Menu (ESC)

AWS BAg-23 (P07850) Filler Metal

AWS BAg-23 is a silver-based filler metal for brazing. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. BAg-23 is the AWS designation for this material. P07850 is the UNS number.

It has a very high melting temperature among silver-based braze fillers. In addition, it has a moderately high density and a fairly low heat capacity.

The graph bars on the material properties cards below compare AWS BAg-23 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

750 to 1040 °C 1380 to 1900 °F

Latent Heat of Fusion

130 J/g

Melting Completion (Liquidus)

970 °C 1780 °F

Melting Onset (Solidus)

960 °C 1760 °F

Specific Heat Capacity

270 J/kg-K 0.065 BTU/lb-°F

Thermal Expansion

20 µm/m-K

Other Material Properties


10 g/cm3 620 lb/ft3

Elastic (Young's, Tensile) Modulus

90 GPa 13 x 106 psi

Poisson's Ratio


Shear Modulus

33 GPa 4.8 x 106 psi

Tensile Strength: Ultimate (UTS)

170 MPa 25 x 103 psi

Common Calculations

Stiffness to Weight: Axial

5.0 points

Stiffness to Weight: Bending

15 points

Strength to Weight: Axial

4.7 points

Strength to Weight: Bending

6.8 points

Thermal Shock Resistance

6.8 points

Alloy Composition

Silver (Ag)Ag 84 to 86
Manganese (Mn)Mn 13.9 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

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015