ACI-ASTM CN7MS Steel vs. SAE-AISI O6 Steel

Both ACI-ASTM CN7MS steel and SAE-AISI O6 steel are iron alloys. They have 52% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN7MS steel and the bottom bar is SAE-AISI O6 steel.

ACI-ASTM CN7MS (J94650) Cast Stainless Steel SAE-AISI O6 (T31506) Oil-Hardening Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		180

Poisson's Ratio		0.28
Poisson's Ratio		0.29

Shear Modulus, GPa		77
Shear Modulus, GPa		71

Tensile Strength: Ultimate (UTS), MPa		540
Tensile Strength: Ultimate (UTS), MPa		670 to 2070

Thermal Properties

Latent Heat of Fusion, J/g		340
Latent Heat of Fusion, J/g		260

Melting Completion (Liquidus), °C		1400
Melting Completion (Liquidus), °C		1430

Melting Onset (Solidus), °C		1350
Melting Onset (Solidus), °C		1390

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

Thermal Conductivity, W/m-K		12
Thermal Conductivity, W/m-K		43

Thermal Expansion, µm/m-K		16
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Base Metal Price, % relative		28
Base Metal Price, % relative		2.3

Density, g/cm³		7.9
Density, g/cm³		7.7

Embodied Carbon, kg CO₂/kg material		5.1
Embodied Carbon, kg CO₂/kg material		1.5

Embodied Energy, MJ/kg		71
Embodied Energy, MJ/kg		21

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

Common Calculations

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		13

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

Strength to Weight: Axial, points		19
Strength to Weight: Axial, points		24 to 74

Strength to Weight: Bending, points		19
Strength to Weight: Bending, points		22 to 47

Thermal Diffusivity, mm²/s		3.2
Thermal Diffusivity, mm²/s		12

Thermal Shock Resistance, points		13
Thermal Shock Resistance, points		22 to 69

Alloy Composition

Carbon (C), %		0 to 0.070
Carbon (C), %		1.3 to 1.6

Chromium (Cr), %		18 to 20
Chromium (Cr), %		0 to 0.3

Copper (Cu), %		1.5 to 2.0
Copper (Cu), %		0 to 0.25

Iron (Fe), %		45.4 to 53.5
Iron (Fe), %		94.6 to 97.7

Manganese (Mn), %		0 to 1.0
Manganese (Mn), %		0.3 to 1.1

Molybdenum (Mo), %		2.5 to 3.0
Molybdenum (Mo), %		0.2 to 0.3

Nickel (Ni), %		22 to 25
Nickel (Ni), %		0 to 0.3

Phosphorus (P), %		0 to 0.040
Phosphorus (P), %		0 to 0.030

Silicon (Si), %		2.5 to 3.5
Silicon (Si), %		0.55 to 1.5

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