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EN 1.4988 Stainless Steel vs. SAE-AISI T8 Steel

Both EN 1.4988 stainless steel and SAE-AISI T8 steel are iron alloys. They have 72% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is EN 1.4988 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
Tensile Strength: Ultimate (UTS), MPa 640
780 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Melting Completion (Liquidus), °C 1450
1730
Melting Onset (Solidus), °C 1400
1670
Specific Heat Capacity, J/kg-K 470
420
Thermal Conductivity, W/m-K 15
18
Thermal Expansion, µm/m-K 16
12

Otherwise Unclassified Properties

Base Metal Price, % relative 23
45
Density, g/cm3 7.9
9.0
Embodied Carbon, kg CO2/kg material 6.0
10
Embodied Energy, MJ/kg 89
160
Embodied Water, L/kg 150
120

Common Calculations

PREN (Pitting Resistance) 22
30
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 23
24 to 66
Strength to Weight: Bending, points 21
21 to 41
Thermal Diffusivity, mm2/s 4.0
4.8
Thermal Shock Resistance, points 14
24 to 66

Alloy Composition

Carbon (C), % 0.040 to 0.1
0.75 to 0.85
Chromium (Cr), % 15.5 to 17.5
3.8 to 4.5
Cobalt (Co), % 0
4.3 to 5.8
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 62.1 to 69.5
69.3 to 75.4
Manganese (Mn), % 0 to 1.5
0.2 to 0.4
Molybdenum (Mo), % 1.1 to 1.5
0.4 to 1.0
Nickel (Ni), % 12.5 to 14.5
0 to 0.3
Niobium (Nb), % 0.4 to 1.2
0
Nitrogen (N), % 0.060 to 0.14
0
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.3 to 0.6
0.2 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 0
13.3 to 14.8
Vanadium (V), % 0.6 to 0.85
1.8 to 2.4