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SAE-AISI A7 Steel vs. S64512 Stainless Steel

Both SAE-AISI A7 steel and S64512 stainless steel are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A7 steel and the bottom bar is S64512 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
76
Tensile Strength: Ultimate (UTS), MPa 800 to 2150
1140

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 37
28
Thermal Expansion, µm/m-K 12
10

Otherwise Unclassified Properties

Base Metal Price, % relative 10
10
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 13
3.3
Embodied Energy, MJ/kg 200
47
Embodied Water, L/kg 100
110

Common Calculations

PREN (Pitting Resistance) 11
18
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29 to 77
40
Strength to Weight: Bending, points 25 to 48
31
Thermal Diffusivity, mm2/s 10
7.5
Thermal Shock Resistance, points 27 to 72
42

Alloy Composition

Carbon (C), % 2.0 to 2.9
0.080 to 0.15
Chromium (Cr), % 5.0 to 5.8
11 to 12.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 81.4 to 87.7
80.6 to 84.7
Manganese (Mn), % 0 to 0.8
0.5 to 0.9
Molybdenum (Mo), % 0.9 to 1.4
1.5 to 2.0
Nickel (Ni), % 0 to 0.3
2.0 to 3.0
Nitrogen (N), % 0
0.010 to 0.050
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.025
Tungsten (W), % 0.5 to 1.5
0
Vanadium (V), % 3.9 to 5.2
0.25 to 0.4