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AWS BAg-6 (P07503) Filler Metal

AWS BAg-6 is a silver-based filler metal for brazing. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. BAg-6 is the AWS designation for this material. P07503 is the UNS number.

The graph bars on the material properties cards below compare AWS BAg-6 to: silver-based braze fillers (top), all alloys in the same category (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elastic (Young's, Tensile) Modulus

89 GPa 13 x 106 psi

Poisson's Ratio


Shear Modulus

33 GPa 4.8 x 106 psi

Tensile Strength: Ultimate (UTS)

160 MPa 23 x 103 psi

Thermal Properties

Brazing Temperature

650 to 870 °C 1210 to 1600 °F

Latent Heat of Fusion

140 J/g

Melting Completion (Liquidus)

770 °C 1430 °F

Melting Onset (Solidus)

690 °C 1270 °F

Specific Heat Capacity

310 J/kg-K 0.074 BTU/lb-°F

Thermal Expansion

20 µm/m-K

Otherwise Unclassified Properties


9.3 g/cm3 580 lb/ft3

Embodied Carbon

49 kg CO2/kg material

Embodied Energy

770 MJ/kg 330 x 103 BTU/lb

Common Calculations

Stiffness to Weight: Axial

5.3 points

Stiffness to Weight: Bending

16 points

Strength to Weight: Axial

4.8 points

Strength to Weight: Bending

7.0 points

Thermal Shock Resistance

6.5 points

Alloy Composition

Silver (Ag)Ag 49 to 51
Copper (Cu)Cu 33 to 35
Zinc (Zn)Zn 14 to 18
Residualsres. 0 to 0.15

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

AWS A5.8: Specification for Filler Metals for Brazing and Braze Welding