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H08 C42200 Brass vs. H08 C68800 Brass

Both H08 C42200 brass and H08 C68800 brass are copper alloys. Both are furnished in the H08 (spring) temper. They have 84% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is H08 C42200 brass and the bottom bar is H08 C68800 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 2.0
2.0
Poisson's Ratio 0.33
0.32
Rockwell B Hardness 87
98
Rockwell Superficial 30T Hardness 73
83
Shear Modulus, GPa 42
41
Shear Strength, MPa 340
480
Tensile Strength: Ultimate (UTS), MPa 600
840
Tensile Strength: Yield (Proof), MPa 550
760

Thermal Properties

Latent Heat of Fusion, J/g 200
190
Maximum Temperature: Mechanical, °C 170
160
Melting Completion (Liquidus), °C 1040
960
Melting Onset (Solidus), °C 1020
950
Specific Heat Capacity, J/kg-K 380
400
Thermal Conductivity, W/m-K 130
40
Thermal Expansion, µm/m-K 18
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
18
Electrical Conductivity: Equal Weight (Specific), % IACS 32
20

Otherwise Unclassified Properties

Base Metal Price, % relative 29
26
Density, g/cm3 8.6
8.2
Embodied Carbon, kg CO2/kg material 2.7
2.8
Embodied Energy, MJ/kg 44
48
Embodied Water, L/kg 320
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
16
Resilience: Unit (Modulus of Resilience), kJ/m3 1370
2670
Stiffness to Weight: Axial, points 7.2
7.3
Stiffness to Weight: Bending, points 19
19
Strength to Weight: Axial, points 19
29
Strength to Weight: Bending, points 18
24
Thermal Diffusivity, mm2/s 39
12
Thermal Shock Resistance, points 21
29

Alloy Composition


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Aluminum (Al), % 0
3.0 to 3.8
Cobalt (Co), % 0
0.25 to 0.55
Copper (Cu), % 86 to 89
70.8 to 75.5
Iron (Fe), % 0 to 0.050
0 to 0.2
Lead (Pb), % 0 to 0.050
0 to 0.050
Phosphorus (P), % 0 to 0.35
0
Tin (Sn), % 0.8 to 1.4
0
Zinc (Zn), % 8.7 to 13.2
21.3 to 24.1
Residuals, % 0 to 0.5
0 to 0.5