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SAE-AISI 81B45 Steel vs. C74400 Nickel Silver

SAE-AISI 81B45 steel belongs to the iron alloys classification, while C74400 nickel silver belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 81B45 steel and the bottom bar is C74400 nickel silver.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 12 to 24
43
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 73
39
Shear Strength, MPa 340 to 400
240
Tensile Strength: Ultimate (UTS), MPa 540 to 670
350
Tensile Strength: Yield (Proof), MPa 350 to 560
120

Thermal Properties

Latent Heat of Fusion, J/g 250
180
Maximum Temperature: Mechanical, °C 410
140
Melting Completion (Liquidus), °C 1460
930
Melting Onset (Solidus), °C 1420
910
Specific Heat Capacity, J/kg-K 470
390
Thermal Conductivity, W/m-K 40
120
Thermal Expansion, µm/m-K 12
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
26
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
29

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
25
Density, g/cm3 7.8
8.2
Embodied Carbon, kg CO2/kg material 1.5
2.9
Embodied Energy, MJ/kg 20
48
Embodied Water, L/kg 49
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 110
120
Resilience: Unit (Modulus of Resilience), kJ/m3 320 to 840
63
Stiffness to Weight: Axial, points 13
7.4
Stiffness to Weight: Bending, points 24
19
Strength to Weight: Axial, points 19 to 24
12
Strength to Weight: Bending, points 19 to 22
14
Thermal Diffusivity, mm2/s 11
37
Thermal Shock Resistance, points 17 to 21
12

Alloy Composition

Boron (B), % 0.00050 to 0.0030
0
Carbon (C), % 0.43 to 0.48
0
Chromium (Cr), % 0.35 to 0.55
0
Copper (Cu), % 0
62 to 66
Iron (Fe), % 97 to 98
0 to 0.050
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0.75 to 1.0
0
Molybdenum (Mo), % 0.080 to 0.15
0
Nickel (Ni), % 0.2 to 0.4
2.0 to 4.0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.040
0
Zinc (Zn), % 0
29.6 to 36
Residuals, % 0
0 to 0.3