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EN 1.4740 Stainless Steel vs. SAE-AISI T8 Steel

Both EN 1.4740 stainless steel and SAE-AISI T8 steel are iron alloys. They have 78% of their average alloy composition in common. There are 18 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 EN 1.4740 stainless steel and the bottom bar is SAE-AISI T8 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
78

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1420
1730
Melting Onset (Solidus), °C 1370
1670
Specific Heat Capacity, J/kg-K 490
420
Thermal Conductivity, W/m-K 18
18
Thermal Expansion, µm/m-K 10
12

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
45
Density, g/cm3 7.6
9.0
Embodied Carbon, kg CO2/kg material 2.3
10
Embodied Energy, MJ/kg 32
160
Embodied Water, L/kg 120
120

Common Calculations

PREN (Pitting Resistance) 18
30
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
22
Thermal Diffusivity, mm2/s 4.8
4.8

Alloy Composition

Carbon (C), % 0.3 to 0.5
0.75 to 0.85
Chromium (Cr), % 16 to 19
3.8 to 4.5
Cobalt (Co), % 0
4.3 to 5.8
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 75.4 to 82.7
69.3 to 75.4
Manganese (Mn), % 0 to 1.0
0.2 to 0.4
Molybdenum (Mo), % 0 to 0.5
0.4 to 1.0
Nickel (Ni), % 0 to 1.0
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 1.0 to 2.5
0.2 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
13.3 to 14.8
Vanadium (V), % 0
1.8 to 2.4