AISI 1212 Carbon Steel (UNS G12120)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Other Designations


Carbon is the major alloying element present in the carbon steels. These steels contain aluminium, chromium, copper, nickel, and molybdenum in small quantities. They also contain 0.4% of silicon and 1.2% of manganese.

The following datasheet gives an overview of AISI 1212 carbon steel.

Chemical Composition

The following table outlines the chemical composition of AISI 1212 carbon steel.

Element Content (%)
Iron, Fe 98.52 - 99.07
Sulfur, S 0.16 - 0.230
Carbon, C ≤ 0.13
Manganese, Mn 0.70 - 1.0
Phosphorous, P 0.070 - 0.12

Physical Properties

The physical properties of AISI 1212 carbon steel are given in the following table.

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

Mechanical Properties

The mechanical properties of the cold drawn AISI 1212 carbon steel are tabulated below.

Properties Metric Imperial
Tensile strength 540 MPa 78300 psi
Yield strength 415 MPa 60200 psi
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Shear modulus (typical for steel) 80 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 10% 10%
Reduction of area 35% 35%
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 (based on 100 machinability for AISI 1212 steel.) 100 100

Other Designations

Other designations that are equivalent to AISI 1212 carbon steel include:

  • AMS 5010D
  • ASTM A108
  • ASTM A29
  • FED QQ-S-637 (1212)
  • SAE J403


AISI 1212 carbon steel is used in screw machine operations.

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