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Nickel 625 vs. S44700 Stainless Steel

Nickel 625 belongs to the nickel alloys classification, while S44700 stainless steel belongs to the iron alloys. They have a modest 28% of their average alloy composition in common, which, by itself, doesn't mean much. There are 26 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is nickel 625 and the bottom bar is S44700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 33 to 34
23
Fatigue Strength, MPa 240 to 320
300
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 79
82
Shear Strength, MPa 530 to 600
380
Tensile Strength: Ultimate (UTS), MPa 790 to 910
600
Tensile Strength: Yield (Proof), MPa 320 to 450
450

Thermal Properties

Latent Heat of Fusion, J/g 330
300
Maximum Temperature: Mechanical, °C 980
1100
Melting Completion (Liquidus), °C 1350
1460
Melting Onset (Solidus), °C 1290
1410
Specific Heat Capacity, J/kg-K 440
480
Thermal Expansion, µm/m-K 13
11

Otherwise Unclassified Properties

Base Metal Price, % relative 80
18
Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 14
3.6
Embodied Energy, MJ/kg 190
49
Embodied Water, L/kg 290
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220 to 250
120
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 490
480
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 29
21
Strength to Weight: Bending, points 22 to 24
20
Thermal Shock Resistance, points 22 to 25
19

Alloy Composition

Aluminum (Al), % 0 to 0.4
0
Carbon (C), % 0 to 0.1
0 to 0.010
Chromium (Cr), % 20 to 23
28 to 30
Cobalt (Co), % 0 to 1.0
0
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 0 to 5.0
64.9 to 68.5
Manganese (Mn), % 0 to 0.5
0 to 0.3
Molybdenum (Mo), % 8.0 to 10
3.5 to 4.2
Nickel (Ni), % 58 to 68.9
0 to 0.15
Niobium (Nb), % 3.2 to 4.2
0
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.015
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.2
Sulfur (S), % 0 to 0.015
0 to 0.020
Titanium (Ti), % 0 to 0.4
0