Turbo Braze manufactures several different gold-based brazing and soldering alloys for specialty applications. Gold-based alloys offer excellent corrosion resistance, wetability, strength and many are suitable for applications that have high service temperature requirements.
| Name | Specifications Met | Nominal Composition | Solidus | Liquidus | ||||||
| AWS A5.8 | AMS | Au | Cu | Other | oF | oC | oF | oC | ||
| AU1860 | BAu-1 | 37.5 | 62.5 | 1815 | 991 | 1860 | 1016 | INFO |
| Suitable for brazing iron, nickel and cobalt base metals in applications requiring greater corrosion resistance. Also wets metallized ceramics. This filler metal is suitable for step brazing when used with BAu-2 and BAu-3 where multiple joints are required. Less ductile than BAu-3. | Color: | Red/Gold |
| Specific Gravity: | 11.2 | |
| Density: | 5.90 | |
| Electrical Conductivity: | 20.3% IACS | |
| Electrical Resistivity: | 8.50mcΩ |
| AU1635 | BAu-2 | 80 | 20 | 1635 | 891 | 1635 | 891 | INFO |
| This filler metal is the lowest melting of the gold-copper alloys and is suitable for final brazing in step brazing applications. Used to braze ferrous and nonferrous base metals and for making joints in ceramic to metal assemblies. | Color: | Pale Yellow |
| Specific Gravity: | - | |
| Density: | 17.25 | |
| Electrical Conductivity: | -% IACS | |
| Electrical Resistivity: | 14.2mcΩ |
| AU1885 | BAu-3 | 35 | 62 | 3 Ni | 1785 | 974 | 1885 | 1029 | INFO |
| This filler metal is commonly used on nickel, molybdenum and iron based heat resistant alloys; nickel-cobalt-iron alloys and metallized ceramics. It is suitable for use on intitial brazing in step brazing operations with BAu-1 and BAu-2. This filler metal is more sluggish than gold-copper alloys which makes it suitable for larger joint clearances and limits penetration of the base metals. | Color: | Silver/Red |
| Specific Gravity: | 11 | |
| Density: | 5.8 | |
| Electrical Conductivity: | 13.5% IACS | |
| Electrical Resistivity: | 12.8mcΩ |
| AU1740 | BAu-4 | 4787 | 82 | 18 Ni | 1740 | 949 | 1740 | 949 | INFO |
| This filler metal is used to braze a wide range of high-temperature iron and nickel-base alloys. It exhibits minimal intergranular penetration and alloying with substrates. This filler metal is a eutectic composition and is very fluid when molten. Suitable for brazing with torch, induction, resistance or furnace heating. Generally used in vacuum, inert or reducing atmospheres, may also be used with high-temperature flux such as our B201 flux system. | Color: | Silver-Gray |
| Specific Gravity: | 15.82 | |
| Density: | 8.33 | |
| Electrical Conductivity: | 5.85% IACS | |
| Electrical Resistivity: | 29.3mcΩ |
| AU1915 | BAu-6 | 4786 | 70 | 8 Pd, 22 Ni | 1845 | 1007 | 1915 | 1046 | INFO |
| This filler metal is commonly used on ferrous and nonferrous alloys and superalloys for applications requiring elevated temperature service conditions. It is more sluggish than gold-copper alloys which makes it suitable for larger joint clearances and limits penetration of the base metals. This filler metal offers better oxidation resistance and corrosion resistance than gold-copper alloys. | Color: | Dull Gold |
| Specific Gravity: | 14.5 | |
| Density: | 7.66 | |
| Electrical Conductivity: | 8.50% IACS | |
| Electrical Resistivity: | 20.3mcΩ |
| AU1850 | - | - | 35 | 65 | 1814 | 990 | 1850 | 1010 | INFO |
| - | Color: | - |
| Specific Gravity: | - | |
| Density: | - | |
| Electrical Conductivity: | -% IACS | |
| Electrical Resistivity: | -mcΩ |
| AU536 | - | - | 80 | 20 Sn | 536 | 280 | 536 | 280 | INFO |
| This solder alloy has excellent wetting characteristics, resistance to corrosion, joint strength and thermal conductivity which makes it an ideal choice for applications requiring these attributes with a low melting temperature. | Color: | Gray |
| Specific Gravity: | - | |
| Density: | 14.51 g/cm3 | |
| Tensile Strength: | 40,000psi | |
| Shear Strength: | 40,000psi |
| AU673 | - | - | 88 | 12 Ge | 673 | 356 | 673 | 356 | INFO |
| A speciality filler metal that can be used for step soldering assemblies in conjunction with AU536. Often used in hermetic packaging. | Color: | Silver |
| Specific Gravity: | - | |
| Density: | 14.67 g/cm3 | |
| Tensile Strength: | 26,835 psi | |
| Shear Strength: | 26,825 psi |
| AU909 | - | - | 82 | 18 In | 844 | - | 905 | - | INFO |
| - | Color: | - |
| Specific Gravity: | - | |
| Density: | 14.90 g/cm3 | |
| Electrical Conductivity: | -% IACS | |
| Electrical Resistivity: | -mcΩ |
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