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Nickel 625 vs. AISI 303 Stainless Steel

Nickel 625 belongs to the nickel alloys classification, while AISI 303 stainless steel belongs to the iron alloys. They have a modest 30% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is nickel 625 and the bottom bar is AISI 303 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 33 to 34
40 to 51
Fatigue Strength, MPa 240 to 320
230 to 360
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 79
77
Shear Strength, MPa 530 to 600
430 to 470
Tensile Strength: Ultimate (UTS), MPa 790 to 910
600 to 690
Tensile Strength: Yield (Proof), MPa 320 to 450
230 to 420

Thermal Properties

Latent Heat of Fusion, J/g 330
290
Maximum Temperature: Mechanical, °C 980
930
Melting Completion (Liquidus), °C 1350
1450
Melting Onset (Solidus), °C 1290
1400
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 11
16
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 80
15
Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 14
3.0
Embodied Energy, MJ/kg 190
42
Embodied Water, L/kg 290
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220 to 250
240
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 490
140 to 440
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 29
21 to 25
Strength to Weight: Bending, points 22 to 24
20 to 22
Thermal Diffusivity, mm2/s 2.9
4.4
Thermal Shock Resistance, points 22 to 25
13 to 15

Alloy Composition

Aluminum (Al), % 0 to 0.4
0
Carbon (C), % 0 to 0.1
0 to 0.15
Chromium (Cr), % 20 to 23
17 to 19
Cobalt (Co), % 0 to 1.0
0
Iron (Fe), % 0 to 5.0
67.3 to 74.9
Manganese (Mn), % 0 to 0.5
0 to 2.0
Molybdenum (Mo), % 8.0 to 10
0
Nickel (Ni), % 58 to 68.9
8.0 to 10
Niobium (Nb), % 3.2 to 4.2
0
Phosphorus (P), % 0 to 0.015
0 to 0.2
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0.15 to 0.35
Titanium (Ti), % 0 to 0.4
0

Comparable Variants