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S82121 Stainless Steel vs. SAE-AISI M48 Steel

Both S82121 stainless steel and SAE-AISI M48 steel are iron alloys. They have 72% 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 S82121 stainless steel and the bottom bar is SAE-AISI M48 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
78
Tensile Strength: Ultimate (UTS), MPa 730
890 to 2390

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Melting Completion (Liquidus), °C 1430
1670
Melting Onset (Solidus), °C 1380
1620
Specific Heat Capacity, J/kg-K 480
420
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 14
48
Density, g/cm3 7.7
8.7
Embodied Carbon, kg CO2/kg material 2.8
13
Embodied Energy, MJ/kg 40
190
Embodied Water, L/kg 150
160

Common Calculations

PREN (Pitting Resistance) 28
37
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 26
28 to 76
Strength to Weight: Bending, points 23
23 to 45
Thermal Shock Resistance, points 20
26 to 71

Alloy Composition

Carbon (C), % 0 to 0.035
1.4 to 1.5
Chromium (Cr), % 21 to 23
3.5 to 4.0
Cobalt (Co), % 0
8.0 to 10
Copper (Cu), % 0.2 to 1.2
0 to 0.25
Iron (Fe), % 66.7 to 75.4
63.8 to 69.8
Manganese (Mn), % 1.0 to 2.5
0.15 to 0.4
Molybdenum (Mo), % 0.3 to 1.3
4.8 to 5.5
Nickel (Ni), % 2.0 to 4.0
0 to 0.3
Nitrogen (N), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0.15 to 0.4
Sulfur (S), % 0 to 0.010
0 to 0.030
Tungsten (W), % 0
9.5 to 10.5
Vanadium (V), % 0
2.8 to 3.3