AMS 5631
  • AMS 5632
  • ASTM A276
  • ASTM A314
  • ASTM A473
  • ASTM A511
  • ASTM A580
  • QQ S763
  • SAE 51440A
  • FED QQ-S-763
  • MIL SPEC MIL-S-862
  • SAE J405 (51440A)

AISI 440A Applications

  1. Structures in Buildings, bridges, railway stations
  2. Fabrication of pipeline components & Industrial equipment
  3. Construction of automotive bodies, warehouses, shipping containers
  4. Commercial appliances, etc.