SAE-AISI A7 Steel vs. 50Cr-50Ni Alloy

SAE-AISI A7 steel belongs to the iron alloys classification, while 50Cr-50Ni alloy belongs to the otherwise unclassified metals. There are 17 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 50Cr-50Ni alloy.

SAE-AISI A7 (T30107) Air-Hardening Steel 50Cr-50Ni (R20500) Casting Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		210

Poisson's Ratio		0.29
Poisson's Ratio		0.26

Shear Modulus, GPa		72
Shear Modulus, GPa		84

Tensile Strength: Ultimate (UTS), MPa		800 to 2150
Tensile Strength: Ultimate (UTS), MPa		620

Thermal Properties

Latent Heat of Fusion, J/g		260
Latent Heat of Fusion, J/g		350

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		490

Thermal Expansion, µm/m-K		12
Thermal Expansion, µm/m-K		15

Otherwise Unclassified Properties

Base Metal Price, % relative		10
Base Metal Price, % relative		50

Density, g/cm³		7.7
Density, g/cm³		8.0

Embodied Carbon, kg CO₂/kg material		13
Embodied Carbon, kg CO₂/kg material		7.9

Embodied Energy, MJ/kg		200
Embodied Energy, MJ/kg		110

Embodied Water, L/kg		100
Embodied Water, L/kg		350

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		15

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

Strength to Weight: Axial, points		29 to 77
Strength to Weight: Axial, points		21

Strength to Weight: Bending, points		25 to 48
Strength to Weight: Bending, points		20

Thermal Shock Resistance, points		27 to 72
Thermal Shock Resistance, points		14

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.25

Carbon (C), %		2.0 to 2.9
Carbon (C), %		0 to 0.1

Chromium (Cr), %		5.0 to 5.8
Chromium (Cr), %		48 to 52

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

Iron (Fe), %		81.4 to 87.7
Iron (Fe), %		0 to 1.0

Manganese (Mn), %		0 to 0.8
Manganese (Mn), %		0 to 0.3

Molybdenum (Mo), %		0.9 to 1.4
Molybdenum (Mo), %		0

Nickel (Ni), %		0 to 0.3
Nickel (Ni), %		44.5 to 52

Nitrogen (N), %		0
Nitrogen (N), %		0 to 0.3

Phosphorus (P), %		0 to 0.030
Phosphorus (P), %		0 to 0.020

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

Sulfur (S), %		0 to 0.030
Sulfur (S), %		0 to 0.020

Titanium (Ti), %		0
Titanium (Ti), %		0 to 0.5

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

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