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AISI 321 Stainless Steel vs. SAE-AISI D5 Steel

Both AISI 321 stainless steel and SAE-AISI D5 steel are iron alloys. They have 82% 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 AISI 321 stainless steel and the bottom bar is SAE-AISI D5 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34 to 50
5.4 to 14
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
75
Shear Strength, MPa 420 to 460
470 to 1180
Tensile Strength: Ultimate (UTS), MPa 590 to 690
770 to 2030

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Melting Completion (Liquidus), °C 1430
1430
Melting Onset (Solidus), °C 1400
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
27
Thermal Expansion, µm/m-K 17
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
4.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
4.9

Otherwise Unclassified Properties

Base Metal Price, % relative 16
13
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.2
3.5
Embodied Energy, MJ/kg 45
51
Embodied Water, L/kg 140
120

Common Calculations

PREN (Pitting Resistance) 19
15
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21 to 25
28 to 73
Strength to Weight: Bending, points 20 to 22
24 to 46
Thermal Diffusivity, mm2/s 4.1
7.4
Thermal Shock Resistance, points 13 to 15
26 to 67

Alloy Composition

Carbon (C), % 0 to 0.080
1.4 to 1.6
Chromium (Cr), % 17 to 19
11 to 13
Cobalt (Co), % 0
2.5 to 3.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 65.3 to 74
77.9 to 84.4
Manganese (Mn), % 0 to 2.0
0 to 0.6
Molybdenum (Mo), % 0
0.7 to 1.2
Nickel (Ni), % 9.0 to 12
0 to 0.3
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 0.75
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0 to 0.7
0
Vanadium (V), % 0
0 to 1.0