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Gabriel James

Mountain of free steel

10 posts in this topic

so there i was minding my own business when my dad calls me to tell me he had a friend who wanted to give me alll the saw mill blades i wanted. Here comes the potentially upsetting news. WHile i was there he called his distributor specialist and found out that these blades were made from 4150 and 6150, most blades were made out of the latter of the two.

 

1-1.5" widths and a nearly unlimited supply can anyone see a functional purpose for these besides the scrap yard? My heart tells me they will not forge well and play nice.


Thoughts? anyone with experience with these at all?20727150_10154536688005146_1652974516_o.jpg

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well the issue remains that its still quite low on carbon for my likes..

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Yep.  6150 in thick section is a bitch to move under a hand hammer.  Tougher than 5160 by a long shot.  You MIGHT be able to use either of them as laminations with 1095 or similar simple high carbon steel, but you will run into the chromium oxide issues you get with 5160 in pattern-weld.

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looks like you could experiment with a pieces and see how you like the end product...nothing ventured nothing gained

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Unless i hear otherwise, i think im going to be wise and cut my losses on this one. too bad it wasnt 15n20 :(

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sounds fair, think i would get one for some san mai

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I looked up the specs on both steels, and while they probably aren't good for forge welding at all they'd make excellent fillet knives and thin paring knives.  Don't let the carbon content fool you, the other elements add a lot of hardenability.  For instance, the 4150 has an as-quenched hardness between Rc 59 and Rc 65 depending on the exact carbon content, according to the ASM heat treater's guide.  That's right up there with any good blade steel.  I don't remember the number for 6150, but it was around 60 - 62 iirc.  For bandsaw blade and leaf spring use they're tempered back to Rc 50-ish.

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6150 is great for large knives and swords.

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well, i might give the stock removal plan a try, the heat treating regimen looks to be manageable just a bit hotter than normal, i have alot of paring knives and filets i need to make. I just dont want them to be sub par :( for the sake of using cheap supplies

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