Appropriate uses for Linotype

[Rick]

So that's what your using those empty tins for.

 

[Winelover]

Eighty three (30 cal) bullets will fit in the rectangular can. I remove the lid and burn the coating/paint off the can with a propane torch, first.

 

[Rick]

The flat bottom spaghetti drain pans I use hold like 300 35 caliber bullets and I can stack three pans.

 

[Winelover]

Have an old expandable grill basket (with 3/8" holes) that I put the tins in.......so I can load the oven and then quench at once.

 

[Ian]

Three weeks age time minimum, John. I've mentioned that so many hundreds of times I figured everyone on the internet was up to speed by now.

 

[Winelover]

Maybe for A/C......I doubt that the H/T will ever get close to 20-22 BHN.

 

[Ian]

Thomas didn't think so, either

Low antimony alloy not containing much in the way of grain refiners takes its time getting tough after a heat treat. Add a little more tin and it takes even longer. I've done this with good pig lino and gotten 20 no problem. That's 3:1 pure/lino.

 

[Winelover]

Next time I see Rick, I will have him recheck the BHN....and we'll see.

 

[Rick]

The age hardening time curve will be determined by the percentage of Sb. Very low Sb, 1% or so could take 2-3 weeks. Faster at 2%, faster yet at 4% etc. Sn in high enough percentage 4-5%+ will limit the amount of quench strengthening that's possible. Sn around 1-2% will have minor effects on both the time curve and the max strengthening achieved.

 

[Winelover]

Sn around 1-2% will have minor effects on both the time curve and the max strengthening achieved.

That's why I don't expect, much or any change in BHN, after 6 months. The alloy in question (3/1) only has 1% Sn.

 

[KHornet]

I find it interesting that old Lyman manuals, specified linotype for
a large percentage of cast bullets, and #2, for the most part for
the remaining. As for me, I like pure lino when I can get it for
all of my 22 cals, because it just works better than anything else,
and weighs more consistently than any of the alloys I use.

Paul

 

[Winelover]

Three weeks age time minimum, John. I've mentioned that so many hundreds of times I figured everyone on the internet was up to speed by now.

Got the results from Rick. Both the air cooled and heat treated (3 pure -1 Lino) consistently lost 2 BHN. After 5 months, AC was 7 BHN and HT was 14 BHN......so much for gaining while sitting a minimum of 3 weeks. Far cry, from 22 BHN that you had claimed was possible.

 

[fiver]

how did you get a 3% antimony alloy down to 7 bhn.
1% antimony would be 7bhn.

 

[Winelover]

By combining three 5# Rotometal ingots of pure, with one 5# ingot of their Lino stamped one. That's what the alloy in this discussion is about.

 

[fiver]

that should give an alloy of 1% tin and 3% antimony.
it's base bhn should be more like a 11-12.
7 is too low.
and just dropping it from the mold at about 370-f into room temp water would give about an 18.

 

[Winelover]

Well it ain't......that or Rotometals Lino, isn't actually Lino.

 

[smokeywolf]

SOWW are nearing pure and are often at or near 7 BHN. Not doubting your word Winelover, but that's interesting that 25% lino can come out at the same BH as the SOWW.

 

[Rick]

SOWW are nearing pure and are often at or near 7 BHN. Not doubting your word Winelover, but that's interesting that 25% lino can come out at the same BH as the SOWW.

Yep that sure would be interesting. What is even more interesting is to cut lino that much with pure and better than double the Sb. Yep, interesting indeed.

I haven't done the math on his alloy but something sure does seem amiss. John, why not empty your pot and melt just one of the Roto lino ingots paying close attention to the melt temp. Cast a few and we can check the hardness of just that metal. I seriously doubt Roto would try to pull a fast one but anyone can make a mistake.
.
.

 

[S Mac]

All the recommendations have been pure or near pure PB, lino alloy. I take it that COWW, lino would be excessive antimony?

 

[Winelover]

RCBS Pro Melt was empty when I added the 4 ingots......seems that Rotometal's Lino isn't what it's suppose to be.