C37700 Brass vs. R05240 Alloy

C37700 brass belongs to the copper alloys classification, while R05240 alloy belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is C37700 brass and the bottom bar is R05240 alloy.

UNS C37700 (CW612N) Forging Brass UNS R05240 Tantalum-Niobium Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		100
Elastic (Young's, Tensile) Modulus, GPa		150

Elongation at Break, %		40
Elongation at Break, %		25

Poisson's Ratio		0.31
Poisson's Ratio		0.36

Shear Modulus, GPa		39
Shear Modulus, GPa		57

Tensile Strength: Ultimate (UTS), MPa		400
Tensile Strength: Ultimate (UTS), MPa		270

Tensile Strength: Yield (Proof), MPa		160
Tensile Strength: Yield (Proof), MPa		170

Thermal Properties

Latent Heat of Fusion, J/g		170
Latent Heat of Fusion, J/g		210

Specific Heat Capacity, J/kg-K		380
Specific Heat Capacity, J/kg-K		190

Thermal Expansion, µm/m-K		21
Thermal Expansion, µm/m-K		6.8

Otherwise Unclassified Properties

Density, g/cm³		8.1
Density, g/cm³		14

Embodied Water, L/kg		320
Embodied Water, L/kg		460

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		130
Resilience: Ultimate (Unit Rupture Work), MJ/m³		59

Resilience: Unit (Modulus of Resilience), kJ/m³		120
Resilience: Unit (Modulus of Resilience), kJ/m³		90

Stiffness to Weight: Axial, points		7.1
Stiffness to Weight: Axial, points		6.3

Stiffness to Weight: Bending, points		19
Stiffness to Weight: Bending, points		13

Strength to Weight: Axial, points		14
Strength to Weight: Axial, points		5.4

Strength to Weight: Bending, points		15
Strength to Weight: Bending, points		6.8

Thermal Shock Resistance, points		13
Thermal Shock Resistance, points		18

Alloy Composition

Carbon (C), %		0
Carbon (C), %		0 to 0.010

Copper (Cu), %		58 to 61
Copper (Cu), %		0

Hydrogen (H), %		0
Hydrogen (H), %		0 to 0.0015

Iron (Fe), %		0 to 0.3
Iron (Fe), %		0 to 0.010

Lead (Pb), %		1.5 to 2.5
Lead (Pb), %		0

Molybdenum (Mo), %		0
Molybdenum (Mo), %		0 to 0.020

Nickel (Ni), %		0
Nickel (Ni), %		0 to 0.010

Niobium (Nb), %		0
Niobium (Nb), %		35 to 42

Nitrogen (N), %		0
Nitrogen (N), %		0 to 0.010

Oxygen (O), %		0
Oxygen (O), %		0 to 0.020

Silicon (Si), %		0
Silicon (Si), %		0 to 0.0050

Tantalum (Ta), %		0
Tantalum (Ta), %		57.9 to 65

Titanium (Ti), %		0
Titanium (Ti), %		0 to 0.010

Tungsten (W), %		0
Tungsten (W), %		0 to 0.050

Zinc (Zn), %		35.7 to 40.5
Zinc (Zn), %		0

Residuals, %		0 to 0.5
Residuals, %		0