Help Needed - Lower Mainland M14 Owner *UPDATED*

[recce]

^^^
Thanks for posting! I have not done the receiver/barrel yet, but did some of the small parts at 350 max for 30 mins.

Not all areas of the parts were coated, and on the un-coated areas I saw no colour change except for the fact that any remaining traces of oil/grease had cooked off and dried out.

I think I'll play it safe and keep the max to 250-300 for the receiver.

Thanks again for the info.

 

[ThatM305Guy]

350 is plenty fine. Anything hardened and tempered at 350 would be brittle as hell. There are pleeeenty of people who cerekote their barrels/receivers (which is baked at 350 as previously stated) Even manufacturers do it from the factory. But 500 I think is definitely pushing it as far as safe heat is concerned. (but again I dont know what the heat treatment process is on these receivers.)

 

[recce]

Thank you Sir.

 

[73582]

Nice Rig you have there Saryet...Look forward to hearing about load development.

 

[Saryet]

Nice Rig you have there Saryet...Look forward to hearing about load development.

That will be the next big step - reloading. I have one big project to finish off (wife's rifle I am building) and then it's diving into the reloading world big time.

-Saryet, out!-

 

[j_06]

I've had a few barrels that were "bears" to remove on norks..... Like 6 foot cheater bar and 2 strong lads tight.....

The last one that was bad (probably the worst yet IMHO) when I finally broke it loose, it hand tightend at 30 degrees.... I estimate 250+ ft lbs to beak it loose.....

I scrapped the barrel, as I am sure the threads were stretched pretty good, and the face of the receiver was "marked up" pretty good too.....

I've also had a few that were hard to remove due to "rust welding".... Which isn't actually all that bad, a wire wheel to remove the rust and "Bobs your uncle!".

I could very easily remove the barrel for ya, but Barney is way cheaper than I am.... And probably better at than me too!

Cheers!

Yo needed two guys and a snipe to break 250lbs?? I suspect it was on a lot tighter than 250lbs

 

[ghostling]

^^^
Thanks for posting! I have not done the receiver/barrel yet, but did some of the small parts at 350 max for 30 mins.

Not all areas of the parts were coated, and on the un-coated areas I saw no colour change except for the fact that any remaining traces of oil/grease had cooked off and dried out.

I think I'll play it safe and keep the max to 250-300 for the receiver.

Thanks again for the info.

Tempering temperature and colour of carbon steels

Temp in C	Colour	Application
220	Pale yellow	Hacksaw blades
230	Light yellow	Planing and slotting tools, hammers
240	Straw yellow	Milling cutters, drills, reamers
250	Dark yellow	Taps, dies, shear blades, punches
260	Brown-yellow	Wood drills, stone-cutting tools
270	Brown-purple	Axe blades, press tools
280	Purple	Cold chisels, wood chisels, plane blades
290	Dark purple	Screw drivers
300	Dark blue	Wood saws, springs
450-700	Up to dark red	Great toughness at expense of hardness

I've made springs before by tempering to dark blue.. it was fun.