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254 SMO Vs 4565

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fpm

Mechanical
Jul 18, 2005
25
Hi all,
My company produces a product, parts of which are made from 254 SMO rather than 316, when extra high corrosion resistance is required.

We are experiencing periodic difficulties in getting our hands on 254SMO plate, and I want to investigate the potential to use another material. I've seen comment on 4565 comparing favourable to 254SMO, but I have no experience of it.

The chosen material must have similar physical props to SMO, and must also behave similarly in manufacturing; wleding, forming etc.

Any pointers would be gratefully received!
Regards,
FP
 
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4565 is better from a corrosion point of view. It replaces 1.5% of moly with 0.2% more of nitrogen and has higher chromium This raises yield strength slightly and permits slightly lower nickel. You also get lower sigma tendency.

This is simply smarter alloy design and worth the switch.

Michael McGuire
 
Mc, I agree. 4565 is a smarter alloy. The improved phase stability is what I really like. It does not do as well as the 6%Mo grades at low pH, but other than that it has very good corrosion resistance.
You can also get the material from numerous sources.

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Rust never sleeps
Neither should your protection
 
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