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S31803 Stainless Steel vs. Nickel 689

S31803 stainless steel belongs to the iron alloys classification, while nickel 689 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 28 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 S31803 stainless steel and the bottom bar is nickel 689.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
350
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 29
23
Fatigue Strength, MPa 370
420
Poisson's Ratio 0.27
0.29
Reduction in Area, % 50
21
Shear Modulus, GPa 80
80
Shear Strength, MPa 460
790
Tensile Strength: Ultimate (UTS), MPa 710
1250
Tensile Strength: Yield (Proof), MPa 500
690

Thermal Properties

Latent Heat of Fusion, J/g 300
330
Maximum Temperature: Mechanical, °C 1060
990
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1400
1390
Specific Heat Capacity, J/kg-K 480
450
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 17
70
Density, g/cm3 7.8
8.5
Embodied Carbon, kg CO2/kg material 3.6
11
Embodied Energy, MJ/kg 49
150
Embodied Water, L/kg 160
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
240
Resilience: Unit (Modulus of Resilience), kJ/m3 630
1170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 25
41
Strength to Weight: Bending, points 23
30
Thermal Shock Resistance, points 20
35

Alloy Composition

Aluminum (Al), % 0
0.75 to 1.3
Boron (B), % 0
0.0030 to 0.010
Carbon (C), % 0 to 0.030
0.1 to 0.2
Chromium (Cr), % 21 to 23
18 to 20
Cobalt (Co), % 0
9.0 to 11
Iron (Fe), % 63.7 to 71.9
0 to 5.0
Manganese (Mn), % 0 to 2.0
0 to 0.5
Molybdenum (Mo), % 2.5 to 3.5
9.0 to 10.5
Nickel (Ni), % 4.5 to 6.5
48.3 to 60.9
Nitrogen (N), % 0.080 to 0.2
0
Phosphorus (P), % 0 to 0.030
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.020
0 to 0.015
Titanium (Ti), % 0
2.3 to 2.8