SAE-AISI O7 Steel vs. Grade N7M Nickel

SAE-AISI O7 steel belongs to the iron alloys classification, while grade N7M nickel belongs to the nickel alloys. There are 19 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 SAE-AISI O7 steel and the bottom bar is grade N7M nickel.

SAE-AISI O7 (T31507) Oil-Hardening Steel Grade N7M (J30007) Cast Nickel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		220

Poisson's Ratio		0.29
Poisson's Ratio		0.31

Shear Modulus, GPa		73
Shear Modulus, GPa		85

Tensile Strength: Ultimate (UTS), MPa		680 to 2110
Tensile Strength: Ultimate (UTS), MPa		590

Thermal Properties

Latent Heat of Fusion, J/g		250
Latent Heat of Fusion, J/g		320

Melting Completion (Liquidus), °C		1480
Melting Completion (Liquidus), °C		1650

Melting Onset (Solidus), °C		1430
Melting Onset (Solidus), °C		1590

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		390

Thermal Expansion, µm/m-K		12
Thermal Expansion, µm/m-K		9.9

Otherwise Unclassified Properties

Base Metal Price, % relative		6.0
Base Metal Price, % relative		75

Density, g/cm³		7.9
Density, g/cm³		9.3

Embodied Carbon, kg CO₂/kg material		2.3
Embodied Carbon, kg CO₂/kg material		16

Embodied Energy, MJ/kg		33
Embodied Energy, MJ/kg		200

Embodied Water, L/kg		52
Embodied Water, L/kg		270

Common Calculations

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

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		22

Strength to Weight: Axial, points		24 to 74
Strength to Weight: Axial, points		18

Strength to Weight: Bending, points		22 to 46
Strength to Weight: Bending, points		17

Thermal Shock Resistance, points		23 to 70
Thermal Shock Resistance, points		19

Alloy Composition

Carbon (C), %		1.1 to 1.3
Carbon (C), %		0 to 0.070

Chromium (Cr), %		0.35 to 0.85
Chromium (Cr), %		0 to 1.0

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

Iron (Fe), %		92.9 to 97.6
Iron (Fe), %		0 to 3.0

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

Molybdenum (Mo), %		0 to 0.3
Molybdenum (Mo), %		30 to 33

Nickel (Ni), %		0 to 0.3
Nickel (Ni), %		60.9 to 70

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

Silicon (Si), %		0 to 0.6
Silicon (Si), %		0 to 1.0

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

Tungsten (W), %		1.0 to 2.0
Tungsten (W), %		0

Vanadium (V), %		0 to 0.4
Vanadium (V), %		0