Brazing Newsletter      www.titanium-brazing.com
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 NEW LOW-TEMPERATURE FILLER METALS FOR BRAZING TITANIUM

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1.  TiBraze® 200 FOIL IS NOW AVAILABLE

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TiBraze200, a low-erosion filler metal that is used in brazing titanium alloys, titanium aluminides, refractory metals, ceramics, graphite, and carbon-carbon components, is now offered in a roll form amorphous foil :

thickness 50 } 5 microns ( ~ 0.002 inches)
width 3 inches ( ~ 75 mm) or 2 inches ( ~ 50 mm)
minimum order 1 m ( ~ 3 feet )

composition of TiBraze200 foil is covered in Table 6 AWS A5.8/A5.8:2011 as BTi-5 :

Zr 19-21 wt.%

Ni 19-21 wt.%

Cu 19-21 wt.%

Ti remainder


Oxygen < 800 ppm

Nitrogen < 50 ppm


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liquidus temperature = 863C (1585F)

solidus temperature = 845C (1583F)

brazing temperature for joining titanium

= 880-900C (1616-1652F).

brazing temperature for joining ceramics, graphite, or carbon composites = > 920C (1688F).


brazing : in vacuum 10-4 Torr or better


density
= ~ 6.68 g/cm3 (~ 0.24 lb/in3)
coefficient of thermal expansion

= 8.8 x 10-6 m/[m·C-1] ( 4.9 x 10-6 in/[in·F-1] )


foil brazed joint work is reliable :
o up to 500C (932F) long term
o up to 600C (1112F) short term

brazed joint room temperature tensile strength :

o ( Titanium Grade 2 , 340-380 MPa (49-55 ksi) )
o ( Ti-6Al-4V , 780-820 MPa (113-119 ksi) )


Typical applications are : fuel cells, heat exchangers, medical instruments or implants, honeycomb panels, electronic devices, compressor rotors, divertor cooling systems.


1 lb of foil covers 1.23 m2 = 11.1 sq. feet.

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2. TiBraze® 1450 FOIL:

Heat-Resistant Brazing

Filler Metal is AVAILABLE

TiBraze1450, which is used for brazing molybdenum, niobium, tantalum, ceramics, graphite, and carbon-to-carbon composites, is offered in form of a foil :

thickness 77 } 5 microns ( ~ 0.003 inch)
width 6 inches ( ~ 150 mm)

composition :

Ni 73-74 wt.%

Cr 16-17 wt.%

Fe 8-9 wt.%

Ti 0.3-0.5 wt.%


liquidus temperature = 1420C (2588F)

solidus temperature = 1355C (2470F)

brazing temperature = 1430-1450C (2606-2642F)

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density = 8.5 g/cm3 (0.307 lb/in3)

coefficient of thermal expansion

= 13.48 x 10-6 m/[m·C-1] (7.4 x 10-6 in/[in·F-1])


foil brazed joint work is reliable :
o at 600-1000C (1112-1832F)

brazed joint shear strength :
o ( usual room T Molybdenum , > 600 MPa (87 ksi) )
o ( 980C (1800F) Molybdenum , > 600 MPa (87 ksi) )

Typical applications are : medical instruments or parts, oil refining systems, electronics, cooling systems of nuclear reactors, molybdenum pipes brazed to graphite blocks of nuclear reactor divertors, aerospace materials.


This foil is supplied in a roll form pieces 150 mm x 150 mm or in any weight divisible by 1 lb without a remainder.

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  September 23, 2013

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TiBraze
® 200 Foil

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TiBraze® 1450 FOIL

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Leo Shapiro,

lshapiro@titanium-brazing.com

Titanium Brazing, Inc.
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For more information or technical assistance,  

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

or phone us at 614-886-7519

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©Titanium Brazing, Inc.

info@titanium-brazing.com