AISI 1050 Carbon Steel (UNS G10500)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations


Carbon steels contain carbon as the main alloying element. They are designated by AISI four-digit numbers, and contain 0.4% of silicon and 1.2% of manganese. Molybdenum, chromium, nickel, copper, and aluminium are present in small quantities. Impurities such as sulfur and phosphorous are also found in these steels.

Chemical Composition

The chemical composition of AISI 1050 carbon steel is tabulated below.

Element Content (%)
Iron, Fe 98.46-98.92
Manganese, Mn 0.60-0.90
Carbon, C 0.470-0.55
Sulfur, S ≤ 0.050
Phosphorous, P ≤ 0.040

Physical Properties

The following table shows the physical properties of AISI 1050 carbon steel.

Properties Metric Imperial
Density 7.85 g/cm3 0.284 lb/in³

Mechanical Properties

The mechanical properties of the cold drawn AISI 1050 carbon steel are outlined in the following table.

Properties Metric Imperial
Tensile strength 690 MPa 100000 psi
Yield strength 580 MPa 84100 psi
Shear modulus (typical for steel) 80 GPa 11600 ksi
Bulk modulus (typical for steel) 140 GPa 20300 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) 10% 10%
Reduction of area 30% 30%
Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) 13 -
Hardness, Brinell 197 197
Hardness, Knoop (converted from Brinell hardness) 219 219
Hardness, Rockwell B (converted from Brinell hardness) 92 92
Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) 13 13
Hardness, Vickers (converted from Brinell hardness) 207 207

Thermal Properties

The thermal properties of AISI 1050 carbon steel are given in the following table.

Properties Metric Imperial
Thermal conductivity (typical steel) 49.8 W/mK 346 BTU in/hr.ft².°F

Other Designations

Other designations that are equivalent to AISI 1050 carbon steel include:

  • AMS 5085
  • ASTM A29 (1050)
  • ASTM A510 (1050)
  • ASTM A513
  • ASTM A519 (1050)
  • ASTM A576 (1050)
  • ASTM A682 (1050)
  • ASTM A827
  • ASTM A830
  • QQ S700 (C1050)
  • SAE J1397 (1050)
  • SAE J403 (1050)
  • SAE J412 (1050)


  1. omar ossama omar ossama Saudi Arabia says:

    at what T this data was measured?

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