AISI 1038 Carbon Steel (UNS G10380)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations


Carbon steels contain carbon as the key alloying element. They also contain up to 0.4% silicon and 1.2% manganese. In addition, residual elements such as copper, molybdenum, aluminium, chromium and nickel are present.

AISI 1038 carbon steel is a medium high carbon steel with good weldability and machinability. This steel can be strengthened by heat treatment after forming.

The following sections will explain more about AISI 1038 carbon steel.

Chemical Composition

The chemical composition of AISI 1038 carbon steel is outlined in the following table.

Element Content (%)
Iron, Fe 98.59-99.09
Manganese, Mn 0.60-0.90
Carbon, C 0.340-0.420
Sulfur, S ≤ 0.050
Phosphorous, P ≤ 0.040

Physical Properties

The physical properties of AISI 1038 carbon steel are tabulated below.

Properties Metric Imperial
Density 7.845 g/cm3 0.2834 lb/in³

Mechanical Properties

The following table shows mechanical properties of cold drawn AISI 1038 carbon steel.

Properties Metric Imperial
Tensile strength, ultimate 570 MPa 82700 psi
Tensile strength, yield 485 MPa 70300 psi
Modulus of elasticity 190-210 GPa 29700-30458 ksi
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Shear modulus (typical for steel) 80.0 GPa 11600 ksi
Poissons ratio 0.27-0.30 0.27-0.30
Elongation at break (in 50 mm) 12% 12%
Reduction of area 35% 35%
Hardness, Brinell 163 163
Hardness, Knoop (converted from Brinell hardness) 184 184
Hardness, Rockwell B (converted from Brinell hardness) 84 84
Hardness, Vickers (converted from Brinell hardness) 170 170
Machinability (based on AISI 1212 steel. as 100 machinability) 65 65

Thermal Properties

The thermal properties of AISI 1038 carbon steel are given in the following table.

Thermal Properties Metric Imperial
Thermal conductivity 51.9 W/mK 360 BTU in/hr.ft².°F

Other Designations

Other designations that are equivalent to AISI 1038 carbon steel include the following:

  • ASTM A29
  • ASTM A510
  • ASTM A544
  • ASTM A545
  • ASTM A546
  • ASTM A576
  • ASTM A839
  • SAE J1397
  • SAE J403
  • SAE J412
  • SAE J414
  • AFNOR XC 38 TS
  • DIN 1.1176

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