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AISI 309HCb Stainless Steel vs. Nickel 685

AISI 309HCb stainless steel belongs to the iron alloys classification, while nickel 685 belongs to the nickel alloys. They have a modest 35% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is AISI 309HCb stainless steel and the bottom bar is nickel 685.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
350
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 46
17
Fatigue Strength, MPa 210
470
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
77
Shear Strength, MPa 410
770
Tensile Strength: Ultimate (UTS), MPa 590
1250
Tensile Strength: Yield (Proof), MPa 230
850

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Maximum Temperature: Mechanical, °C 1090
1000
Melting Completion (Liquidus), °C 1420
1380
Melting Onset (Solidus), °C 1380
1330
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 16
12

Otherwise Unclassified Properties

Base Metal Price, % relative 23
75
Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 4.1
10
Embodied Energy, MJ/kg 59
140
Embodied Water, L/kg 170
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
190
Resilience: Unit (Modulus of Resilience), kJ/m3 130
1820
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 21
42
Strength to Weight: Bending, points 20
31
Thermal Diffusivity, mm2/s 4.0
3.3
Thermal Shock Resistance, points 13
37

Alloy Composition

Aluminum (Al), % 0
1.2 to 1.6
Boron (B), % 0
0.0030 to 0.010
Carbon (C), % 0.040 to 0.1
0.030 to 0.1
Chromium (Cr), % 22 to 24
18 to 21
Cobalt (Co), % 0
12 to 15
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 56 to 66
0 to 2.0
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0
3.5 to 5.0
Nickel (Ni), % 12 to 16
49.6 to 62.5
Niobium (Nb), % 0 to 1.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 0.75
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
2.8 to 3.3
Zinc (Zn), % 0
0.020 to 0.12