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S81921 Stainless Steel vs. Grade TDSiCr Steel

Both S81921 stainless steel and grade TDSiCr steel are iron alloys. They have 73% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is S81921 stainless steel and the bottom bar is grade TDSiCr steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
590
Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
80
Tensile Strength: Ultimate (UTS), MPa 710
1950

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Mechanical, °C 990
410
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
46
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 14
2.2
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.9
1.5
Embodied Energy, MJ/kg 41
20
Embodied Water, L/kg 150
48

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
70
Strength to Weight: Bending, points 23
45
Thermal Diffusivity, mm2/s 4.0
12
Thermal Shock Resistance, points 20
58

Alloy Composition

Carbon (C), % 0 to 0.030
0.5 to 0.6
Chromium (Cr), % 19 to 22
0.5 to 0.8
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 66.7 to 75.9
96.6 to 97.8
Manganese (Mn), % 2.0 to 4.0
0.5 to 0.9
Molybdenum (Mo), % 1.0 to 2.0
0
Nickel (Ni), % 2.0 to 4.0
0
Nitrogen (N), % 0.14 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
1.2 to 1.6
Sulfur (S), % 0 to 0.030
0 to 0.020