SAE-AISI O6 Steel vs. S44700 Stainless Steel

Both SAE-AISI O6 steel and S44700 stainless steel are iron alloys. They have 68% of their average alloy composition in common. There are 19 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI O6 steel and the bottom bar is S44700 stainless steel.

SAE-AISI O6 (T31506) Oil-Hardening Steel UNS S44700 (29-4) Stainless Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		180
Elastic (Young's, Tensile) Modulus, GPa		210

Poisson's Ratio		0.29
Poisson's Ratio		0.27

Shear Modulus, GPa		71
Shear Modulus, GPa		82

Tensile Strength: Ultimate (UTS), MPa		670 to 2070
Tensile Strength: Ultimate (UTS), MPa		600

Thermal Properties

Latent Heat of Fusion, J/g		260
Latent Heat of Fusion, J/g		300

Melting Completion (Liquidus), °C		1430
Melting Completion (Liquidus), °C		1460

Melting Onset (Solidus), °C		1390
Melting Onset (Solidus), °C		1410

Specific Heat Capacity, J/kg-K		480
Specific Heat Capacity, J/kg-K		480

Thermal Expansion, µm/m-K		12
Thermal Expansion, µm/m-K		11

Otherwise Unclassified Properties

Base Metal Price, % relative		2.3
Base Metal Price, % relative		18

Density, g/cm³		7.7
Density, g/cm³		7.8

Embodied Carbon, kg CO₂/kg material		1.5
Embodied Carbon, kg CO₂/kg material		3.6

Embodied Energy, MJ/kg		21
Embodied Energy, MJ/kg		49

Embodied Water, L/kg		47
Embodied Water, L/kg		180

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		15

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		25

Strength to Weight: Axial, points		24 to 74
Strength to Weight: Axial, points		21

Strength to Weight: Bending, points		22 to 47
Strength to Weight: Bending, points		20

Thermal Shock Resistance, points		22 to 69
Thermal Shock Resistance, points		19

Alloy Composition

Carbon (C), %		1.3 to 1.6
Carbon (C), %		0 to 0.010

Chromium (Cr), %		0 to 0.3
Chromium (Cr), %		28 to 30

Copper (Cu), %		0 to 0.25
Copper (Cu), %		0 to 0.15

Iron (Fe), %		94.6 to 97.7
Iron (Fe), %		64.9 to 68.5

Manganese (Mn), %		0.3 to 1.1
Manganese (Mn), %		0 to 0.3

Molybdenum (Mo), %		0.2 to 0.3
Molybdenum (Mo), %		3.5 to 4.2

Nickel (Ni), %		0 to 0.3
Nickel (Ni), %		0 to 0.15

Nitrogen (N), %		0
Nitrogen (N), %		0 to 0.020

Phosphorus (P), %		0 to 0.030
Phosphorus (P), %		0 to 0.025

Silicon (Si), %		0.55 to 1.5
Silicon (Si), %		0 to 0.2

Sulfur (S), %		0 to 0.030
Sulfur (S), %		0 to 0.020