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| Messages 1 - 9 of total 9 in this topic |
El Bucanero
climber
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Topic Author's Original Post - Oct 17, 2010 - 06:33am PT
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I decided to try make some angle pins.
I found annealed spring steel strip to SAE1055.
My plan was to cut and form them in the annealed condition, then heat treat afterwards.
I have been told to heat treat as follows:
To harden heat to 800 to 850 degC - cherry red to bright cherry red.
Quench in oil.
Temper at 300 degC - heat evenly to full blue to pale blue, steel must not be oxidised when you heat to temper or you won't see the colour. Clean with emery cloth prior.
Air cool.
Your temper is critical - you want toughness, not hardness.
Any thoughts, advice appreciated!
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Peter Haan
Trad climber
San Francisco, CA
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Oct 17, 2010 - 09:20am PT
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Why are you using 1055? All the angle pitons in the modern era have been either Chrome-Moly (4130 or similar) or one of the aluminums.
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Steve Grossman
Trad climber
Seattle, WA
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Oct 17, 2010 - 01:47pm PT
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Angles are cheap and almost passe these days...do you really have the hobby jones that bad?
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El Bucanero
climber
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Topic Author's Reply - Oct 18, 2010 - 04:54am PT
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Why are you using 1055? All the angle pitons in the modern era have been either Chrome-Moly (4130 or similar) or one of the aluminums.
Spring steel is similar to CroMo and appropriate. Aluminium? Are you sure?
Angles are cheap and almost passe these days...do you really have the hobby jones that bad?
I agree. I wouldn't bother except that I work in a engineering shop and it's easy and cheap to make them.
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GrahamJ
climber
In the rain
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Oct 18, 2010 - 07:44am PT
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El Bucanero? You sound like a gay pirate. I have nothing else constructive to add to this thread.
Oh wait I do - in AMERICA, it's spelled Aluminum.
Graham : )
Added for clarification:
How's the toe? Back to 100%?
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couchmaster
climber
pdx
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Oct 18, 2010 - 10:12am PT
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Why be a dickhead GrahamJ? Good luck with your project on the pitons. Sounds fun El Bucanero.
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guido
Trad climber
Santa Cruz/New Zealand/South Pacific
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Oct 18, 2010 - 11:42am PT
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Good luck with the project and don't worry about the guest appearances of the cast of "Grumpy Old Men."
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Ihateplastic
Trad climber
It ain't El Cap, Oregon
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Oct 18, 2010 - 11:51am PT
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I have nothing else constructive to add to this thread.
Clearly, THAT was true.
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FRUMY
Trad climber
SHERMAN OAKS,CA
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Oct 18, 2010 - 11:58am PT
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good luck. if you are having fun you are doing good. 1055 is a high carbon metal. but in reality nothing like 4130- 4140 cro. 4130-40 are much harder to work with & much more durable. the 10xx series is a carbon steel - heavy - with no corrosion protection. 1055 would be extremely high in carbon 0.55 % . if heat treated properly it would be very strong & very brittle. you need nickel or chromium if you want any flexibility & corrosion protection. the 10xx series are easily machined -easy to work with, but the wrong metal for climbing. I know that the 40xx are hard to work with but the right metal. you will learn a hell of a lot more working with the 40xx series.
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