HEAT EXCHANGER MANUFACTURING

Date 03-01-2008 19:09

Application : Manufacturing of stainless steel heat exchanger.

In service equipment temperature range from 200F to 800F, with hot spot up to 1400F.

Until now we have been using stainless steel 304L.

In service problem have been very seldom.

Because of the price of 304L stainless steel we are now looking to replace it with a less expensive stainless.

We are looking at Allegheny Ludlum AL409HP, AL439HP and AL201LHP.

We know that competitors have used 409 and faced major corrosion problem, especially in the weld heat affected zone.

We wonder if AL409HP may solve the problem of weld heat affected zone corrosion.

We also wonder if 885F embrittlement may become a problem with AL439HP.

Thank you for helping me on that.

Yvan Lessard

By G.S.Crisi (****)

Date 03-02-2008 19:34

If I were you, I'd ask Allegheny Ludlum for recommendation. They're the manufacturers and know their material better that anybody else.
Giovanni S. Crisi
Sao Paulo - Brazil

By YVAN

Date 03-02-2008 23:15

I've asked Allegheny but till now have not get much from them. May be I've not talked to the right people yet. I'll try again. Thanks for your suggestion.

Yvan Lessard
Montréal, Canada

By Joseph P. Kane (****)

Date 03-03-2008 01:02

I'll bet thet "Hot Spots up to 1400 degrees" is one reason that A. L. is hesitant to reply.

By G.S.Crisi (****)

Date 03-03-2008 19:17

Yvan,
don't send e-mails. In my experience, in these cases they're seldom, if ever, answered.
Give them a telephone call. Be prepared to slip over three or four persons before getting in touch with the right one.
Giovanni S. Crisi

By YVAN

Date 03-03-2008 20:48

I'll try again.
Thank you