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AISI 418 Stainless Steel vs. SAE-AISI T2 Steel

Both AISI 418 stainless steel and SAE-AISI T2 steel are iron alloys. They have 82% 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 AISI 418 stainless steel and the bottom bar is SAE-AISI T2 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 77
79
Tensile Strength: Ultimate (UTS), MPa 1100
780 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Melting Completion (Liquidus), °C 1500
1820
Melting Onset (Solidus), °C 1460
1760
Specific Heat Capacity, J/kg-K 470
410
Thermal Conductivity, W/m-K 25
19
Thermal Expansion, µm/m-K 10
12

Otherwise Unclassified Properties

Base Metal Price, % relative 15
46
Density, g/cm3 8.0
9.3
Embodied Carbon, kg CO2/kg material 2.9
11
Embodied Energy, MJ/kg 41
170
Embodied Water, L/kg 110
98

Common Calculations

PREN (Pitting Resistance) 19
36
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 24
21
Strength to Weight: Axial, points 38
23 to 64
Strength to Weight: Bending, points 29
20 to 40
Thermal Diffusivity, mm2/s 6.7
4.9
Thermal Shock Resistance, points 40
23 to 65

Alloy Composition

Carbon (C), % 0.15 to 0.2
0.8 to 0.9
Chromium (Cr), % 12 to 14
3.8 to 4.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 78.5 to 83.6
70.8 to 75.8
Manganese (Mn), % 0 to 0.5
0.2 to 0.4
Molybdenum (Mo), % 0 to 0.5
0 to 1.0
Nickel (Ni), % 1.8 to 2.2
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 0.5
0.2 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 2.5 to 3.5
17.5 to 19
Vanadium (V), % 0
1.8 to 2.4