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ASTM B685 Alloy vs. C33200 Brass

ASTM B685 alloy belongs to the otherwise unclassified metals classification, while C33200 brass belongs to the copper alloys. They have 40% of their average alloy composition in common. There are 17 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is ASTM B685 alloy and the bottom bar is C33200 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
100
Poisson's Ratio 0.37
0.31
Shear Modulus, GPa 43
40
Tensile Strength: Ultimate (UTS), MPa 660 to 1060
320 to 520

Thermal Properties

Latent Heat of Fusion, J/g 180
170
Melting Completion (Liquidus), °C 1230
930
Melting Onset (Solidus), °C 1200
900
Specific Heat Capacity, J/kg-K 300
380
Thermal Expansion, µm/m-K 14
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 5.0
26
Electrical Conductivity: Equal Weight (Specific), % IACS 4.1
28

Otherwise Unclassified Properties

Density, g/cm3 11
8.2

Common Calculations

Stiffness to Weight: Axial, points 6.1
7.1
Stiffness to Weight: Bending, points 15
19
Strength to Weight: Axial, points 17 to 27
11 to 17
Strength to Weight: Bending, points 16 to 21
13 to 17
Thermal Shock Resistance, points 28 to 46
11 to 17

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 39.5 to 40.5
65 to 68
Iron (Fe), % 0 to 0.050
0 to 0.070
Lead (Pb), % 0 to 0.030
1.5 to 2.5
Palladium (Pd), % 59 to 60.5
0
Silver (Ag), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.060
29 to 33.5
Residuals, % 0
0 to 0.4