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AISI 321 Stainless Steel vs. Grade CW6M Nickel

AISI 321 stainless steel belongs to the iron alloys classification, while grade CW6M nickel belongs to the nickel alloys. They have a modest 31% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is AISI 321 stainless steel and the bottom bar is grade CW6M nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 34 to 50
29
Fatigue Strength, MPa 220 to 270
210
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
84
Tensile Strength: Ultimate (UTS), MPa 590 to 690
560
Tensile Strength: Yield (Proof), MPa 220 to 350
310

Thermal Properties

Latent Heat of Fusion, J/g 290
330
Maximum Temperature: Mechanical, °C 870
970
Melting Completion (Liquidus), °C 1430
1530
Melting Onset (Solidus), °C 1400
1470
Specific Heat Capacity, J/kg-K 480
430
Thermal Expansion, µm/m-K 17
12

Otherwise Unclassified Properties

Base Metal Price, % relative 16
65
Density, g/cm3 7.8
8.8
Embodied Carbon, kg CO2/kg material 3.2
13
Embodied Energy, MJ/kg 45
170
Embodied Water, L/kg 140
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 230
140
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 310
220
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 21 to 25
18
Strength to Weight: Bending, points 20 to 22
17
Thermal Shock Resistance, points 13 to 15
16

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.070
Chromium (Cr), % 17 to 19
17 to 20
Iron (Fe), % 65.3 to 74
0 to 3.0
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0
17 to 20
Nickel (Ni), % 9.0 to 12
54.9 to 66
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0 to 0.7
0