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AISI 431 Stainless Steel vs. C72150 Copper-nickel

AISI 431 stainless steel belongs to the iron alloys classification, while C72150 copper-nickel belongs to the copper alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AISI 431 stainless steel and the bottom bar is C72150 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
99
Elastic (Young's, Tensile) Modulus, GPa 200
150
Elongation at Break, % 15 to 17
29
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
55
Shear Strength, MPa 550 to 840
320
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
490
Tensile Strength: Yield (Proof), MPa 710 to 1040
210

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 850
600
Melting Completion (Liquidus), °C 1510
1210
Melting Onset (Solidus), °C 1450
1250
Specific Heat Capacity, J/kg-K 480
410
Thermal Conductivity, W/m-K 26
22
Thermal Expansion, µm/m-K 12
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
3.5
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
3.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
45
Density, g/cm3 7.7
8.9
Embodied Carbon, kg CO2/kg material 2.2
6.1
Embodied Energy, MJ/kg 31
88
Embodied Water, L/kg 120
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
120
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
150
Stiffness to Weight: Axial, points 14
9.1
Stiffness to Weight: Bending, points 25
20
Strength to Weight: Axial, points 32 to 50
15
Strength to Weight: Bending, points 27 to 36
15
Thermal Diffusivity, mm2/s 7.0
6.0
Thermal Shock Resistance, points 28 to 43
18

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.1
Chromium (Cr), % 15 to 17
0
Copper (Cu), % 0
52.5 to 57
Iron (Fe), % 78.2 to 83.8
0 to 0.1
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0 to 1.0
0 to 0.050
Nickel (Ni), % 1.3 to 2.5
43 to 46
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.5