AISI 1012 Carbon Steel (UNS G10120)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations


Carbon steels are steels that contain only carbon as their chief alloying element. Traces of 0.4% silicon and 1.2% manganese are present in these steels. Small quantities of copper, nickel, molybdenum, aluminium and chromium can also be found in the carbon steels.

AISI 1012 carbon steel is characterized with good machinability and formability, and can be hardened by cyaniding.

The following datasheet provides an overview of AISI 1012 carbon steel.

Chemical Composition

The chemical composition of AISI 1012 carbon steel is outlined in the following table.

Element Content (%)
Iron, Fe 99.16-99.6
Manganese, Mn 0.30-0.60
Carbon, C 0.10-0.15
Sulfur, S ≤ 0.050
Phosphorous, P ≤ 0.040

Physical Properties

The following table shows the physical properties of AISI 1012 carbon steel.

Properties Metric Imperial
Density 7.87 g/cm3 0.284 lb/in³

Mechanical Properties

The mechanical properties of cold drawn AISI 1012 carbon steel are displayed in the following table.

Properties Metric Imperial
Hardness, Brinell 105 105
Hardness, Knoop (converted from Brinell hardness) 123 123
Hardness, Rockwell B (converted from Brinell hardness) 60 60
Hardness, Vickers (converted from Brinell hardness) 108 108
Tensile strength 370 MPa 53700 psi
Yield strength 310 MPa 45000 psi
Elongation at break (In 50 mm) 19.00% 19.00%
Reduction of area 40.00% 40.00%
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Machinability (based on AISI 1212 steel as 100 machinability. The machinability of Group I bar, rod, and wire products can be improved by cold drawing.) 55 55
Shear modulus (typical for steel) 80.0 GPa 11600 ksi
Poisson's ratio 0.27-0.30 0.27-0.30
Elastic modulus 190-210 GPa 27557-30458 ksi

Thermal Properties

The thermal properties of AISI 1012 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

Equivalent materials to AISI 1012 carbon steel are given in the following table.

ASTM A549 ASTM A575 ASTM A576 MIL SPEC MIL-S-11310 (CS1012)
SAE J403 SAE J412 SAE J414

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Your comment type