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S81921 Stainless Steel vs. SAE-AISI T1 Steel

Both S81921 stainless steel and SAE-AISI T1 steel are iron alloys. They have 76% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is S81921 stainless steel and the bottom bar is SAE-AISI T1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
80
Tensile Strength: Ultimate (UTS), MPa 710
770 to 2130

Thermal Properties

Latent Heat of Fusion, J/g 290
240
Melting Completion (Liquidus), °C 1430
1810
Melting Onset (Solidus), °C 1390
1750
Specific Heat Capacity, J/kg-K 480
410
Thermal Conductivity, W/m-K 15
20
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 14
45
Density, g/cm3 7.7
9.3
Embodied Carbon, kg CO2/kg material 2.9
8.2
Embodied Energy, MJ/kg 41
130
Embodied Water, L/kg 150
90

Common Calculations

PREN (Pitting Resistance) 28
34
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
21
Strength to Weight: Axial, points 25
23 to 64
Strength to Weight: Bending, points 23
20 to 40
Thermal Diffusivity, mm2/s 4.0
5.2
Thermal Shock Resistance, points 20
23 to 64

Alloy Composition

Carbon (C), % 0 to 0.030
0.65 to 0.8
Chromium (Cr), % 19 to 22
3.8 to 4.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 66.7 to 75.9
73.2 to 77.2
Manganese (Mn), % 2.0 to 4.0
0.1 to 0.4
Molybdenum (Mo), % 1.0 to 2.0
0
Nickel (Ni), % 2.0 to 4.0
0 to 0.3
Nitrogen (N), % 0.14 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0.2 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
17.3 to 18.8
Vanadium (V), % 0
0.9 to 1.3