scotto Posted September 29, 2015 Share Posted September 29, 2015 I've been putting together a scrap pile and so far have aquired a few coil spring and two sets of leaf springs off an old Dodge pickup. There is an oprotunity for me to pick a few hydraulic and air cylinder arms. These are chrome plated and will be 1.25 to 3" in diameter. Does the chrome cause a problem and what would this type of scrap be used for.Scott Quote Link to comment Share on other sites More sharing options...
EricJergensen Posted September 30, 2015 Share Posted September 30, 2015 Yes. The chrome is a problem. Burning it off will produce some hexavalent chromium, which is a cancer risk if inhaled. It may also have nickel and copper under the chrome it as well. Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted September 30, 2015 Share Posted September 30, 2015 For me scrap I am unwilling to use in the forge generally goes to the scrapyard to fund withdrawals from same... Quote Link to comment Share on other sites More sharing options...
ianinsa Posted September 30, 2015 Share Posted September 30, 2015 (edited) Rams are usually a very tough material (over and above the hard chrome finish) and while I won't attempt to forge with them they can be very useful for shafts and especially as rollers etc. If you are getting them 'gratis 'Take them and store for use as 'other not for forging' . Edited September 30, 2015 by ianinsa Quote Link to comment Share on other sites More sharing options...
WL smith Posted October 1, 2015 Share Posted October 1, 2015 Take them to a chrome shop they will more than likely strip them for free for the chrome. Quote Link to comment Share on other sites More sharing options...
ptree Posted October 3, 2015 Share Posted October 3, 2015 The standard rod material for cylinders is IHCP. that is induction hardened, chrome plated and then ground. As IANINSA notes very good shafting. Not so good for forging. You can cut with an abrasive saw. Be aware that the surface with the Hard chrome, and the induction hardened case and core is harder than woodpecker lips and will dull any toothed saw. But great for shafts. You can if you have a lathe use a carbide tool and from the end enter the steel from about 0.015" under the chrome and turn the od. This will pop off the chrome and the hardest part. then you can drill for cotter pins or even thread the shaft. This is the method used when the shafts are made in the cylinder factories to allow threading of the already hard shafts.These have a perfect finish at about 32 micro-inch for oil lubricating plain bearings and seals. Unless the shaft is scored don't polish as you already have a nearly perfect diameter and finsh for a shaft. Quote Link to comment Share on other sites More sharing options...
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