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SAE-AISI D5 Steel vs. S21904 Stainless Steel

Both SAE-AISI D5 steel and S21904 stainless steel are iron alloys. They have 76% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI D5 steel and the bottom bar is S21904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 5.4 to 14
17 to 51
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
78
Shear Strength, MPa 470 to 1180
510 to 620
Tensile Strength: Ultimate (UTS), MPa 770 to 2030
700 to 1000

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1430
1400
Melting Onset (Solidus), °C 1390
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 27
14
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.2
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 4.9
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 13
15
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 3.5
3.0
Embodied Energy, MJ/kg 51
43
Embodied Water, L/kg 120
160

Common Calculations

PREN (Pitting Resistance) 15
25
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28 to 73
25 to 36
Strength to Weight: Bending, points 24 to 46
23 to 29
Thermal Diffusivity, mm2/s 7.4
3.8
Thermal Shock Resistance, points 26 to 67
15 to 21

Alloy Composition

Carbon (C), % 1.4 to 1.6
0 to 0.040
Chromium (Cr), % 11 to 13
19 to 21.5
Cobalt (Co), % 2.5 to 3.5
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 77.9 to 84.4
59.5 to 67.4
Manganese (Mn), % 0 to 0.6
8.0 to 10
Molybdenum (Mo), % 0.7 to 1.2
0
Nickel (Ni), % 0 to 0.3
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0 to 1.0
0

Comparable Variants