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Post by iannrmn on Mar 15, 2010 18:18:54 GMT 1
i found these drawings mabe they will be of use to someone cheers ian Attachments:
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Post by iannrmn on Mar 15, 2010 18:21:25 GMT 1
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Post by iannrmn on Mar 15, 2010 18:22:41 GMT 1
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Post by iannrmn on Mar 15, 2010 18:23:35 GMT 1
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Gripweed
New Member
VHK Erika Brno
Posts: 26
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Post by Gripweed on Mar 15, 2010 20:55:16 GMT 1
Great - thanks a lot!
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Mongo
New Member
Posts: 32
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Post by Mongo on Mar 16, 2010 22:34:28 GMT 1
Thanks, do you have the drawings for the complete technical package?
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Post by iannrmn on Mar 17, 2010 8:24:36 GMT 1
hi ,no at the mo i dont have any more drawings BUT i will keep hunting to see what i can find ,cheers ian
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Gripweed
New Member
VHK Erika Brno
Posts: 26
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Post by Gripweed on Jul 28, 2010 16:35:25 GMT 1
Hi all, I was wondering if anyone has a idea what kind of material were internal Bren parts (firing pin) made of?
I dont think its austenitic inox steel, but surely its HQ material. I was thinking about grade 14xxx CrMo alloy steel (sorry have no idea about British standard) but cant prove it...
Thanks in advance for opinions!
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Post by woodsy on Jul 28, 2010 20:44:57 GMT 1
Whilst CrMo steel like 4140 or 4150 would be perfectly satisfactory for the Bren internal parts, I suspect that a Carbon-Manganese steel was more likely the original material. It is possible that Peter Laidlers book may have this information when we eventually see it. The steel grades would have been based on the Bohler steels used in the ZB26 and later guns. The grades and heat-treatments chosen for the ZB's were well suited to the job as the guns have an amazingly long life.
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Post by woodsy on Jul 28, 2010 21:05:35 GMT 1
Further investigation (page 17 of the Bren Gun Saga) reveals that the steel was Poldi ZTEM, a chromium nickel tungsten steel. It would be interesting to know what the British equivalent was for the Brens.
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Gripweed
New Member
VHK Erika Brno
Posts: 26
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Post by Gripweed on Jul 29, 2010 19:43:34 GMT 1
Thank you, thats very interesting! So its really excellent material even in the present days. It does mean that its HQ stainless steel but what is strange - pin is magnetic! So what kind of inox steel? Not austenitic, hmmm
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