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AWS BAg-10 (P07700) Filler Metal

AWS BAg-10 is a silver-based filler metal for brazing. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. BAg-10 is the AWS designation for this material. P07700 is the UNS number.

It has a fairly low tensile strength and a moderately high density among silver-based braze fillers.

The graph bars on the material properties cards below compare AWS BAg-10 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.

Thermal Properties

Brazing Temperature

740 to 970 °C 1360 to 1770 °F

Latent Heat of Fusion

130 J/g

Melting Completion (Liquidus)

740 °C 1360 °F

Melting Onset (Solidus)

690 °C 1280 °F

Specific Heat Capacity

280 J/kg-K 0.067 BTU/lb-°F

Thermal Expansion

20 µm/m-K

Other Material Properties


9.8 g/cm3 610 lb/ft3

Elastic (Young's, Tensile) Modulus

82 GPa 12 x 106 psi

Poisson's Ratio


Shear Modulus

30 GPa 4.4 x 106 psi

Tensile Strength: Ultimate (UTS)

140 MPa 20 x 103 psi

Common Calculations

Stiffness to Weight: Axial

4.6 points

Stiffness to Weight: Bending

15 points

Strength to Weight: Axial

4.0 points

Strength to Weight: Bending

6.1 points

Thermal Shock Resistance

6.2 points

Alloy Composition

Silver (Ag)Ag 69 to 71
Copper (Cu)Cu 19 to 21
Zinc (Zn)Zn 8.0 to 12
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