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SAE-AISI A2 Steel vs. N08031 Stainless Steel

Both SAE-AISI A2 steel and N08031 stainless steel are iron alloys. They have 40% 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 A2 steel and the bottom bar is N08031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
81
Tensile Strength: Ultimate (UTS), MPa 710 to 2040
730

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 38
12
Thermal Expansion, µm/m-K 11
18

Otherwise Unclassified Properties

Base Metal Price, % relative 5.5
39
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 2.7
7.1
Embodied Energy, MJ/kg 38
96
Embodied Water, L/kg 73
240

Common Calculations

PREN (Pitting Resistance) 8.9
52
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 73
25
Strength to Weight: Bending, points 23 to 46
22
Thermal Diffusivity, mm2/s 10
3.1
Thermal Shock Resistance, points 25 to 71
14

Alloy Composition

Carbon (C), % 1.0 to 1.1
0 to 0.015
Chromium (Cr), % 4.8 to 5.5
26 to 28
Copper (Cu), % 0 to 0.25
1.0 to 1.4
Iron (Fe), % 89.4 to 93.3
29 to 36.9
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.4
6.0 to 7.0
Nickel (Ni), % 0 to 0.3
30 to 32
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0 to 0.5
0 to 0.3
Sulfur (S), % 0 to 0.030
0 to 0.010
Vanadium (V), % 0.15 to 0.5
0