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 4140 armor

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Don Doerfler
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PostSubject: 4140 armor   Mon Jan 30, 2012 4:54 pm

I was woundering what I should have a .08 piece of 4140 amor hardened to

any comments would be appreciated
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Camden W
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PostSubject: Re: 4140 armor   Mon Jan 30, 2012 6:45 pm

Depends on what you are trying to protect, where it's being mounted on the bot, and what weight class the bot is in. Personally I have no idea beyond that, maybe just heat it up to 650-ish degrees and dunk it in water?
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Don Doerfler
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PostSubject: Re: 4140 armor   Mon Jan 30, 2012 8:13 pm

its the front wedges on 15lb bot
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MikeNCR
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PostSubject: Re: 4140 armor   Mon Jan 30, 2012 9:45 pm

I take most of my stuff to 45hrc, but at that point it's more personal preference. Seems to be a nice balance between not bending easily and not snapping too quickly.
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Koolaid64
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PostSubject: Re: 4140 armor   Mon Jan 30, 2012 9:52 pm

1450-1500, quench, bake at 500 for an hour, and your cookies are done

40-45hrc
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Camden W
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PostSubject: Re: 4140 armor   Tue Jan 31, 2012 5:22 pm

Is this AL? I thought it melted at about 800 deg. F?
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MikeNCR
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PostSubject: Re: 4140 armor   Tue Jan 31, 2012 5:41 pm

Camden W wrote:
Is this AL? I thought it melted at about 800 deg. F?

4140 is a grade of steel:
http://www.efunda.com/materials/alloys/alloy_steels/show_alloy.cfm?ID=AISI_4140&prop=all&Page_Title=AISI%204140
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Koolaid64
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PostSubject: Re: 4140 armor   Tue Jan 31, 2012 6:16 pm

aluminum's melting point is around 1150-1200
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