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oldcorollas
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
 
Re: modifiying original exhuast manifold Sat, 27 December 2003 06:57 Go to previous messageGo to previous message
the problem with welding and braxing a cast iron manifold, is that there is a large change in composition across the join, which can lead to a weaker structure.

basically, cast iron has a lot of carbon in it, maybe around 4-5%, whereas mild steels are around 0.2%. between these two compositions there are some brittle structures (basically the hypereutectic compostions with respect to pearlite). it IS possible to successfully weld to cast iron, but it helps to have a filler metal with high carbon content, and to have the correct heating, cooling, and possibly heat treatment steps.

i would suggest that you should always support heavy items with stays.... since you have a few kgs haning off a couple of bolts at a reasonable distance from the motor....

Cya, Stewart

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SubjectPosterDate
Read Message   modifiying original exhuast manifold haydennzFri, 26 December 2003 22:19
Read Message   Re: modifiying original exhuast manifold feral4mr2Fri, 26 December 2003 23:28
Read Message   Re: modifiying original exhuast manifold haydennzFri, 26 December 2003 23:46
Read Message   Re: modifiying original exhuast manifold feral4mr2Sat, 27 December 2003 02:01
Read Message   Re: modifiying original exhuast manifold haydennzSat, 27 December 2003 02:11
Read Message   Re: modifiying original exhuast manifold AllanSat, 27 December 2003 02:24
Read Message   Re: modifiying original exhuast manifold feral4mr2Sat, 27 December 2003 05:51
Read Message   Re: modifiying original exhuast manifold  oldcorollasSat, 27 December 2003 06:57
Read Message   Re: modifiying original exhuast manifold TE72_TurboSat, 27 December 2003 03:48
Read Message   Re: modifiying original exhuast manifold onejayzedMon, 29 December 2003 03:52
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