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AISI 348H Stainless Steel vs. Nickel 684

AISI 348H stainless steel belongs to the iron alloys classification, while nickel 684 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 AISI 348H stainless steel and the bottom bar is nickel 684.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
310
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
11
Fatigue Strength, MPa 200
390
Poisson's Ratio 0.28
0.29
Reduction in Area, % 51
17
Shear Modulus, GPa 77
76
Shear Strength, MPa 400
710
Tensile Strength: Ultimate (UTS), MPa 580
1190
Tensile Strength: Yield (Proof), MPa 230
800

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Maximum Temperature: Mechanical, °C 940
1000
Melting Completion (Liquidus), °C 1430
1370
Melting Onset (Solidus), °C 1390
1320
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 20
75
Density, g/cm3 7.8
8.3
Embodied Carbon, kg CO2/kg material 3.9
10
Embodied Energy, MJ/kg 56
140
Embodied Water, L/kg 150
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
120
Resilience: Unit (Modulus of Resilience), kJ/m3 140
1610
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 21
40
Strength to Weight: Bending, points 20
30
Thermal Shock Resistance, points 13
34

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.3
Boron (B), % 0
0.0030 to 0.010
Carbon (C), % 0.040 to 0.1
0 to 0.15
Chromium (Cr), % 17 to 19
15 to 20
Cobalt (Co), % 0 to 0.2
13 to 20
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 63.8 to 73.6
0 to 4.0
Manganese (Mn), % 0 to 2.0
0 to 0.75
Molybdenum (Mo), % 0
3.0 to 5.0
Nickel (Ni), % 9.0 to 13
42.7 to 64
Niobium (Nb), % 0.32 to 1.0
0
Phosphorus (P), % 0 to 0.045
0 to 0.015
Silicon (Si), % 0 to 0.75
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.015
Tantalum (Ta), % 0 to 0.1
0
Titanium (Ti), % 0
2.5 to 3.3