Grade N7M Nickel vs. SAE-AISI H21 Steel

Grade N7M nickel belongs to the nickel alloys classification, while SAE-AISI H21 steel belongs to the iron 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 grade N7M nickel and the bottom bar is SAE-AISI H21 steel.

Grade N7M (J30007) Cast Nickel SAE-AISI H21 (T20821) Tungsten Hot-Work Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		220
Elastic (Young's, Tensile) Modulus, GPa		200

Poisson's Ratio		0.31
Poisson's Ratio		0.29

Shear Modulus, GPa		85
Shear Modulus, GPa		76

Tensile Strength: Ultimate (UTS), MPa		590
Tensile Strength: Ultimate (UTS), MPa		720 to 1790

Thermal Properties

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

Melting Completion (Liquidus), °C		1650
Melting Completion (Liquidus), °C		1630

Melting Onset (Solidus), °C		1590
Melting Onset (Solidus), °C		1580

Specific Heat Capacity, J/kg-K		390
Specific Heat Capacity, J/kg-K		440

Thermal Expansion, µm/m-K		9.9
Thermal Expansion, µm/m-K		11

Otherwise Unclassified Properties

Base Metal Price, % relative		75
Base Metal Price, % relative		23

Density, g/cm³		9.3
Density, g/cm³		8.5

Embodied Carbon, kg CO₂/kg material		16
Embodied Carbon, kg CO₂/kg material		4.5

Embodied Energy, MJ/kg		200
Embodied Energy, MJ/kg		68

Embodied Water, L/kg		270
Embodied Water, L/kg		72

Common Calculations

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

Stiffness to Weight: Bending, points		22
Stiffness to Weight: Bending, points		23

Strength to Weight: Axial, points		18
Strength to Weight: Axial, points		23 to 58

Strength to Weight: Bending, points		17
Strength to Weight: Bending, points		21 to 38

Thermal Shock Resistance, points		19
Thermal Shock Resistance, points		24 to 59

Alloy Composition

Carbon (C), %		0 to 0.070
Carbon (C), %		0.28 to 0.36

Chromium (Cr), %		0 to 1.0
Chromium (Cr), %		3.0 to 3.8

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

Iron (Fe), %		0 to 3.0
Iron (Fe), %		87.6 to 93.8

Manganese (Mn), %		0 to 1.0
Manganese (Mn), %		0.15 to 0.4

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

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

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

Silicon (Si), %		0 to 1.0
Silicon (Si), %		0.15 to 0.5

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

Tungsten (W), %		0
Tungsten (W), %		8.5 to 10

Vanadium (V), %		0
Vanadium (V), %		0.3 to 0.6