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AISI 431 Stainless Steel vs. C71500 Copper-nickel

AISI 431 stainless steel belongs to the iron alloys classification, while C71500 copper-nickel belongs to the copper alloys. There are 24 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is AISI 431 stainless steel and the bottom bar is C71500 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
140
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
52
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
380 to 620

Thermal Properties

Latent Heat of Fusion, J/g 280
230
Maximum Temperature: Mechanical, °C 850
260
Melting Completion (Liquidus), °C 1510
1240
Melting Onset (Solidus), °C 1450
1170
Specific Heat Capacity, J/kg-K 480
400
Thermal Conductivity, W/m-K 26
28
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
4.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
4.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
41
Density, g/cm3 7.7
8.9
Embodied Carbon, kg CO2/kg material 2.2
5.1
Embodied Energy, MJ/kg 31
74
Embodied Water, L/kg 120
280

Common Calculations

Stiffness to Weight: Axial, points 14
8.6
Stiffness to Weight: Bending, points 25
19
Strength to Weight: Axial, points 32 to 50
12 to 19
Strength to Weight: Bending, points 27 to 36
13 to 18
Thermal Diffusivity, mm2/s 7.0
7.7
Thermal Shock Resistance, points 28 to 43
12 to 20

Alloy Composition

Carbon (C), % 0 to 0.2
0
Chromium (Cr), % 15 to 17
0
Copper (Cu), % 0
63.5 to 70.6
Iron (Fe), % 78.2 to 83.8
0.4 to 1.0
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0 to 1.0
0 to 1.0
Nickel (Ni), % 1.3 to 2.5
29 to 33
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.5