Leaded steel

Discussion in 'Metals' started by Rudy, Sep 20, 2017.

Help Support HMEM by donating:

  1. Feb 16, 2019 #21

    kquiggle

    kquiggle

    kquiggle

    Well-Known Member

    Joined:
    May 29, 2012
    Messages:
    350
    Likes Received:
    103
    OnlineMetals has a good description:

    https://www.onlinemetals.com/productguides/steelguide.cfm

    Here's an excerpt:

    1144 (Stressproof-equivalent) steel
    This material is actually pretty cool, at least for steel. It is a higher-strength alloy than 1018 or A36, but in addition has improved ductility as well. The chief feature of 1144 steel, however, is that it has very low distortion or warpage after machining due to a combination of its chemistry, method of manufacture, and heat treatment. Finally, 1144 is relatively easy to machine, with a machinability rating of 83% of AISI 1212 steel.​
     
  2. Feb 16, 2019 #22

    Charles Lamont

    Charles Lamont

    Charles Lamont

    Well-Known Member

    Joined:
    Mar 24, 2011
    Messages:
    556
    Likes Received:
    147
    In the UK an 'Emergency number' for steel grading was introduced during WW2. It numbered steels from 1 to 58 in increasing alloy content. A 1955 revision of the original 1941 British Standard, BS 970, introduced postscript letters to the series. In spite of this standard being long since obsoleted, several times over, steel grades in the UK are still widely referred to by En number, becauses the system is simple. Low-carbon, low-alloy, free-cutting, leaded mild steel is En1A.
     
    goldstar31 likes this.
  3. Feb 16, 2019 #23

    rmd55

    rmd55

    rmd55

    Member

    Joined:
    Jan 19, 2016
    Messages:
    8
    Likes Received:
    3
    A specialty steel product produced with an innovative process. StressProof® is produced using a proprietary process that draws the bar through a special die under heavy draft, then stress relieves it in a precisely controlled furnace. Trademark of Niagara LaSalle, may be why it is not available down under.
    If you look at the micro-structure of leaded steel you can see the lead dispersed as small pockets of free lead much like carbon in cast iron. Not dissolved in the iron so it acts as a dry lube
    Richard
     
    goldstar31 likes this.
  4. Feb 16, 2019 #24

    DJP

    DJP

    DJP

    Well-Known Member

    Joined:
    Dec 7, 2012
    Messages:
    468
    Likes Received:
    114
    Stress relief by controlled heating is still required after welding. I doubt that for hobby machining there is any stress induced but if there is a weld, removing stress before final machining I thought was common practice. When welding a sub assembly there isn't a stress proof steel at least not one that you would bet the company on.
    A friend owns a business making jigs for the automotive assembly process. He removes stress after welding and before final machining.
     
    goldstar31 likes this.
  5. Feb 17, 2019 #25

    harborfreight8x12

    harborfreight8x12

    harborfreight8x12

    Member

    Joined:
    Oct 30, 2010
    Messages:
    10
    Likes Received:
    1
    My personal experience with 1144 StressProof steel. Years ago, my brother-in-law broke the drive axles in both of the motors in his bariatric power wheelchair. I needed a material that meet the requirements for drive axles. 1144 StressProof was the fit. It machined well and the motors served until Medicare replaced them with new motors two years later. So, JMHO, go with 1144.
     
  6. Feb 17, 2019 #26

    GailInNM

    GailInNM

    GailInNM

    Administrator Staff Member Administrator Global Moderator

    Joined:
    Feb 17, 2008
    Messages:
    2,204
    Likes Received:
    331
    1144 is also available as TGP (Turned Ground Polished) for use in Swiss style CNC lathes. It costs more of course but can save considerable time when making some parts as the OD is accurate enough for bearing fits with out any additional work.
    Gail in NM
     
  7. Feb 18, 2019 #27

    mohavegun

    mohavegun

    mohavegun

    Active Member

    Joined:
    Jan 15, 2018
    Messages:
    42
    Likes Received:
    14
    My favored screw machine stock is 12L14 and I do my own centerless grinding when necessary, I operate 3 Brown & Sharpe screw machines and a Royal Master centerless grinder in my shop. I also like 1045 stress proof.
     
  8. Feb 18, 2019 #28

    mohavegun

    mohavegun

    mohavegun

    Active Member

    Joined:
    Jan 15, 2018
    Messages:
    42
    Likes Received:
    14
    Has anyone out there tried PEEK plastic as a material for making piston rings for steam engines? This is an interesting plastic, machines like brass and when burned the chip more resembles glass chips than ash. Wear qualities are off the scale for plastic and it is good with the heat in steam engines...
    PEEK is polyetheretherketone.
     
  9. Feb 18, 2019 #29

    Shopgeezer

    Shopgeezer

    Shopgeezer

    Well-Known Member

    Joined:
    Dec 14, 2018
    Messages:
    67
    Likes Received:
    2
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Canada
    Where do you get it?
     
