C69400 Brass vs. ASTM B631 Class C

C69400 brass belongs to the copper alloys classification, while ASTM B631 class C belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is C69400 brass and the bottom bar is ASTM B631 class C.

UNS C69400 Silicon Red Brass ASTM B631 Class C Silver-Tungsten Electrical Contact Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		110
Elastic (Young's, Tensile) Modulus, GPa		180 to 190

Poisson's Ratio		0.33
Poisson's Ratio		0.32

Shear Modulus, GPa		42
Shear Modulus, GPa		66 to 71

Thermal Properties

Latent Heat of Fusion, J/g		260
Latent Heat of Fusion, J/g		140 to 150

Melting Completion (Liquidus), °C		920
Melting Completion (Liquidus), °C		2090 to 2230

Specific Heat Capacity, J/kg-K		410
Specific Heat Capacity, J/kg-K		180

Thermal Conductivity, W/m-K		26
Thermal Conductivity, W/m-K		450 to 490

Thermal Expansion, µm/m-K		18
Thermal Expansion, µm/m-K		14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		6.2
Electrical Conductivity: Equal Volume, % IACS		55 to 63

Electrical Conductivity: Equal Weight (Specific), % IACS		6.7
Electrical Conductivity: Equal Weight (Specific), % IACS		36 to 43

Otherwise Unclassified Properties

Density, g/cm³		8.3
Density, g/cm³		13 to 14

Embodied Carbon, kg CO₂/kg material		2.7
Embodied Carbon, kg CO₂/kg material		55 to 59

Embodied Energy, MJ/kg		44
Embodied Energy, MJ/kg		860 to 920

Common Calculations

Stiffness to Weight: Axial, points		7.4
Stiffness to Weight: Axial, points		7.4 to 7.6

Stiffness to Weight: Bending, points		19
Stiffness to Weight: Bending, points		14

Thermal Diffusivity, mm²/s		7.7
Thermal Diffusivity, mm²/s		180 to 200