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Old 02-06-2012, 18:53   #1
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Type of Mild Steel plate for hull

Hi All. I have to weld in a patch to the hull of my steel ketch. Is there a preferred type of steel plate to use? It will be painted inside and out but was wondering if the original plate and new plate are different steels will it matter?
Thanks in advance. Coachbolt.
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Old 02-06-2012, 19:32   #2
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Re: Type of Mild Steel plate for hull

A36 will do, or any steel with around 0.2% of carbon.
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Old 02-06-2012, 20:00   #3
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Re: Type of Mild Steel plate for hull

As long as your plate is not Corten, you should be able to use most any mild steel plate, as dpons said A36 is pretty easy to find and will weld well if prepared properly. When I bilt my Colvin I used Corten and the one time I had to patch a removed thru hull hole i could not find any we were in the Pillapeens at the time LOL waited 3 months with a wood plug in the hole ! LOL but it's still sailin after 40 + years LOL
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Old 03-06-2012, 06:15   #4
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Thank you for that information. I was a bit concerned. Much appreciated.
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Old 03-06-2012, 09:39   #5
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Re: Type of Mild Steel plate for hull

Commonly it's just called cold rolled steel. Likely if you asked for A36, they would not know what you're talking about. If it is dissimilar metals you're concerned about, don't worry. Most steel frames are hot rolled and slightly different with no problems. I have even welded stainless to steel on the deck with no issues.
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