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Thanks for your response, Michael. Indeed, my main requirement is yield strength. I need only moderate corrosion resistance as I don't live in an overtly humid climate or anywhere near the sea.

@tbuelna - The key factor here is Volume. It means I'll be charged at an exorbitant rate to plate a couple of feet of material. Which I presume would run me the same cost of using SS. Also since heat treatment is no longer an option, I need some work hardening variant of steel.

Thanks Ed. The OD is what would be turned down from 60.3mm to 50mm; roughly a 5mm or 0.197" total depth of cut. The ID would be counter bored as you mentioned along with snap ring grooves. The nearest tube size available for my design has an OD of 60.3mm and wall thickness of 11.1mm (Schedule...

Bang on Ed! In fact after the nickel price surge in the 1980s, my country (India) became a huge producer of the 200 series. Also thanks for the data. I'll pass it on to my supplier. Doubt that he would know anything about elongation. While we are on the subject of austenitic stainless steels...

Don't think so. 6150 has got more tensile strength than 5160. Others may confirm please.

Afaik 52CrMoV4 is same as 6150 which has a tad more Vanadium than 5160.

How does the diameter of the round change how much cold reduction is required to achieve a particular UTS?

You're in the USA I believe? Where I live 204Cu is available abundantly. But thanks for the 301 tip. I'll take a look at it. Cost is also a major factor here.

Thanks Ed, The data I pulled suggests 175 ksi UTS at 50% cold draw with 27% elongation. Is this too deviating from experience? I don't know for sure the actual source of the material. I'm getting it from a local stainless steel dealer, who himself had suggested this alloy when I told him I was...

Thanks Ed. Does the material knurl the same as any other steel hardened and tempered to a similar hardness? I am asking this because I've come across data (link: http://www.ulbrich.com/204cu-stainless-steel/) which suggests that cold rolled 204Cu has higher elongation stats than, say, QT...

Wouldn't the cost be prohibitive? A local dealer has confirmed that he has 204Cu in stock and could get it cold drawn to whatever percentage specified.

I am trying to steer clear of Duplex and PH stainless steels. Cost and availability is a big factor here. What I intend to know is would 204Cu work the same as any other high strength steel while offering moderate corrosion resistance? If you may recall I had posted a thread about selecting a...

While researching some high strength steels I came across 204Cu which apparently offers quite high tensile strength values depending on how much cold reduction it's subjected to. What difference would there be between heat treated stainless steels and cold worked 204Cu? I am looking at 150 ksi -...

But I've read that weightlifting barbells (usually made from 4140 HT, 4340 etc.) return to original straightness even if it has been stored loaded for months.

I found out that the knurl depth is directly related by the TPI of the knurl which is again dictated by the bar diameter. So on a 28.5mm bar a 20 TPI knurl would be used to prevent double tracking. So the knurling depth is not really something I can control.

@ CoryPad - Okay but if I knurl prior to HT and leave machining allowance, wouldn't the knurls get destroyed by machining? Straightening by a hydraulic press sounds fine. Also how likely is it that the bar will bend uniformly? @tbuelna - The only requirements the knurling is supposed to meet...

Is this roll formed or cut? http://i2.wp.com/www.garage-gyms.com/wp-content/uploads/2014/11/klokov-knurling-close.jpg By the way this is a 264000 psi steel bar.

Okay so I visited my dad's friend today. Sounds like he can only do HT by conventional oil quench and furnace temper. However since he's basically getting this done for free, he has asked me to give him the complete HT operation cycle and drop the bar at his place. As attached my bar is a long...

Okay, so I could skip stress relieving if I get the stock in the Annealed condition, right? Also given the section size (28mm dia), the bar would probably get through hardened by induction heating.

As far as I'm aware, stress relieving is done after machining/knurling. What stresses could exist prior to machining? Also does anything change if I'm heat treating by induction heating method?