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S21800 Stainless Steel vs. SAE-AISI T2 Steel

Both S21800 stainless steel and SAE-AISI T2 steel are iron alloys. They have 67% of their average alloy composition in common. There are 20 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 S21800 stainless steel and the bottom bar is SAE-AISI T2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
79
Tensile Strength: Ultimate (UTS), MPa 740
780 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 340
250
Melting Completion (Liquidus), °C 1360
1820
Melting Onset (Solidus), °C 1310
1760
Specific Heat Capacity, J/kg-K 500
410
Thermal Expansion, µm/m-K 16
12

Otherwise Unclassified Properties

Base Metal Price, % relative 15
46
Density, g/cm3 7.5
9.3
Embodied Carbon, kg CO2/kg material 3.1
11
Embodied Energy, MJ/kg 45
170
Embodied Water, L/kg 150
98

Common Calculations

PREN (Pitting Resistance) 19
36
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 26
21
Strength to Weight: Axial, points 27
23 to 64
Strength to Weight: Bending, points 24
20 to 40
Thermal Shock Resistance, points 17
23 to 65

Alloy Composition

Carbon (C), % 0 to 0.1
0.8 to 0.9
Chromium (Cr), % 16 to 18
3.8 to 4.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 59.1 to 65.4
70.8 to 75.8
Manganese (Mn), % 7.0 to 9.0
0.2 to 0.4
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 8.0 to 9.0
0 to 0.3
Nitrogen (N), % 0.080 to 0.18
0
Phosphorus (P), % 0 to 0.060
0 to 0.030
Silicon (Si), % 3.5 to 4.5
0.2 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
17.5 to 19
Vanadium (V), % 0
1.8 to 2.4