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S21904 Stainless Steel vs. SAE-AISI T6 Steel

Both S21904 stainless steel and SAE-AISI T6 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 (11, in this case) are not shown.

For each property being compared, the top bar is S21904 stainless steel and the bottom bar is SAE-AISI T6 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 78
81
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
880 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Melting Completion (Liquidus), °C 1400
1830
Melting Onset (Solidus), °C 1350
1770
Specific Heat Capacity, J/kg-K 480
400
Thermal Conductivity, W/m-K 14
18
Thermal Expansion, µm/m-K 17
12

Otherwise Unclassified Properties

Base Metal Price, % relative 15
70
Density, g/cm3 7.7
9.5
Embodied Carbon, kg CO2/kg material 3.0
11
Embodied Energy, MJ/kg 43
170
Embodied Water, L/kg 160
160

Common Calculations

PREN (Pitting Resistance) 25
39
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
21
Strength to Weight: Axial, points 25 to 36
26 to 63
Strength to Weight: Bending, points 23 to 29
21 to 39
Thermal Diffusivity, mm2/s 3.8
4.7
Thermal Shock Resistance, points 15 to 21
26 to 64

Alloy Composition

Carbon (C), % 0 to 0.040
0.75 to 0.85
Chromium (Cr), % 19 to 21.5
4.0 to 4.8
Cobalt (Co), % 0
11 to 13
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 59.5 to 67.4
55.9 to 63.5
Manganese (Mn), % 8.0 to 10
0.2 to 0.4
Molybdenum (Mo), % 0
0.4 to 1.0
Nickel (Ni), % 5.5 to 7.5
0 to 0.3
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 1.0
0.2 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
18.5 to 21
Vanadium (V), % 0
1.5 to 2.1

Comparable Variants