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orangereborn 
Orange Level
Joined: 12 Sep 2009
Location: NW WI
Points: 1478
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 Topic: Harden Round Stock
Posted: 21 Feb 2010 at 4:37pm |
Where can I get 3/4 round stock in bolt type strength. Like grade five or eight or isn't there such a thing. I thought there was something like drill rod but I am thinking that is too hard to work with. Need some pins but must be able to drill it. Or any suggestions?
Thanks.....Dale
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GBACBFan
Orange Level
Joined: 11 Sep 2009
Location: Green Bay WI
Points: 2662
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Posted: 21 Feb 2010 at 4:41pm |
Depending on the length of rod you need, you can buy long grade 5 or 8 bolts and cut the threads and head off.
McMaster Carr has both grade five and grade eight 3/4" up to 12" long (10"+/- of usable shaft between head and threads) They're around 8 bucks apiece. I usually get next day delivery from them on items.
Edited by GBACBFan - 21 Feb 2010 at 4:51pm
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CTuckerNWIL
Orange Level
Joined: 11 Sep 2009
Location: NW Illinois
Points: 22825
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Posted: 21 Feb 2010 at 5:13pm |
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Drill rod is easily machinable. It has to be heat treated to be hard. I don't know what your application is but you can buy 4140 prehard material that is machinable and will work harden with wear. Machining 4140 has to be done right or you could work harden the material while drilling and then you will have trouble.
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steffensen
Bronze Level
Joined: 19 Feb 2010
Points: 44
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Posted: 21 Feb 2010 at 5:27pm |
There is a such thing. You could use a AISI 1080 or a AISI 4140. But to get to 5 or 8 yields you will need the specify that its hardened. At these strengths you will need more than a regular hand drill to create a good hole in it. Depending on where you are at in NW WI there is a couple of steel suppliers in Minneapolis/St. Paul, MN that would deal with this. One of them is Chicago Tube and Iron should be able to help you, but they are a larger supplier and the costs might be high for just a little bit of material. Or if you have your own favorite fab/weld shop just tell them you are looking for round stock that is 120-150ksi yield strength. They should be able to contact their steel supplier to get anything you want.
One note, Its really going to depend on what your intentions are. The material requirement would be different if you just wanted to do some machining on it, than a material you wanted to weld to. Also you can get a cheaper or widely found grade bar, do what ever you want to do to it and have it hardened. Such as 8620.
Was typing at the same time as tucker, but agree with him.
Edited by steffensen - 21 Feb 2010 at 5:52pm
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Tracy Martin TN
Orange Level Access
Joined: 11 Sep 2009
Location: Gallatin,TN
Points: 10761
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Posted: 21 Feb 2010 at 5:52pm |
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Dale, Shoot me a drawing of the pins. I will try to get them to you soon. Tracy Martin
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Gerald J.
Orange Level
Joined: 12 Sep 2009
Location: Hamilton Co, IA
Points: 5636
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Posted: 21 Feb 2010 at 6:11pm |
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Stressproof is a nice tough steel. It takes a good load and its machineable without heat treating. googling for its properties its 100K psi yield, 115K psi tensile strength.Grade 5 is 105K psi. Some links I found think its poor for fatique because the additives that make it machine easily and the fact that its strength comes from several cold working.
McMaster-Carr lists lots of tool steels, oil, air, and water hardening plus prehardened.
If the diameter tolerance of a bolt is close enough it may be the best source of high strength material IF it can be traced to an American maker. Off shore may be any old scrap marked higher than it really is. A responsible bolt shop will be able to trace every bolt in the place back to a reputable maker. A big box store bolt may have come from India or China with all rules ignored.
Gerald J.
Gerald J.
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Dick L
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Joined: 12 Sep 2009
Location: Edon Ohio
Points: 5087
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Posted: 21 Feb 2010 at 9:25pm |
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I like Vicount 44 rather than 4140. It machines (drill and tap) better/easier for me/us. Have used the vicount for threaded inserts in plastic molds as well as cavitys.
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Rick of HopeIN
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Joined: 11 Sep 2009
Location: Hope, Indiana
Points: 1324
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Posted: 22 Feb 2010 at 8:14pm |
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you can get high grade studs if you can find the length you need.
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