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SAE-AISI 8740 Steel vs. C87400 Brass

SAE-AISI 8740 steel belongs to the iron alloys classification, while C87400 brass belongs to the copper alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 8740 steel and the bottom bar is C87400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 11 to 23
21
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
41
Tensile Strength: Ultimate (UTS), MPa 580 to 670
390
Tensile Strength: Yield (Proof), MPa 380 to 570
160

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
170
Melting Completion (Liquidus), °C 1460
920
Melting Onset (Solidus), °C 1420
820
Specific Heat Capacity, J/kg-K 470
400
Thermal Conductivity, W/m-K 39
28
Thermal Expansion, µm/m-K 13
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
6.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
7.2

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
27
Density, g/cm3 7.8
8.3
Embodied Carbon, kg CO2/kg material 1.5
2.7
Embodied Energy, MJ/kg 20
44
Embodied Water, L/kg 50
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
65
Resilience: Unit (Modulus of Resilience), kJ/m3 390 to 850
120
Stiffness to Weight: Axial, points 13
7.4
Stiffness to Weight: Bending, points 24
19
Strength to Weight: Axial, points 20 to 24
13
Strength to Weight: Bending, points 20 to 22
14
Thermal Diffusivity, mm2/s 10
8.3
Thermal Shock Resistance, points 17 to 20
14

Alloy Composition

Aluminum (Al), % 0
0 to 0.8
Carbon (C), % 0.38 to 0.43
0
Chromium (Cr), % 0.4 to 0.6
0
Copper (Cu), % 0
79 to 85.5
Iron (Fe), % 96.5 to 97.7
0
Lead (Pb), % 0
0 to 1.0
Manganese (Mn), % 0.75 to 1.0
0
Molybdenum (Mo), % 0.2 to 0.3
0
Nickel (Ni), % 0.4 to 0.7
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
2.5 to 4.0
Sulfur (S), % 0 to 0.040
0
Zinc (Zn), % 0
12 to 16
Residuals, % 0
0 to 0.8