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SAE-AISI A7 Steel vs. S35500 Stainless Steel

Both SAE-AISI A7 steel and S35500 stainless steel are iron alloys. They have 83% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A7 steel and the bottom bar is S35500 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
78
Tensile Strength: Ultimate (UTS), MPa 800 to 2150
1330 to 1490

Thermal Properties

Latent Heat of Fusion, J/g 260
280
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
16
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 10
16
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 13
3.5
Embodied Energy, MJ/kg 200
47
Embodied Water, L/kg 100
130

Common Calculations

PREN (Pitting Resistance) 11
27
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29 to 77
47 to 53
Strength to Weight: Bending, points 25 to 48
34 to 37
Thermal Diffusivity, mm2/s 10
4.4
Thermal Shock Resistance, points 27 to 72
44 to 49

Alloy Composition

Carbon (C), % 2.0 to 2.9
0.1 to 0.15
Chromium (Cr), % 5.0 to 5.8
15 to 16
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 81.4 to 87.7
73.2 to 77.7
Manganese (Mn), % 0 to 0.8
0.5 to 1.3
Molybdenum (Mo), % 0.9 to 1.4
2.5 to 3.2
Nickel (Ni), % 0 to 0.3
4.0 to 5.0
Niobium (Nb), % 0
0.1 to 0.5
Nitrogen (N), % 0
0.070 to 0.13
Phosphorus (P), % 0 to 0.030
0 to 0.040
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