Bundy tube, sometimes called
Bundy pipe, is type of double-walled low-carbon
steelSteel is an alloy consisting mostly of iron, with a carbon content between 0.2% and 2.1% by weight, depending on the grade. Carbon is the most cost-effective alloying material for iron, but various other alloying elements are used such as manganese, chromium, vanadium, and tungsten...
tube manufactured by rolling a copper-coated steel strip through 720 degrees and resistance
brazingBrazing is a metal-joining process whereby a filler metal or alloy is heated to melting temperature above and distributed between two or more close-fitting parts by capillary action. The filler metal is brought slightly above its melting temperature while protected by a suitable atmosphere or flux...
the overlapped seam in a process called
Bundywelding. It may be zinc- or terne- coated for corrosion protection. It is used in automotive hydraulic brake lines in cars manufactured in the USA since the 1930s.
A 1969 study by the SAE recommended the replacement of Bundy tube with 90-10 copper-nickel alloy
UNSThe unified numbering system is an alloy designation system widely accepted in North America. It consists of a prefix letter and five digits designating a material composition. A prefix of S indicates stainless steel alloys, C for copper, brass, or bronze alloys, T for tool steels, etc...
C70600 (Kunifer pipe) because of corrosion concerns.
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Bundy tube, sometimes called
Bundy pipe, is type of double-walled low-carbon
steelSteel is an alloy consisting mostly of iron, with a carbon content between 0.2% and 2.1% by weight, depending on the grade. Carbon is the most cost-effective alloying material for iron, but various other alloying elements are used such as manganese, chromium, vanadium, and tungsten...
tube manufactured by rolling a copper-coated steel strip through 720 degrees and resistance
brazingBrazing is a metal-joining process whereby a filler metal or alloy is heated to melting temperature above and distributed between two or more close-fitting parts by capillary action. The filler metal is brought slightly above its melting temperature while protected by a suitable atmosphere or flux...
the overlapped seam in a process called
Bundywelding. It may be zinc- or terne- coated for corrosion protection. It is used in automotive hydraulic brake lines in cars manufactured in the USA since the 1930s.
A 1969 study by the SAE recommended the replacement of Bundy tube with 90-10 copper-nickel alloy
UNSThe unified numbering system is an alloy designation system widely accepted in North America. It consists of a prefix letter and five digits designating a material composition. A prefix of S indicates stainless steel alloys, C for copper, brass, or bronze alloys, T for tool steels, etc...
C70600 (Kunifer pipe) because of corrosion concerns. Kunifer pipe has since been adopted by European automakers
VolvoThe Volvo Group is a Swedish supplier of commercial vehicles such as trucks, buses and construction equipment, drive systems for marine and industrial applications, aerospace components and financial services...
,
Rolls-RoyceA Rolls-Royce car may refer to vehicles produced by:*Rolls-Royce Limited *Rolls-Royce Motors , which was owned by Vickers between 1980 and 1998, and after that by Volkswagen...
,
Lotus CarsLotus Cars is a British manufacturer of sports and racing cars based at Hethel, Norfolk, England. The company designs and builds race and production automobiles of light weight and high handling characteristics....
, Aston-Martin,
PorschePorsche SE is a German automotive manufacturer of luxury high performance automobiles, which is majority-owned by the Piëch and Porsche families. Dr. Ing. h.c. F. Porsche AG , often shortened to Porsche AG, is responsible and manufacturer of the Porsche automobile line...
, and
AudiAUDI AG, is a German company which produces luxury cars under the Audi brand, . It is part of the Volkswagen Group. The name Audi is based on a Latin translation of the surname of the founder August Horch, itself the German word for “listen!"Audi is headquartered in Ingolstadt, Bavaria, Germany.It...
. Bundy pipe retains the advantage higher rigidity, which means less volume expansion under pressure.
The Bundy Tubing Company, started in the USA, was bought in the 1980s by what is now the British company TI Automotive.
External links
- http://www.tiautomotive.com/
- http://www.tiautomotive.de/home.htm