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AISI 420 Stainless Steel vs. Grade TDC Steel

Both AISI 420 stainless steel and grade TDC steel are iron alloys. They have 86% 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 AISI 420 stainless steel and the bottom bar is grade TDC steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
510
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
80
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
1700

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 620
400
Melting Completion (Liquidus), °C 1510
1450
Melting Onset (Solidus), °C 1450
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 27
51
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
1.9
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.4
Embodied Energy, MJ/kg 28
19
Embodied Water, L/kg 100
47

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 62
60
Strength to Weight: Bending, points 22 to 41
40
Thermal Diffusivity, mm2/s 7.3
14
Thermal Shock Resistance, points 25 to 62
50

Alloy Composition

Carbon (C), % 0.15 to 0.4
0.6 to 0.75
Chromium (Cr), % 12 to 14
0 to 0.3
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 82.3 to 87.9
98 to 99.4
Manganese (Mn), % 0 to 1.0
0.5 to 1.2
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 0.75
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0.1 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.020