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Up Topic Welding Industry / Technical Discussions / Cutting of 9 Chrome base metal
- - By Hojo (*) Date 09-22-2008 15:31
I have been told that Oxy-Fuel cutting will not work with P-91 plate and we must use Plasma. Is this true?
Parent - By 3.2 Inspector (***) Date 09-22-2008 18:07
No.

3.2
Parent - - By G.S.Crisi (****) Date 09-22-2008 23:28
Actually, you'll find some difficulty when trying to cut 9% chrome steel with oxyfuel. This is because the chrome oxyde formed has a higher melting point than iron oxyde. Remember that oxyfuel cutting is based on the formation of iron oxyde, that has a lower melting point than iron. So, the oxyde melts down, and you see it as big red drops falling from the metal, while iron remains solid.
Now, as 3.2 says, you can still cut it with oxyfuel, provided you take the necessary precautions.
Giovanni S. Crisi
Sao Paulo - Brazil
Parent - By 3.2 Inspector (***) Date 09-23-2008 08:58
I agree, but it is possible.
And as always, some care should be taken when heating(and consequently cooling) P91 material.

3.2
Up Topic Welding Industry / Technical Discussions / Cutting of 9 Chrome base metal

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