The UK's Finest Independent Forum for Shooters and Gun Owners. Est 2010.

Maybe it's the badger's job to know about metals...

And holes...

Understanding the crystalline structure of martensitic stainless is useful when understanding the rifling process.
This gives some good info:
http://en.wikipedia.org/wiki/Martensiti ... less_steel

"Hmm ... ... ... considering the merits of different types of barrel over a pint of worm juice".

Oh indeedy, we always seek to acquire new and useful knowledge - generally beyond what can be gleaned from the internet. Do please enlighten us as to how BCT, BCC and FCC structures interact with the stress fields around the tip of a cutter, and how they differ under conditions of plane stress and plane strain. Perchance you're endeavouring to suggest that you are inducing stress transformations as you cut through the grains and thereby hardening the barrel, enhancing its wear resistance and reducing its susceptibility to erosion-corrosion as particulate laden, high pressure, high temperature gas flows over it at supersonic velocities?

DW58 wrote:"Hmm ... ... ... considering the merits of different types of barrel over a pint of worm juice".

Oh jesus I wasn't prepared for that Rob! Spat tea all over my phone hahahaha. I won't be able to unsee that picture every time I see ol' Meles popping up now.

DL. wrote:Here's another thing, there's a chap on here called RGC who knows a thing or two about rifles, he mentions in his post that 420 grade steel is desirable.
http://www.full-bore.co.uk/viewtopic.php?f=8&t=20932

What grade of steel are you planning on using, or have you used for GB barrels - have you produced any barrels? Are they a similar price to the Border product you used to produce?

Robert (RGC) has been at IWA these last few days however he should be back home very shortly and will hopefully pick this thread up and be able to comment.

Desirable barrel steels, ideally all made by the ESR (electro-slag remelting) process and then cold swaged to bar form.

Carbon
34CrMo4
32CrMoV12.10
40CrMoV12

Stainless
X1CrNiMoAITi12.9.2
X1CrNiMoAITi12.10.2

Dennisgrm wrote:Understanding the crystalline structure of martensitic stainless is useful when understanding the rifling process.
This gives some good info:
http://en.wikipedia.org/wiki/Martensiti ... less_steel

Except 416 and 420 are martensitic, not austenitic.

R.G.C

meles meles wrote:Desirable barrel steels, ideally all made by the ESR (electro-slag remelting) process and then cold swaged to bar form.

Carbon
34CrMo4
32CrMoV12.10
40CrMoV12

Stainless
X1CrNiMoAITi12.9.2
X1CrNiMoAITi12.10.2

I am in humble admiration with your knowledge of such exotic alloys.

However,allow the ignorant to correct about Stainless used for barrels: They are:
416 = X12CrS13, 0,12%C, 12%Cr, +S.
420 = X20Cr13, 0,20%C,13%Cr.

Please, lets recenter the thread around what GB Barrels were to say on their products and being,I think, much ore important for members than this display of 'knowledge'....

R.G.C