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S17700 Stainless Steel vs. C72800 Copper-nickel

S17700 stainless steel belongs to the iron alloys classification, while C72800 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 S17700 stainless steel and the bottom bar is C72800 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
120
Elongation at Break, % 1.0 to 23
3.9 to 23
Poisson's Ratio 0.28
0.34
Rockwell C Hardness 41 to 46
21 to 40
Shear Modulus, GPa 76
44
Shear Strength, MPa 740 to 940
330 to 740
Tensile Strength: Ultimate (UTS), MPa 1180 to 1650
520 to 1270
Tensile Strength: Yield (Proof), MPa 430 to 1210
250 to 1210

Thermal Properties

Latent Heat of Fusion, J/g 290
210
Maximum Temperature: Mechanical, °C 890
200
Melting Completion (Liquidus), °C 1440
1080
Melting Onset (Solidus), °C 1400
920
Specific Heat Capacity, J/kg-K 480
380
Thermal Conductivity, W/m-K 15
55
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
11
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
11

Otherwise Unclassified Properties

Base Metal Price, % relative 13
38
Density, g/cm3 7.7
8.8
Embodied Carbon, kg CO2/kg material 2.8
4.4
Embodied Energy, MJ/kg 40
68
Embodied Water, L/kg 150
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15 to 210
37 to 99
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 3750
260 to 5650
Stiffness to Weight: Axial, points 14
7.4
Stiffness to Weight: Bending, points 25
19
Strength to Weight: Axial, points 42 to 59
17 to 40
Strength to Weight: Bending, points 32 to 40
16 to 30
Thermal Diffusivity, mm2/s 4.1
17
Thermal Shock Resistance, points 39 to 54
19 to 45

Alloy Composition

Aluminum (Al), % 0.75 to 1.5
0 to 0.1
Antimony (Sb), % 0
0 to 0.020
Bismuth (Bi), % 0
0 to 0.0010
Boron (B), % 0
0 to 0.0010
Carbon (C), % 0 to 0.090
0
Chromium (Cr), % 16 to 18
0
Copper (Cu), % 0
78.3 to 82.8
Iron (Fe), % 70.5 to 76.8
0 to 0.5
Lead (Pb), % 0
0 to 0.0050
Magnesium (Mg), % 0
0.0050 to 0.15
Manganese (Mn), % 0 to 1.0
0.050 to 0.3
Nickel (Ni), % 6.5 to 7.8
9.5 to 10.5
Niobium (Nb), % 0
0.1 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.0050
Silicon (Si), % 0 to 1.0
0 to 0.050
Sulfur (S), % 0 to 0.030
0 to 0.0025
Tin (Sn), % 0
7.5 to 8.5
Titanium (Ti), % 0
0 to 0.010
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.3