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SAE-AISI A9 Steel vs. S28200 Stainless Steel

Both SAE-AISI A9 steel and S28200 stainless steel are iron alloys. They have 68% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A9 steel and the bottom bar is S28200 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 74
77
Tensile Strength: Ultimate (UTS), MPa 770 to 2030
870

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Melting Completion (Liquidus), °C 1460
1380
Melting Onset (Solidus), °C 1410
1330
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 12
18

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
12
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 4.7
2.8
Embodied Energy, MJ/kg 70
41
Embodied Water, L/kg 82
160

Common Calculations

PREN (Pitting Resistance) 10
29
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 28 to 73
32
Strength to Weight: Bending, points 24 to 46
27
Thermal Shock Resistance, points 25 to 66
17

Alloy Composition

Carbon (C), % 0.45 to 0.55
0 to 0.15
Chromium (Cr), % 4.8 to 5.5
17 to 19
Copper (Cu), % 0 to 0.25
0.75 to 1.3
Iron (Fe), % 87 to 90.5
57.7 to 64.1
Manganese (Mn), % 0 to 0.5
17 to 19
Molybdenum (Mo), % 1.3 to 1.8
0.75 to 1.3
Nickel (Ni), % 1.3 to 1.8
0
Nitrogen (N), % 0
0.4 to 0.6
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 1.0 to 1.2
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.8 to 1.4
0