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SAE-AISI T5 Steel vs. AISI 409 Stainless Steel

Both SAE-AISI T5 steel and AISI 409 stainless steel are iron alloys. They have 70% of their average alloy composition in common. There are 22 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 SAE-AISI T5 steel and the bottom bar is AISI 409 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 80
75
Tensile Strength: Ultimate (UTS), MPa 860 to 2140
420

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Melting Completion (Liquidus), °C 1810
1450
Melting Onset (Solidus), °C 1750
1400
Specific Heat Capacity, J/kg-K 410
480
Thermal Conductivity, W/m-K 21
25
Thermal Expansion, µm/m-K 11
11

Otherwise Unclassified Properties

Base Metal Price, % relative 60
6.5
Density, g/cm3 9.4
7.7
Embodied Carbon, kg CO2/kg material 11
2.0
Embodied Energy, MJ/kg 170
28
Embodied Water, L/kg 140
94

Common Calculations

PREN (Pitting Resistance) 37
11
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 25 to 63
15
Strength to Weight: Bending, points 21 to 39
16
Thermal Diffusivity, mm2/s 5.5
6.7
Thermal Shock Resistance, points 26 to 66
15

Alloy Composition

Carbon (C), % 0.75 to 0.85
0 to 0.080
Chromium (Cr), % 3.8 to 5.0
10.5 to 11.7
Cobalt (Co), % 7.0 to 9.5
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 60.6 to 68.3
84.9 to 89.5
Manganese (Mn), % 0.2 to 0.4
0 to 1.0
Molybdenum (Mo), % 0.5 to 1.3
0
Nickel (Ni), % 0 to 0.3
0 to 0.5
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
Titanium (Ti), % 0
0 to 0.75
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 1.8 to 2.4
0