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SAE-AISI D3 Steel vs. S43940 Stainless Steel

Both SAE-AISI D3 steel and S43940 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI D3 steel and the bottom bar is S43940 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 9.8 to 15
21
Fatigue Strength, MPa 310 to 940
180
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 74
77
Shear Strength, MPa 470 to 1220
310
Tensile Strength: Ultimate (UTS), MPa 770 to 2050
490
Tensile Strength: Yield (Proof), MPa 480 to 1550
280

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 31
25
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
12
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 3.2
2.6
Embodied Energy, MJ/kg 48
38
Embodied Water, L/kg 100
120

Common Calculations

PREN (Pitting Resistance) 13
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 97 to 180
86
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28 to 74
18
Strength to Weight: Bending, points 24 to 47
18
Thermal Diffusivity, mm2/s 8.3
6.8
Thermal Shock Resistance, points 23 to 63
18

Alloy Composition

Carbon (C), % 2.0 to 2.4
0 to 0.030
Chromium (Cr), % 11 to 13.5
17.5 to 18.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 80.3 to 87
78.2 to 82.1
Manganese (Mn), % 0 to 0.6
0 to 1.0
Nickel (Ni), % 0 to 0.3
0
Niobium (Nb), % 0
0.3 to 0.6
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0
0.1 to 0.6
Tungsten (W), % 0 to 1.0
0
Vanadium (V), % 0 to 1.0
0