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SAE-AISI A7 Steel vs. N08925 Stainless Steel

Both SAE-AISI A7 steel and N08925 stainless steel are iron alloys. They have 54% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A7 steel and the bottom bar is N08925 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
80
Tensile Strength: Ultimate (UTS), MPa 800 to 2150
680

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 37
13
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 10
33
Density, g/cm3 7.7
8.1
Embodied Carbon, kg CO2/kg material 13
6.2
Embodied Energy, MJ/kg 200
84
Embodied Water, L/kg 100
200

Common Calculations

PREN (Pitting Resistance) 11
44
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 29 to 77
23
Strength to Weight: Bending, points 25 to 48
21
Thermal Diffusivity, mm2/s 10
3.5
Thermal Shock Resistance, points 27 to 72
15

Alloy Composition

Carbon (C), % 2.0 to 2.9
0 to 0.020
Chromium (Cr), % 5.0 to 5.8
19 to 21
Copper (Cu), % 0 to 0.25
0.8 to 1.5
Iron (Fe), % 81.4 to 87.7
42.7 to 50.1
Manganese (Mn), % 0 to 0.8
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.4
6.0 to 7.0
Nickel (Ni), % 0 to 0.3
24 to 26
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0.5 to 1.5
0
Vanadium (V), % 3.9 to 5.2
0