AISI 1044 Carbon Steel (UNS G10440)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations


Carbon steels are a category of steel containing 0.12 to 2% carbon. When the percentage of carbon content increases, hardness and strength of these steels increase with heat treatment, but lose a little amount of their ductility.

AISI 1044 carbon steel is medium-carbon steel that can be heat treated, flame or induction hardened. It is recommended that carburizing or cyaniding be avoided.

The following sections will discuss AISI 1044 carbon steel in futher detail.

Chemical Composition

The chemical composition of AISI 1044 carbon steel is outlined in the following table.

Element Content (%)
Carbon, C 0.43-0.50
Manganese, Mn 0.30-0.60
Sulfur, S 0.05 (max)
Phosphorous, P 0.04 (max)
Iron, Fe Balance

Physical Properties

The physical properties of AISI 1044 carbon steel are tabulated below.

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

Mechanical Properties

The following table shows mechanical properties of cold rolled AISI 1044 carbon steel.

Properties Metric Imperial
Tensile strength 550 MPa 79800 psi
Yield strength 310 MPa 45000 psi
Modulus of elasticity 205 GPa 29700 ksi
Shear modulus (typical for steel) 80 GPa 11600 ksi
Poisson’s ratio 0.29 0.29
Elongation at break (in 50 mm) 16% 16%
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

Thermal Properties

The thermal properties of cold rolled AISI 1044 carbon steel are given in the following table.

Properties Metric Imperial
Thermal conductivity 49.8 W/mK 346 BTU in/hr.ft2.°F
Thermal expansion co-efficient (at 0.000-100°C/32-212°F) 11.5 µm/m°C 6.39 µm/m°C

Other Designations

Other designations that are equivalent to AISI 1044 carbon steel include the following.

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