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SAE-AISI D3 Steel vs. S21640 Stainless Steel

Both SAE-AISI D3 steel and S21640 stainless steel are iron alloys. They have 82% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI D3 steel and the bottom bar is S21640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 9.8 to 15
46
Fatigue Strength, MPa 310 to 940
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 74
78
Shear Strength, MPa 470 to 1220
520
Tensile Strength: Ultimate (UTS), MPa 770 to 2050
740
Tensile Strength: Yield (Proof), MPa 480 to 1550
350

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1430
1430
Melting Onset (Solidus), °C 1390
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 31
15
Thermal Expansion, µm/m-K 12
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
17
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 3.2
3.6
Embodied Energy, MJ/kg 48
51
Embodied Water, L/kg 100
150

Common Calculations

PREN (Pitting Resistance) 13
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 97 to 180
280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28 to 74
27
Strength to Weight: Bending, points 24 to 47
23
Thermal Diffusivity, mm2/s 8.3
4.0
Thermal Shock Resistance, points 23 to 63
16

Alloy Composition

Carbon (C), % 2.0 to 2.4
0 to 0.080
Chromium (Cr), % 11 to 13.5
17.5 to 19.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 80.3 to 87
63 to 74.3
Manganese (Mn), % 0 to 0.6
3.5 to 6.5
Molybdenum (Mo), % 0
0.5 to 2.0
Nickel (Ni), % 0 to 0.3
4.0 to 6.5
Niobium (Nb), % 0
0.1 to 1.0
Nitrogen (N), % 0
0.080 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.060
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0 to 1.0
0
Vanadium (V), % 0 to 1.0
0