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AWS BAu-6 (P00700) Filler Metal

AWS BAu-6 is a gold-based filler metal for brazing. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. BAu-6 is the AWS designation for this material. P00700 is the UNS number.

The graph bars on the material properties cards below compare AWS BAu-6 to: gold-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

1050 to 1120 °C 1910 to 2050 °F

Latent Heat of Fusion

120 J/g

Melting Completion (Liquidus)

1050 °C 1910 °F

Melting Onset (Solidus)

1010 °C 1840 °F

Specific Heat Capacity

210 J/kg-K 0.049 BTU/lb-°F

Thermal Expansion

13 µm/m-K

Other Material Properties


16 g/cm3 1030 lb/ft3

Elastic (Young's, Tensile) Modulus

120 GPa 17 x 106 psi

Poisson's Ratio


Shear Modulus

43 GPa 6.2 x 106 psi

Tensile Strength: Ultimate (UTS)

190 MPa 28 x 103 psi

Common Calculations

Stiffness to Weight: Axial

4.0 points

Stiffness to Weight: Bending

10 points

Strength to Weight: Axial

3.2 points

Strength to Weight: Bending

4.5 points

Thermal Shock Resistance

8.5 points

Alloy Composition

Gold (Au)Au 69.5 to 70.5
Nickel (Ni)Ni 21.5 to 22.5
Palladium (Pd)Pd 7.5 to 8.5
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