AWS BAg-21 vs. C87800 Brass

AWS BAg-21 belongs to the otherwise unclassified metals classification, while C87800 brass belongs to the copper alloys. They have a modest 29% of their average alloy composition in common, which, by itself, doesn't mean much. 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 AWS BAg-21 and the bottom bar is C87800 brass.

AWS BAg-21 (P07630) Filler Metal UNS C87800 Silicon Brass

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		85
Elastic (Young's, Tensile) Modulus, GPa		110

Poisson's Ratio		0.36
Poisson's Ratio		0.33

Shear Modulus, GPa		31
Shear Modulus, GPa		42

Tensile Strength: Ultimate (UTS), MPa		150
Tensile Strength: Ultimate (UTS), MPa		590

Thermal Properties

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

Melting Completion (Liquidus), °C		800
Melting Completion (Liquidus), °C		920

Melting Onset (Solidus), °C		690
Melting Onset (Solidus), °C		820

Specific Heat Capacity, J/kg-K		280
Specific Heat Capacity, J/kg-K		410

Thermal Expansion, µm/m-K		19
Thermal Expansion, µm/m-K		18

Otherwise Unclassified Properties

Density, g/cm³		9.8
Density, g/cm³		8.3

Embodied Energy, MJ/kg		970
Embodied Energy, MJ/kg		44

Common Calculations

Stiffness to Weight: Axial, points		4.8
Stiffness to Weight: Axial, points		7.4

Stiffness to Weight: Bending, points		15
Stiffness to Weight: Bending, points		19

Strength to Weight: Axial, points		4.2
Strength to Weight: Axial, points		20

Strength to Weight: Bending, points		6.4
Strength to Weight: Bending, points		19

Thermal Shock Resistance, points		6.6
Thermal Shock Resistance, points		21

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.15

Antimony (Sb), %		0
Antimony (Sb), %		0 to 0.050

Arsenic (As), %		0
Arsenic (As), %		0 to 0.050

Copper (Cu), %		27.5 to 29.5
Copper (Cu), %		80 to 84.2

Iron (Fe), %		0
Iron (Fe), %		0 to 0.15

Lead (Pb), %		0
Lead (Pb), %		0 to 0.15

Magnesium (Mg), %		0
Magnesium (Mg), %		0 to 0.010

Manganese (Mn), %		0
Manganese (Mn), %		0 to 0.15

Nickel (Ni), %		2.0 to 3.0
Nickel (Ni), %		0 to 0.2

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.010

Silicon (Si), %		0
Silicon (Si), %		3.8 to 4.2

Silver (Ag), %		62 to 64
Silver (Ag), %		0

Sulfur (S), %		0
Sulfur (S), %		0 to 0.050

Tin (Sn), %		5.0 to 7.0
Tin (Sn), %		0 to 0.25

Zinc (Zn), %		0
Zinc (Zn), %		12 to 16

Residuals, %		0
Residuals, %		0 to 0.5