Menu (ESC)

AWS BAg-1 (P07450) Filler Metal

AWS BAg-1 is a silver-based filler metal for brazing. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. BAg-1 is the AWS designation for this material. P07450 is the UNS number.

It has a fairly low melting temperature among the silver-based braze fillers in the database.

The graph bars on the material properties cards below compare AWS BAg-1 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

75 GPa 11 x 106 psi

Poisson's Ratio


Shear Modulus

28 GPa 4.1 x 106 psi

Tensile Strength: Ultimate (UTS)

170 MPa 25 x 103 psi

Thermal Properties

Brazing Temperature

620 to 760 °C 1140 to 1400 °F

Latent Heat of Fusion

110 J/g

Melting Completion (Liquidus)

620 °C 1140 °F

Melting Onset (Solidus)

610 °C 1120 °F

Specific Heat Capacity

280 J/kg-K 0.067 BTU/lb-°F

Thermal Expansion

23 µm/m-K

Otherwise Unclassified Properties


9.2 g/cm3 570 lb/ft3

Embodied Carbon

44 kg CO2/kg material

Embodied Energy

690 MJ/kg 300 x 103 BTU/lb

Common Calculations

Stiffness to Weight: Axial

4.6 points

Stiffness to Weight: Bending

15 points

Strength to Weight: Axial

5.1 points

Strength to Weight: Bending

7.4 points

Thermal Shock Resistance

7.0 points

Alloy Composition

Silver (Ag)Ag 44 to 46
Cadmium (Cd)Cd 23 to 25
Zinc (Zn)Zn 14 to 18
Copper (Cu)Cu 14 to 16
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