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SAE-AISI T4 Steel vs. AISI 317LMN Stainless Steel

Both SAE-AISI T4 steel and AISI 317LMN stainless steel are iron alloys. They have 65% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (13, 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 317LMN 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
79
Tensile Strength: Ultimate (UTS), MPa 800 to 2140
620

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Melting Completion (Liquidus), °C 1810
1460
Melting Onset (Solidus), °C 1750
1410
Specific Heat Capacity, J/kg-K 410
470
Thermal Conductivity, W/m-K 21
14
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 55
24
Density, g/cm3 9.4
8.0
Embodied Carbon, kg CO2/kg material 8.5
4.8
Embodied Energy, MJ/kg 130
65
Embodied Water, L/kg 120
170

Common Calculations

PREN (Pitting Resistance) 37
36
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 24 to 64
22
Strength to Weight: Bending, points 20 to 39
20
Thermal Diffusivity, mm2/s 5.4
3.8
Thermal Shock Resistance, points 24 to 64
14

Alloy Composition

Carbon (C), % 0.7 to 0.8
0 to 0.030
Chromium (Cr), % 3.8 to 4.5
17 to 20
Cobalt (Co), % 4.3 to 5.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 66.3 to 72.3
54.4 to 65.4
Manganese (Mn), % 0.1 to 0.4
0 to 2.0
Molybdenum (Mo), % 0.4 to 1.0
4.0 to 5.0
Nickel (Ni), % 0 to 0.3
13.5 to 17.5
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0.2 to 0.4
0 to 0.75
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