  10. Feb 18, 2019 #30

    john futter

    john futter

    john futter

    New Member

    Joined:
    Dec 4, 2018
    Messages:
    2
    Likes Received:
    0
    Gender:
    Male
    Location:
    New Zealand
    Any proffessional plastics supplier will get it for you
    It makes Teflon look very cheap
     
  11. Feb 19, 2019 #31

    karlw144

    karlw144

    karlw144

    Member

    Joined:
    Feb 20, 2010
    Messages:
    17
    Likes Received:
    1
    Just googled it.PEEK 2” diameter rod, 12” long. $273 plus s&h
     
  12. Feb 19, 2019 #32

    Shopgeezer

    Shopgeezer

    Shopgeezer

    Well-Known Member

    Joined:
    Dec 14, 2018
    Messages:
    67
    Likes Received:
    2
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Canada
    Ouch! Pricey. Teflon is cheaper.
     
  13. Feb 19, 2019 #33

    rmd55

    rmd55

    rmd55

    Member

    Joined:
    Jan 19, 2016
    Messages:
    8
    Likes Received:
    3
    That's why McMaster sells it in 3", 6", 9"as well as foot lengths to 8ft
     
  14. Feb 20, 2019 #34

    mohavegun

    mohavegun

    mohavegun

    Active Member

    Joined:
    Jan 15, 2018
    Messages:
    42
    Likes Received:
    14
    Hello,
    The shop I worked for bought it from "McMaster Carr" corporation in Santa Anna California, they ship worldwide and carry all sorts of things, find them at Mcmastercarr.com .

    We made big pump rings out of it, the pumps were working in a steel mill in Kingman, AZ. The PEEK rings outwore the silicon bronze rings by a factor of two times life. The environment was the pumps handled cooling water for the rolling line, the water was heavily contaminated with acids, chemicals and steel particles from the steel, rust, dirt and sand! Some of these pump rings or lantern seals were more than a foot in diameter. Yes, the material is expensive but it is extremely durable, makes Teflon look like butter!

    Rod
     
  15. Feb 20, 2019 #35

    mohavegun

    mohavegun

    mohavegun

    Active Member

    Joined:
    Jan 15, 2018
    Messages:
    42
    Likes Received:
    14
    Just a further comment about 12L14, it was originally designed for screw machine production for the automotive industry. It is in the 100% machinability index for steels, most others are compared to it! I buy for my shop from FRY steel corp in California... They generally only sell in specific quantity lots but will sell small units, expect to pay for packaging and handling on small orders. I stock it in my shop in .130 and .343 diameters and produce parts which are .125 and .312 diameters from it. I centerless grind this material and will sell small quantities if you are interested. I do not want to make a business of it but it is something available in my shop. I also have 1/4" 6061 aluminum and 26o series brass HEX barstock and can supply that as well if anyone is having problems finding such.
     
  16. Feb 20, 2019 #36

    kquiggle

    kquiggle

    kquiggle

    Well-Known Member

    Joined:
    May 29, 2012
    Messages:
    350
    Likes Received:
    103
    McMaster Carr has everything - but you pay top dollar. If you shop around the Internet at the "usual suspects" you can find it much cheaper. I found 3/4" Diameter PEEK 450G Rod (12" length) for $25 without looking too hard. Just search ebay or amazon for "peek rod".
     
  17. Feb 20, 2019 #37

    Johno1958

    Johno1958

    Johno1958

    Well-Known Member Project of the Month Winner HMEM Supporter

    Joined:
    Sep 19, 2015
    Messages:
    218
    Likes Received:
    73
    Here in Australia I can not seem to get 12L14 steel but can get S1214 which I believe to have sulphur instead of lead in it. I have yet to use it but wonder at the difference
    in machining of the two. I also bought some 12mm PEEK of Ebay, 15 dollars per 200mm from China .Unfortunately I could not get white it is the natural color which is
    a very light tan color.
    John
     
  18. Feb 21, 2019 #38

    Cogsy

    Cogsy

    Cogsy

    Well-Known Member Staff Member Global Moderator

    Joined:
    Jul 30, 2012
    Messages:
    2,506
    Likes Received:
    724
    Gender:
    Male
    Location:
    Perth, Western Australia
    Unfortunately McMaster Carr will only ship internationally to their "established customers" (meaning something like companies that had an account prior to them making this decision) and refuse all orders from new, non-account, international customers. They won't allow new international customers to open an account either. I'm pretty sure they won't even ship to Canada let alone the rest of the world. It's a pity, they seem to have a good range of stuff.
     
  19. Feb 21, 2019 #39

    Johno1958

    Johno1958

    Johno1958

    Well-Known Member Project of the Month Winner HMEM Supporter

    Joined:
    Sep 19, 2015
    Messages:
    218
    Likes Received:
    73
    I am finding that a lot with US gear even on Ebay. A 10 dollar item and they charge 150 bucks or more to post it. I think they have got such a large domestic market we
    would not be worth the hassle down here in Australia not to mention the amount of times they must get ripped off by parcels not delivered or damaged.
    Its a shame because of the lack of variety of tools and materials specially if you live in a regional area.
    John
     
  20. Feb 21, 2019 #40

    SailplaneDriver

    SailplaneDriver

    SailplaneDriver

    Well-Known Member

    Joined:
    Nov 27, 2017
    Messages:
    60
    Likes Received:
    8
    Gender:
    Male
    Occupation:
    Retired Electrical Engineer
    Location:
    Woodinville, WA
    You can get 12L14 from Hobby Metals in small quantities.
     

Share This Page