.049" sidewall SS tubing. Flare tool? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 04-22-2010, 01:25 PM
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.049" sidewall SS tubing. Flare tool?

Been looking around trying to get this tubing flared. No one seems to have equipment heavy duty enough to do it. Anyone know of a tool capable?

thanks

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Old 04-23-2010, 01:22 AM
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you didnt mention what grade the tubing was, nor its state of heat treatment or the size...is it seamless or ERW, single or double flare.
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Old 04-23-2010, 06:43 AM
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Single flare, seamless, 304 stainless. Not sure on the heat treatment.
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Old 04-23-2010, 08:17 AM
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Ayuh,... 3/8th" or 3" diameter,..??
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Old 04-23-2010, 08:30 AM
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If it is standard size tubing like used for brake lines etc, you can flare 304 with a standard flaring tool. Although the 304 is a little tougher, clamp the tube with the bar portion of the flaring tool. Then clamp that in a vise that has non-serrated jaws (jaws without the teeth). Let the bar portion of the flaring tool rest against the side if the vise jaws. Then flare away. The extra clamping from the vise will keep the tube from slipping through the flaring bar.
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Old 04-23-2010, 12:18 PM
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The tubing is 1/2", the wall thickness of the pipe is .049". There is no way in hell a standard hand flare tool is going to put a dent in this stuff.
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Old 04-23-2010, 10:17 PM
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A Ridgid 458R eccentric flaring tool should flare it with no problem if the tube is annealled. If stainless tubing is flared in any state other than fully annealled, its real likely to crack either when its flared, or shortly after when exposed to any sort of vibration.

304 tubing is available in dead soft, and 1/4, 1/2, and full hard tempers. The hard tempers are achieved by work hardening which occurs during the process of forming and drawing the tube.

Any SS tube sold specifically for hydraulic pressure use in sizes that typically require bending and flaring are normally dead soft (fully annealled). You can anneal the end of the tube with a torch by heating it to yellow heat (hotter than red) and dunking it in water. If it flares easier, then it wasn't dead soft to begin with. The significance of the temper of SS tube as it relates to bending or flaring is that the harder the tube is, the stronger and more resistant to any sort of deformation it becomes. But, as the tube gets stronger with increasing hardness, it also becomes less ductile, so its more prone to cracking from the stretching action of flaring or from the additional work hardening effects of vibration.

Any SS tube used in a critical automotive application such as brakes, fuel lines, etc should be selected carefully since the harder grades aren't nearly as forgiving as mild steel tubing.
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Old 04-24-2010, 10:00 AM
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.049 wall is way to heavy. I use .028 in SS. Burst straingth is still above what is needed for automotive. with 1/2" it must me fuel or oil. way overkill at .049
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