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SAE-AISI T4 Steel vs. AISI 384 Stainless Steel

Both SAE-AISI T4 steel and AISI 384 stainless steel are iron alloys. They have 69% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI T4 steel and the bottom bar is AISI 384 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 80
76
Tensile Strength: Ultimate (UTS), MPa 800 to 2140
480

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Melting Completion (Liquidus), °C 1810
1420
Melting Onset (Solidus), °C 1750
1380
Specific Heat Capacity, J/kg-K 410
480
Thermal Conductivity, W/m-K 21
16
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 55
20
Density, g/cm3 9.4
7.9
Embodied Carbon, kg CO2/kg material 8.5
3.7
Embodied Energy, MJ/kg 130
52
Embodied Water, L/kg 120
150

Common Calculations

PREN (Pitting Resistance) 37
16
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 24 to 64
17
Strength to Weight: Bending, points 20 to 39
17
Thermal Diffusivity, mm2/s 5.4
4.3
Thermal Shock Resistance, points 24 to 64
11

Alloy Composition

Carbon (C), % 0.7 to 0.8
0 to 0.040
Chromium (Cr), % 3.8 to 4.5
15 to 17
Cobalt (Co), % 4.3 to 5.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 66.3 to 72.3
60.9 to 68
Manganese (Mn), % 0.1 to 0.4
0 to 2.0
Molybdenum (Mo), % 0.4 to 1.0
0
Nickel (Ni), % 0 to 0.3
17 to 19
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0.2 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 0.8 to 1.2
0