Brazing Newsletter      www.titanium-brazing.com
 

 NEW LOW-TEMPERATURE FILLER METALS FOR BRAZING TITANIUM

 

 1. TiBraze® Al-665 FOIL IS NOW AVAILABLE

 

SUMMARY. TiBrazeAl-665, which is a low-temperature filler metal for brazing titanium, titanium matrix composites, and titanium to copper, is offered in the form of foil 50 ± 5 microns (0.002 inch) thick.

FEATURES. Composition of TiBrazeAl-665 foil is:

 

Al 96.80-97.65 wt.%

Cr 0.15-0.35 wt.%

Mg 2.2-2.8 wt.%

 

Liquidus temperature is 645°C (1193°F).

Solidus temperature is 607°C (1125°F).

 

Brazing temperature is 665-680°C (1229-1256°F)

 

Density is 2.68 g/cm3 (0.0968 lb/in3)

 

Coefficient of thermal expansion is

 

23.8 x 10-6 m/[m·°C-1] (13.2 in/[in·°F])

 

Brazing:

-        in vacuum 10-4 Torr or better

-        induction or torch brazing in air with the flux RL3 A16

 

Shear strength of titanium Grade 2 brazed joints is up to 97 MPa (14 ksi) at room temperature.

 

Shear strength of titanium Grade 5 (Ti-6Al-4V) brazed joints is up to 110 MPa (16 ksi) at room temperature.

 

Shear strength of titanium-to-copper brazed joints is up to 77 MPa (11.2 ksi) at room temperature.

 

Typical applications are: heat exchangers, medical instruments, cooling system, electronic housings, lining and electrodes of galvanic baths, and others.

 

The width of TiBrazeAl-665 foil is 6 inches (~150 mm).

 

The foil is supplied in the form of 1-5 lbs rolls.

 

1 lb of the foil covers about 33806 cm2 (5239 in2 ).

 

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 2. TiBraze® Al-655 WIRE IS NOW AVAILABLE

SUMMARY. TiBrazeAl-655, which is a low-temperature filler metal for brazing titanium, titanium matrix composites, and titanium to copper, is offered in the form of wire 1/16 inch (1.6 mm) in diameter.

FEATURES. Composition of TiBrazeAl-655 wire is:

 

Al 92.6-93.9 wt.%

Cu 5.8-6.8 wt.%

Mn 0.2-0.4 wt.%

Ti 0.1-0.2 wt.%

(V + Zr) 0.2-0.3 wt.%

 

Liquidus temperature is 643°C (1190°F).

Solidus temperature is 502°C (1010°F).

 

Brazing temperature is 655-675°C (1211-1247°F)

 

Density is 2.85 g/cm3 (0.103 lb/in3)

 

Coefficient of thermal expansion is

 

23.2 x 10-6 m/[m·°C-1] (12.9 in/[in·°F])

 

Brazing:

-        in vacuum 10-4 Torr or better

-        induction or torch brazing in air with the flux RL3 A16

 

Shear strength of titanium Grade 2 brazed joints is up to 131 MPa (19 ksi) at room temperature.

 

Shear strength of titanium Grade 5 (Ti-6Al-4V) brazed joints is up to 143 MPa (20.7 ksi) at room temperature.

 

Typical applications are: titanium tubes, titanium to copper tubes, medical instruments, cooling system, electronic housings, lining and electrodes of galvanic baths, and others.

 

The wire is supplied in the form of 36" (91 cm) pieces.

 

1 lb of the TiBrazeAl-655 wire comprises of 94 pieces, 36" each piece.   

 

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November 9, 2012

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Figure 1. TiBraze® Al-665 Foil

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 2. TiBraze® Al-655 Wire

 

 

 

 

 

 

 

Leo Shapiro,

lshapiro@titanium-brazing.com

Titanium Brazing, Inc.
 

For more information or technical assistance,  

visit our website, www.titanium-brazing.com,  

or phone us at 614-886-7519

 

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