AISI 5140

AISI 5140

Alloy steels comprise a wide range of steels whose compositions are more than the limitations of C, Mo, Cr, Va, Mn, Ni, Si, and B which have been fixed for carbon steels. These steels are more responsive to mechanical and heat treatments than carbon steels.

Chemical Composition


Element Content(%)
Iron, Fe 97.395-98.07
Manganese, Mn 0.700-0.900
Chromium, Cr 0.700-0.900
Carbon, C 0.380-0.430
Silicon, Si 0.150-0.300
Sulfur, S ≤ 0.0400
Phosphorous, P ≤ 0.0350

Mechanical Properties


Properties Metric Imperial
Tensile strength 570 MPa 82700 psi
Yield strength 295 MPa 42800 psi
Elastic modulus 190-210 GPa 27557-30458 ksi
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Shear modulus (typical for steel) 80 GPa 11600 ksi
Poisson’s ratio 0.27-0.30 0.27-0.30
Izod Impact 41.0 J 30.2 ft.lb
Hardness, Brinell 167 167
Hardness, Knoop (converted from Brinell hardness) 188 188
Hardness, Rockwell B (converted from Brinell hardness) 85 85
Hardness, Vickers (converted from Brinell hardness) 175 175
Machinability (annealed and cold drawn, based on 100 machinability for AISI 1212 steel) 65 65

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 5140 Equivalent Grade / Specifications

  • AFNOR 42 C 2
  • AFNOR 42 C 4
  • DIN 1.7035
  • UNI 40 Cr 4
  • UNI 41 Cr 4 KB
  • JIS SCr 4 H
  • B.S. 2 S 117
  • B.S. 530 A 40
  • B.S. 530 H 40
  • B.S. 530 M 40
  • ASTM A322
  • ASTM A331
  • ASTM A505
  • ASTM A519
  • SAE J404
  • SAE J412
  • SAE J770

AISI 5140 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.