[TheForge] Swedish steel

[Stephen Viola]

Hi and thanks Grant...

I have now managed to locate the following information:

BOFORS CRO 861 is the same as..

American Steel Standards Specifications : "Construction steel" 4337

German Steel Standards Specifications : "Construction steel" W-Nr.
6582 (35 CrNiMo 6)

Swedish Steel Standards Specifications : "Construction steel" SIS 2541

I can see from the German description that it contains Chromium,
Nickel and Molybdenum but not sure of the percentages. On the
otherhand I am quite familiar with construction steel and it's
usefullness.

Thanks again.

Wombat


On 28/11/06, Grant Marcoux <gblacksmith at alamedanet.net> wrote:
> This is a Bofors construction grade steel (CRO).  I could fing no listing for the FR prefix.  Test the hard steel with a sharp file....if te file just slides it could very well be cast iron, but I'm not used to seeing it in round form.  It could also bea very red-hard steel.  Grant
>
> -----Original Message-----
> From: theforge-bounces at mailman.qth.net
> [mailto:theforge-bounces at mailman.qth.net]On Behalf Of Stephen Viola
> Sent: Monday, November 27, 2006 2:16 PM
> To: Sponsored by ABANA
> Subject: [TheForge] Swedish steel
>
>
> Hi all!
>
> I've been offered a stack of metal and I'm not entirely sure what it
> is. I haven't been able to get my hands on any so no information about
> anything really.. other than the following.
>
> Swedish metal called:
>
> BOFORS FR 86
> &
> BOFORS CRO 86 (861)
>
> As the company has long since joined the rhealm of the dinosaurs I
> can't find any information about this metal.
>
> Any info would be much appreciated.
>
> OK next problem..
>
> I've just bought myself around 17kg of round stock. The diameter is 9
> cm and about 40 cm long. I was intending to make some candle holders
> using the mighty 60kg Russian built power hammer.. only the
> "välivasara" the tool needed to form the indentation in the metal (the
> english name escapes me just now), just bounced off it like a rubber
> ball! Incredibly hard material.. it seems to be cast iron of sorts.
> Judging by the color and marks on the out side of the metal my
> colleagues deem it to be "valurauta" (cast iron) as well.. today I ran
> hardening test on it and found it to have quite fine grain around 600
> - 700 degrees C. burnt to a crisp around 1000 degrees and when cooled
> had a golden shine to it. I'm clueless as to what this may be and the
> young guy at the junk yard was not very helpful. Any ideas regarding
> not only what this forge resistant material may be but also what to do
> with it??? I'm thinking of using it for a series of guillitine bases
> or silver smithing anvil.. more than likely it will be tossed onto the
> "I'll deal with that later pile!" I know you all have one of those!!!
>
> Anyway any help regarding this would also be much appeciated.
>
> Wombat
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