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AISI 304 Stainless Steel vs. Grade CW6M Nickel

AISI 304 stainless steel belongs to the iron alloys classification, while grade CW6M nickel belongs to the nickel alloys. They have a modest 30% 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 (9, in this case) are not shown.

For each property being compared, the top bar is AISI 304 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, % 8.0 to 43
29
Fatigue Strength, MPa 210 to 440
210
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
84
Tensile Strength: Ultimate (UTS), MPa 580 to 1180
560
Tensile Strength: Yield (Proof), MPa 230 to 860
310

Thermal Properties

Latent Heat of Fusion, J/g 290
330
Maximum Temperature: Mechanical, °C 710
970
Melting Completion (Liquidus), °C 1450
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 15
65
Density, g/cm3 7.8
8.8
Embodied Carbon, kg CO2/kg material 3.0
13
Embodied Energy, MJ/kg 43
170
Embodied Water, L/kg 150
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 86 to 250
140
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 1870
220
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 21 to 42
18
Strength to Weight: Bending, points 20 to 32
17
Thermal Shock Resistance, points 12 to 25
16

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.070
Chromium (Cr), % 18 to 20
17 to 20
Iron (Fe), % 66.5 to 74
0 to 3.0
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0
17 to 20
Nickel (Ni), % 8.0 to 10.5
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