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AWS BAg-5 (P07453) Filler Metal

AWS BAg-5 is a silver-based filler metal for brazing. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. BAg-5 is the AWS designation for this material. P07453 is the UNS number.

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

The graph bars on the material properties cards below compare AWS BAg-5 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

88 GPa 13 x 106 psi

Poisson's Ratio


Shear Modulus

33 GPa 4.8 x 106 psi

Tensile Strength: Ultimate (UTS)

150 MPa 22 x 103 psi

Thermal Properties

Brazing Temperature

740 to 870 °C 1370 to 1600 °F

Latent Heat of Fusion

140 J/g

Melting Completion (Liquidus)

740 °C 1370 °F

Melting Onset (Solidus)

660 °C 1230 °F

Specific Heat Capacity

320 J/kg-K 0.076 BTU/lb-°F

Thermal Expansion

21 µm/m-K

Otherwise Unclassified Properties


9.0 g/cm3 560 lb/ft3

Embodied Carbon

44 kg CO2/kg material

Embodied Energy

700 MJ/kg 300 x 103 BTU/lb

Common Calculations

Stiffness to Weight: Axial

5.4 points

Stiffness to Weight: Bending

16 points

Strength to Weight: Axial

4.6 points

Strength to Weight: Bending

6.9 points

Thermal Shock Resistance

5.9 points

Alloy Composition

Silver (Ag)Ag 44 to 46
Copper (Cu)Cu 29 to 31
Zinc (Zn)Zn 23 to 27
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