AISI 4027

AISI 4027

Alloy steels comprise a wide range of steels with compositions that exceed the limitations of Si, Va, Cr, Ni, Mo, Mn, B and C allocated for carbon steels. In comparison with carbon steels, alloy steels are more responsive to mechanical and heat treatments. Alloy steels have elements such as chromium, cobalt, nickel, etc. These steels can be used in specific melting and deoxidization processes for particular applications.

Chemical Composition


Element Content(%)
Iron, Fe 98.08-98.7
Manganese, Mn 0.70-0.90
Carbon, C 0.25-0.30
Molybdenum, Mo 0.20-0.30
Silicon, Si 0.15-0.35
Sulfur, S 0.040
Phosphorous, P 0.035

Mechanical Properties


Properties Metric Imperial
Tensile strength 515 MPa 74700 psi
Yield strength 325 MPa 47100 psi
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Shear modulus (typical for steel) 80.0 GPa 11600 ksi
Elastic modulus 190-210 GPa 27557-30458 ksi
Poisson's ratio 0.27-0.30 0.27-0.30
Elongation at break (in 50 mm) 30.00% 30.00%
Reduction of area 52.90% 52.90%
Hardness, Brinell 143 143
Hardness, Knoop (converted from Brinell hardness) 163 163
Hardness, Rockwell B (converted from Brinell hardness) 78 78
Hardness, Vickers (converted from Brinell hardness) 149 149
Machinability (annealed and cold drawn. Based on 100 machinability for AISI 1212 steel) 70 70

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 4027 Equivalent Grade / Specifications

  • ASTM A322
  • ASTM A331
  • ASTM A519
  • SAE J404
  • SAE J412
  • SAE J770

AISI 4027 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.