AISI 384 Stainless Steel vs. Grade N7M Nickel

AISI 384 stainless steel belongs to the iron alloys classification, while grade N7M nickel belongs to the nickel alloys. They have a modest 21% of their average alloy composition in common, which, by itself, doesn't mean much. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is AISI 384 stainless steel and the bottom bar is grade N7M nickel.

AISI 384 (S38400) Stainless Steel Grade N7M (J30007) Cast Nickel

Metric UnitsUS Customary Units

Mechanical Properties

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

Poisson's Ratio		0.28
Poisson's Ratio		0.31

Shear Modulus, GPa		76
Shear Modulus, GPa		85

Tensile Strength: Ultimate (UTS), MPa		480
Tensile Strength: Ultimate (UTS), MPa		590

Thermal Properties

Latent Heat of Fusion, J/g		290
Latent Heat of Fusion, J/g		320

Maximum Temperature: Mechanical, °C		910
Maximum Temperature: Mechanical, °C		900

Melting Completion (Liquidus), °C		1420
Melting Completion (Liquidus), °C		1650

Melting Onset (Solidus), °C		1380
Melting Onset (Solidus), °C		1590

Specific Heat Capacity, J/kg-K		480
Specific Heat Capacity, J/kg-K		390

Thermal Expansion, µm/m-K		16
Thermal Expansion, µm/m-K		9.9

Otherwise Unclassified Properties

Base Metal Price, % relative		20
Base Metal Price, % relative		75

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

Embodied Carbon, kg CO₂/kg material		3.7
Embodied Carbon, kg CO₂/kg material		16

Embodied Energy, MJ/kg		52
Embodied Energy, MJ/kg		200

Embodied Water, L/kg		150
Embodied Water, L/kg		270

Common Calculations

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

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

Strength to Weight: Axial, points		17
Strength to Weight: Axial, points		18

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

Thermal Shock Resistance, points		11
Thermal Shock Resistance, points		19

Alloy Composition

Carbon (C), %		0 to 0.040
Carbon (C), %		0 to 0.070

Chromium (Cr), %		15 to 17
Chromium (Cr), %		0 to 1.0

Iron (Fe), %		60.9 to 68
Iron (Fe), %		0 to 3.0

Manganese (Mn), %		0 to 2.0
Manganese (Mn), %		0 to 1.0

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

Nickel (Ni), %		17 to 19
Nickel (Ni), %		60.9 to 70

Phosphorus (P), %		0 to 0.045
Phosphorus (P), %		0 to 0.040

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

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