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AISI 440A Stainless Steel vs. Nickel 693

AISI 440A stainless steel belongs to the iron alloys classification, while nickel 693 belongs to the nickel alloys. They have a modest 22% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 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 AISI 440A stainless steel and the bottom bar is nickel 693.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 5.0 to 20
34
Fatigue Strength, MPa 270 to 790
230
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 450 to 1040
440
Tensile Strength: Ultimate (UTS), MPa 730 to 1790
660
Tensile Strength: Yield (Proof), MPa 420 to 1650
310

Thermal Properties

Latent Heat of Fusion, J/g 280
330
Maximum Temperature: Mechanical, °C 760
1010
Melting Completion (Liquidus), °C 1480
1350
Melting Onset (Solidus), °C 1370
1310
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 23
9.1
Thermal Expansion, µm/m-K 10
13

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
60
Density, g/cm3 7.7
8.1
Embodied Carbon, kg CO2/kg material 2.2
9.9
Embodied Energy, MJ/kg 31
140
Embodied Water, L/kg 120
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 120
190
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 26 to 65
23
Strength to Weight: Bending, points 23 to 43
21
Thermal Diffusivity, mm2/s 6.2
2.3
Thermal Shock Resistance, points 26 to 65
19

Alloy Composition

Aluminum (Al), % 0
2.5 to 4.0
Carbon (C), % 0.6 to 0.75
0 to 0.15
Chromium (Cr), % 16 to 18
27 to 31
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 78.4 to 83.4
2.5 to 6.0
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.75
0
Nickel (Ni), % 0
53.3 to 67.5
Niobium (Nb), % 0
0.5 to 2.5
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.010
Titanium (Ti), % 0
0 to 1.0