Tip & How-To about Chevrolet Corvette

How to heat treat metal

Need a suspension bolt but you have the correct size but not the right grade of steel? All you need is a propane torch & a thermometer that reads up to 2000 degrees. The temprature to get the steel hot at first is 1700 drgrees. A thermometer that reads up to 2000 degrees is better to have than one that reads a lower setting. Upon doing so then you use a channel lock or pliers to DUNK & QUENCH THE STEEL TILL COLD. This will take about 30 to 60 seconds. Next you heat the steel up to 700 degrees and let it air cool until cold. A half inch bolt will take about an hour to cool down before using... This process will give you a grade 80 type of rating. 3/8" at this rating will take a stress of 3500 pounds. . Of course this is rated half of the stress rating which is 7000 pounds. To get a higher rating the steel must be oil dipped to get a 100 grade rating which has to be done at a heat treating facility instead

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Good Day,

I've been in that same sitiutaion myself, best advice I can give you is to go to a hardware store and pickup some penetrating oil, liquid wrench makes a great penetrating oil. While you are there grab a small inexpensive propane torch. Soak the bolts with the penetrating oil for a few hours, then heat it up with the propane torch, repeat this process as necassry.

I hope this helps

Jul 07, 2008 | 1991 Ford Explorer

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