JNewman Posted May 20, 2010 Posted May 20, 2010 Does anyone know if SAE 4 836 leaded red brass is forgeable? I have a customer who has a piece of 4" round that he needs upset only about .060". Looks like I should have a copy of the ASTM copper forging handbook. If anyone has a copy of that and can give me a definitive answer I would appreciate it. The finished part is going in a turbine so he would not like to give it a try. Quote
Nakedanvil - Grant Sarver Posted May 20, 2010 Posted May 20, 2010 .060? Why do it hot? Get it under that Massey and wail on it! I've done some leaded bronzes and lost as many as not. VERY narrow forging range. Quote
JNewman Posted May 20, 2010 Author Posted May 20, 2010 Thanks Grant, since I posted here I received a reply from the Copper Development Association who tells me that alloy is not recommended for hot forging, so I was was wondering about doing it cold. My customer is concerned about cracking but I don't think that should be a problem have you forged red brass cold? Quote
Nakedanvil - Grant Sarver Posted May 20, 2010 Posted May 20, 2010 I'd probably anneal it first. You don't need a solution anneal, really more of a stress relieve. You know; slippery hardwood stick hot. Quote
JNewman Posted May 20, 2010 Author Posted May 20, 2010 I'd probably anneal it first. You don't need a solution anneal, really more of a stress relieve. You know; slippery hardwood stick hot. Too late jobs done. I spent longer researching than it took to do 2 of them. Turns out he only needed about .045" on the dia. Material was .015 under 4" he needed 4" finished size. Quote
Nakedanvil - Grant Sarver Posted May 20, 2010 Posted May 20, 2010 That's exactly why people who charge $50.00 per hour only make $20! Quote
JNewman Posted May 20, 2010 Author Posted May 20, 2010 You mean people charge that little???? Forging time is $100/hr. 5 minute COD jobs are $240/hr. Go grab a coffee and come back in half an hour. Perceived value and all. 5 minute jobs for friends and neighbours are free. Quote
JNewman Posted May 20, 2010 Author Posted May 20, 2010 For those that are not self employed, and are thinking "he's ripping people off". I have worked all week and I have probably less than 8 hours of billable time so far this week and I underquoted the job I finished in the first 6 hours of the week so they were for free, so I am at less than $20/hr this week. Quote
Nakedanvil - Grant Sarver Posted May 20, 2010 Posted May 20, 2010 You gotta be getting $100/hr MINIMUM! It just works out that way. Guy comes in, wants something done, you say "fifty bucks". He says "It probably only take you fifteen minutes". "Yeah, plus the time we spent discussing it". He says "What about the guy who talks your ear off and leaves"? I say "Yeah well, you gotta pay for that guy too"! Course, I would never have that conversation, but it illustrates the point. Also comes down to price = X + Y + Z. X is doin' it. Y is having what it takes to do it. And Z is knowing HOW to do it. Lotta people charge the most for "Z", like doctors and lawyers and accountants. Quote
pkrankow Posted May 21, 2010 Posted May 21, 2010 I don't like it when the doc lacks Z. Whether it is knowledge or sleep. Phil Quote
Mills Posted May 21, 2010 Posted May 21, 2010 Now Grant that is as succinct a definition of pricing as I've ever seen delivered. Will get that down in my stride right now. BTW the business discussions on here are very very encouraging. I feel empowered (getting in touch with my liberal side) JNewman, back when I was a good ol boy I'd of said that. Now I believe "by golly what a bargain you gave the man!" Quote
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