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EN 1.4740 Stainless Steel vs. SAE-AISI T4 Steel

Both EN 1.4740 stainless steel and SAE-AISI T4 steel are iron alloys. They have 75% 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 T4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
80

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1420
1810
Melting Onset (Solidus), °C 1370
1750
Specific Heat Capacity, J/kg-K 490
410
Thermal Conductivity, W/m-K 18
21
Thermal Expansion, µm/m-K 10
12

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
55
Density, g/cm3 7.6
9.4
Embodied Carbon, kg CO2/kg material 2.3
8.5
Embodied Energy, MJ/kg 32
130
Embodied Water, L/kg 120
120

Common Calculations

PREN (Pitting Resistance) 18
37
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
21
Thermal Diffusivity, mm2/s 4.8
5.4

Alloy Composition

Carbon (C), % 0.3 to 0.5
0.7 to 0.8
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
66.3 to 72.3
Manganese (Mn), % 0 to 1.0
0.1 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
17.5 to 19
Vanadium (V), % 0
0.8 to 1.2