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AISI 205 Stainless Steel vs. Nickel 684

AISI 205 stainless steel belongs to the iron alloys classification, while nickel 684 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 (3, in this case) are not shown.

For each property being compared, the top bar is AISI 205 stainless steel and the bottom bar is nickel 684.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 440
310
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11 to 51
11
Fatigue Strength, MPa 410 to 640
390
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
76
Shear Strength, MPa 560 to 850
710
Tensile Strength: Ultimate (UTS), MPa 800 to 1430
1190
Tensile Strength: Yield (Proof), MPa 450 to 1100
800

Thermal Properties

Latent Heat of Fusion, J/g 280
320
Maximum Temperature: Mechanical, °C 880
1000
Melting Completion (Liquidus), °C 1380
1370
Melting Onset (Solidus), °C 1340
1320
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 18
13

Otherwise Unclassified Properties

Base Metal Price, % relative 11
75
Density, g/cm3 7.6
8.3
Embodied Carbon, kg CO2/kg material 2.6
10
Embodied Energy, MJ/kg 37
140
Embodied Water, L/kg 150
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 430
120
Resilience: Unit (Modulus of Resilience), kJ/m3 510 to 3060
1610
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 26
23
Strength to Weight: Axial, points 29 to 52
40
Strength to Weight: Bending, points 25 to 37
30
Thermal Shock Resistance, points 16 to 29
34

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.3
Boron (B), % 0
0.0030 to 0.010
Carbon (C), % 0.12 to 0.25
0 to 0.15
Chromium (Cr), % 16.5 to 18.5
15 to 20
Cobalt (Co), % 0
13 to 20
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 62.6 to 68.1
0 to 4.0
Manganese (Mn), % 14 to 15.5
0 to 0.75
Molybdenum (Mo), % 0
3.0 to 5.0
Nickel (Ni), % 1.0 to 1.7
42.7 to 64
Nitrogen (N), % 0.32 to 0.4
0
Phosphorus (P), % 0 to 0.060
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0
2.5 to 3.3