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AISI 321H Stainless Steel vs. SAE-AISI D3 Steel

Both AISI 321H stainless steel and SAE-AISI D3 steel are iron alloys. They have 83% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is AISI 321H stainless steel and the bottom bar is SAE-AISI D3 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
9.8 to 15
Fatigue Strength, MPa 200
310 to 940
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
74
Shear Strength, MPa 400
470 to 1220
Tensile Strength: Ultimate (UTS), MPa 580
770 to 2050
Tensile Strength: Yield (Proof), MPa 230
480 to 1550

Thermal Properties

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 16
8.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.2
3.2
Embodied Energy, MJ/kg 46
48
Embodied Water, L/kg 140
100

Common Calculations

PREN (Pitting Resistance) 18
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
97 to 180
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
28 to 74
Strength to Weight: Bending, points 20
24 to 47
Thermal Diffusivity, mm2/s 4.0
8.3
Thermal Shock Resistance, points 12
23 to 63

Alloy Composition

Carbon (C), % 0.040 to 0.1
2.0 to 2.4
Chromium (Cr), % 17 to 19
11 to 13.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 65.4 to 74
80.3 to 87
Manganese (Mn), % 0 to 2.0
0 to 0.6
Nickel (Ni), % 9.0 to 12
0 to 0.3
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
Tungsten (W), % 0
0 to 1.0
Vanadium (V), % 0
0 to 1.0