Rust in lands on SS !

[Link]

Good day

I watched a video on cleaning a stainless steel barrel, it said you should be very careful on cleaning, rust could form under the copper left in the bore.
I never thought much about stainless rusting, did you?

Don

 

[mongo chicago]

Thought about it, watched for it, checked for it, but never really worried about it. Stainless never meant that it can't rust, it just "less" prone to it.

 

[hogpatrol]

Barrel 400 series stainless will rust, pit and corrode and is magnetic. 300 series has a different chemical makeup and is resistant to those properties.

400 Series Stainless​

The 400 series group of stainless steels has an 11 percent chromium and 1-percent manganese increase, above the 300 series group. The 400 series is susceptible to rust and corrosion under some conditions. Heat-treating will harden the 400 series. The 400 series of stainless steels have higher carbon content, giving it a martensitic crystalline structure. This provides high strength and high wear resistance. Martensitic stainless steels aren’t as corrosion resistant as the austenitic types.

 

[rijndael]

I don't worry too much about interior rust, I'll probably regret it someday, but it'll be a good excuse to re-barrel. I do clean my guns well after a rainy range day, including removing the action from the chassis to dry things out.

One time I lost interest in shooting. I had a bunch of young kids and family things to focus on. That led to a 6mm barrel going uncleaned for 8'ish years, shot with moly bullets, and never saw any ill effects. I've heard that moly is especially bad for holding moisture. Maybe it's luck or my climate, I'm not sure, but worrying about interior corrosion is not where I need to waste time right now.

 

[Link]

Barrel 400 series stainless will rust, pit and corrode and is magnetic. 300 series has a different chemical makeup and is resistant to those properties.

Most are 400, why not use 300? Is it the cost?

 

[rwj]

Most are 400, why not use 300? Is it the cost?

Mostly due to better wear characteristic…

 

[ACF]

Most are 400, why not use 300? Is it the cost?

Might be because 300 series SS is not hardenable.

Chris

 

[6BRA]

sold guns in store front, back in the 80s a ruger MKII came in that was stainless, and covered in rust from distributor. Returned...they do rust.

 

[hogpatrol]

If you know any machinists, ask them about 300 series stainless. It cuts stringy, work hardens and is tough on cutters and tools. I cut a lot of it for parts used in steam turbines, stators and nozzle blocks.

 

[SKWERLZ]

A dirty bore left with some humidity can cause corrosion issues.
Spots and worms.
I definitely clean more judiciously now that I’m living in the wet side of the state.

 

[Lone Hunter]

I have always wondered if the Tubb Final Finish Bullets would take out the light rust. I think I got the name right. I bought a Stainless TC Encore from a friend who had his safe in the garage with dehumidifiers and it rusted in the bore and barrel and receiver. He lost several nice weapons to rust. Inside and out.

 

[divingin]

Don't know about the Tubbs bullets, but changed my safe from dessicant canisters to a safe heater after noticing a light surface rust on blued steel. Won't help if I lose power, but that's not all that often. Haven't had a problem since.

 

[rijndael]

safe heater

I use one too.

 

[Dusty Stevens]

Eliminator will cause a rusty substance to grow on SS if left there

 

[jackieschmidt]

Might be because 300 series SS is not hardenable.

Chris

^^^^^^^^

 

[JMayo]

Eliminator will cause a rusty substance to grow on SS if left there

it's sure orangeish ...i assumed it was dried cleaner.
I now use a gun oil on last strokes of the rod if they are gonna sit more than a week.

 

[Dusty Stevens]

it's sure orangeish ...i assumed it was dried cleaner.
I now use a gun oil on last strokes of the rod if they are gonna sit more than a week.

I assumed that as well til i left some drips that ran down under the muzzle. When i wiped them off the SS had turned black/blue where it sat

 

[divingin]

Eliminator will cause a rusty substance to grow on SS if left there

Likely as it's water based. As are all (AFAIK) the Boretech line of solvents, and quite a few others.

 

[Nick Caprinolo]

Last thing I do after cleaning is run an oil patch through the barrel. First I do upon arriving at the range is run a dry patch through it. I am 85 years old and have never had rust on any firearm I have owned with the exception of a few I bought used. Oil is your friend.

 

[DickE]

Browning bolt action stainless steel, left in closet, in gun case, from one deer season to the next. Light rust on everything, had to disassemble completely, had to re-bead blast everything. Gun cases are a moisture magnets.