Steel AISI 1045

Steel AISI 1045 (medium carbon, cold drawn) strength, stiffness, density and thermal properties, with their source.

A bracket in Steel AISI 1045, brushed finish.

Mechanical
Process	Wrought
Yield strength	531MPasourceproducer-stated, cold drawn
Ultimate tensile strength	627MPasourceproducer-stated, cold drawn
Elongation at break	12%sourcein 2 in (50.8 mm)
Young's modulus (stiffness)	210GPasourcetypical
Density	7,800kg/m³sourcetypical
Strength to weight	68.1kN·m/kg
Stiffness to weight	26.9MN·m/kg
Poisson's ratio	0.3sourcetypical
Shear modulus	80.8GPa
Bulk modulus	175GPa
Speed of sound	5,189m/s
Thermal
Thermal conductivity	40–45W/m·Ksourcetypical range, ambient
Thermal expansion	12µm/m·Ksourcetypical, mean 20-300 °C
100 mm part over a 50 °C swing	60µm growth
Specific heat	460–480J/kg·Ksourcetypical range, 50/100 °C
Heats up and cools (diffusivity)	11.6mm²/s
Thermal shock resistance	6,269W/m
Values for	AISI 1045 cold drawn bar (Niagara LaSalle) for mechanical; Ovako C45 (lists 'SAE 1045' as a similar designation) for physical constants

Among 59 materials

Stiffness against density

Strength against density