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Thread: simple Hi-Tek coating

  1. #12601
    Boolit Master
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    Quote Originally Posted by Petander View Post
    I made some "Get Well Son" - TMG fireworks for Joe, The Great Inventor.

    NLG bullet really shines here,leaving more powder space with the same OAL. I will be able to safely push this 450 grainer past 2000 fps (610 m/s).

    My alloy is only 12-14 BHN,very malleable. With HP,this is becoming a true varmint load.

    Just shows how this coating does not need super hard alloy, that is a nice looking bullet and anything hit with it would leave a pink mist against that snow. Well done Sir. Regards Stephen

  2. #12602
    Boolit Buddy
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    Can anyone please post a pic of Texas Tea. My search on the interweb turned up empty

    Sent fra min SM-G930F via Tapatalk

  3. #12603
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    I posted a pic, about 450,000 pages ago hahaha. My boolits are the colour of coffee/milk chocolate.

  4. #12604
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    I'm posting this for Joe, due to the fact he can't get pictures to work on here.

    It is heat/time tests done by others that he has received.
    Hooroo.
    Regards, Trevor.
    Australia

  5. #12605
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    Heat resistance of Hi-Tek

    Quote Originally Posted by Ausglock View Post
    I'm posting this for Joe, due to the fact he can't get pictures to work on here.

    It is heat/time tests done by others that he has received.
    Thanks for posting this , much appreciated.

    The credit for this work belongs to Slide.

    These tests were done for all those who were interested in the coatings ability to resist/reflect heat during baking.
    These results also show the ability of the coating to stop heat from Powder burn going into alloy. The film thickness was only 1/2 thou of an inch thick for these tests.

    Experiment
    Oven set at 180C. Two identical calibrated probes were used inserted into holes drilled into both plain and once coated alloy.
    Attached is a graph of time lag caused by 1 coat, of thou coating film thickness.
    At 2 minutes, differential was 20C
    At 3 minutes, differential was 15C
    At 5 minutes, differential was 10C
    At the 6 minute mark, the coating started liquifying and cross linking and temperature of coated cast was 162C, and uncoated cast was approaching 170C.
    During fusion/melting & crosslinking, the differential was much reduced, as the liquified resin conducted more heat into the alloy but continued to remain at about 5C differential up to 180C..
    From 6 minute to about 8.5 minute mark, the differential remained reasonably constant at about 5C.
    At the 9 minute mark, the differential was 2C at about 180C.
    Final temperature of non coated cast was 182C and coated cast was at 180C at same time.

    From test results, it is confirmed, that coating reflects heat, and dramatically slows down heat penetration into alloy, and it does not take much coating thickness to achieve that.

    Graph also shows temperature, with profile changes taking place, when coating begins to heat cure commencing at about 165C onwards, starting roughly at the 6 minute mark.
    From start of cure beginning at about 165C up to 180C, the temperature differential remained at about 5C.
    At the end of baking, there was only a 2C difference between plain alloy and coated alloy.

    This temperature resistance is also shown in Gateways video.
    https://www.youtube.com/channel/UC6x...VEjbLTV4m25gzQ heat test video

    Main reason for these tests, is to demonstrate that it is not oven air temperature that is critical, but actual load temperature is critical to monitor.
    Under cured coatings, can be directly caused by user to think that load was baked correctly as oven was at a certain temperature, but in fact, it the load may not have reached correct cure conditions..
    Hope information is useful.
    Last edited by HI-TEK; 12-04-2019 at 07:11 PM.

  6. #12606
    Boolit Master Avenger442's Avatar
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    Nice work Slide. Ordered a thermometer with K-type thermocouples today. It was about $25 shipped and sounds like a good idea for guys that just have to have the color right.
    While I work at it, it is by God's grace that it happens. So it is best I ask him what, how and when before I start..

  7. #12607
    Boolit Master slide's Avatar
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    Everybody needs to know that this was Ausglock's and Joe's idea sometime back. I just happened to see a post and decided to try it. Good luck Avenger442.If you need help let me know. It is simple or I wouldn't be able to do it.
    Boolits !!!!! Does that mean what I think it do? It do!

  8. #12608
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    Good Job, Mate.
    I did it with my setup, but couldn't be bothered data logging it.
    Hooroo.
    Regards, Trevor.
    Australia

  9. #12609
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    Interesting,thank you Slide.

    I have too much temp variation in my oven for a test like that. Every bullet reads a bit differently anyway, radiant heat beats the cyclone.

    But I can live with it,especially with TMG Gold.

  10. #12610
    Boolit Master Avenger442's Avatar
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    Petander
    I usually agree with you. I'm not really as interested in the color as I am with no leading and group performance. But I need this blue color. It is one of the Auburn colors.

    It is hard to explain to someone that does not live here the rivalry of the two college football teams in this state. Some of us get a little out of hand and there have been some who have ended up in jail because of it. But for the most of us it is just a friendly ribbing (joking or teasing). We wear our colors some even choose the color of their car based on those colors. My wife, who is from another state thinks we are all a little crazy or as she says "stupid". But every year she gets into the same ribbing fun as everyone else. Auburn and Alabama have been competing in the "Iron Bowl" since February 22, 1893. I believe this year was the 187th game. Auburn won the first but Alabama has won thirteen more times than Auburn. Auburn won this year and we have the bragging rights for the year. I was a student at Auburn 1971-1976. And these blue bullets are something the guys at the range will love. Even Wiki has a history of how it all started.
    While I work at it, it is by God's grace that it happens. So it is best I ask him what, how and when before I start..

  11. #12611
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    Quote Originally Posted by Avenger442 View Post
    Petander
    I usually agree with you.
    That's interesting because I disagree with myself all the time.

    But I do understand why you want the blue right. I'd like to get Candy right and Blue is soon on my way, I've been thinking it has to be right so I'll need:

    A) More Cyclone

    B) A heat shield to tame radiant heat from above

    C) Both

    D) Another oven

    A PID only helps after the hot / cold spots are gone.

  12. #12612
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    Quote Originally Posted by Avenger442 View Post
    Petander
    I usually agree with you. I'm not really as interested in the color as I am with no leading and group performance. But I need this blue color. It is one of the Auburn colors.

    It is hard to explain to someone that does not live here the rivalry of the two college football teams in this state. Some of us get a little out of hand and there have been some who have ended up in jail because of it. But for the most of us it is just a friendly ribbing (joking or teasing). We wear our colors some even choose the color of their car based on those colors. My wife, who is from another state thinks we are all a little crazy or as she says "stupid". But every year she gets into the same ribbing fun as everyone else. Auburn and Alabama have been competing in the "Iron Bowl" since February 22, 1893. I believe this year was the 187th game. Auburn won the first but Alabama has won thirteen more times than Auburn. Auburn won this year and we have the bragging rights for the year. I was a student at Auburn 1971-1976. And these blue bullets are something the guys at the range will love. Even Wiki has a history of how it all started.
    All I got to say about that is Roll Tide.

  13. #12613
    Boolit Master Avenger442's Avatar
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    Well Georgia is our longest rivalry. So go dogs.
    While I work at it, it is by God's grace that it happens. So it is best I ask him what, how and when before I start..

  14. #12614
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    [QUOTE=Avenger442;4776601]Petander
    I usually agree with you. I'm not really as interested in the color as I am with no leading and group performance. But I need this blue color. It is one of the Auburn colors.

    Avenger, TRUBLU is already under way to the US. You need to keep in touch with Donnie with arrival/availability situation.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check