SAE-AISI A7 Steel vs. Grade N7M Nickel

SAE-AISI A7 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 (9, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A7 steel and the bottom bar is grade N7M nickel.

SAE-AISI A7 (T30107) Air-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		72
Shear Modulus, GPa		85

Tensile Strength: Ultimate (UTS), MPa		800 to 2150
Tensile Strength: Ultimate (UTS), MPa		590

Thermal Properties

Latent Heat of Fusion, J/g		260
Latent Heat of Fusion, J/g		320

Melting Completion (Liquidus), °C		1470
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		10
Base Metal Price, % relative		75

Density, g/cm³		7.7
Density, g/cm³		9.3

Embodied Carbon, kg CO₂/kg material		13
Embodied Carbon, kg CO₂/kg material		16

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

Embodied Water, L/kg		100
Embodied Water, L/kg		270

Common Calculations

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

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		22

Strength to Weight: Axial, points		29 to 77
Strength to Weight: Axial, points		18

Strength to Weight: Bending, points		25 to 48
Strength to Weight: Bending, points		17

Thermal Shock Resistance, points		27 to 72
Thermal Shock Resistance, points		19

Alloy Composition

Carbon (C), %		2.0 to 2.9
Carbon (C), %		0 to 0.070

Chromium (Cr), %		5.0 to 5.8
Chromium (Cr), %		0 to 1.0

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

Iron (Fe), %		81.4 to 87.7
Iron (Fe), %		0 to 3.0

Manganese (Mn), %		0 to 0.8
Manganese (Mn), %		0 to 1.0

Molybdenum (Mo), %		0.9 to 1.4
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 0.5
Silicon (Si), %		0 to 1.0

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

Tungsten (W), %		0.5 to 1.5
Tungsten (W), %		0

Vanadium (V), %		3.9 to 5.2
Vanadium (V), %		0