Type of Steel Needed for Design?
Type of Steel Needed for Design?
(OP)
I am designing an overflow tub for an aluminum melter. It has a fairly high capacity of volume at about 7000 lbs. Currently we use a cast steel structure. We are unable to repair these after some use tho because of the thermal fractures.
Hence I am making a welded contstruction design, but I have not found an answer as to what type of steel to use for this? It will be subjected to molten aluminum of about 1500F. Any help would be great.
Hence I am making a welded contstruction design, but I have not found an answer as to what type of steel to use for this? It will be subjected to molten aluminum of about 1500F. Any help would be great.





RE: Type of Steel Needed for Design?
The two pots that I've seen in similar operations were cast iron and as you say were not easily repairable. These pots didn't run much over 1250F. Cast steel should be more easily repaired than CI but not impossible .
RE: Type of Steel Needed for Design?
RE: Type of Steel Needed for Design?
RE: Type of Steel Needed for Design?
RE: Type of Steel Needed for Design?
So, with that in mind (dumb as it may be :), what sort of steel do you recommend?
RE: Type of Steel Needed for Design?
The steel grades I recall is plain carbon steel,with little Ni and Mo(less than 1%)
Chocolates,men,coffee: are somethings liked better rich!!
(noticed in a coffee shop)
RE: Type of Steel Needed for Design?
I did some checking on this and the problem you are going to have with this current set-up is wastage (dissolution) of the steel or stainless steel (iron will dissolve in molten aluminum) with exposure to molten aluminum for any appreciable length of time.
I would suggest if you intend to fabricate the tub, I would use 2.25% Cr-1% Mo steel plate (A 387 Grade 22) which is suited for elevated temperature service. The material is readily weldable and easy to fabricate into a tub geometry.
Now, what I would suggest is to line this tub with a suitable refractory to protect the steel from dissolution with molten aluminum at 1250 deg F or higher. This will also keep the aluminum relatively clean - no iron contamination.
RE: Type of Steel Needed for Design?
Chocolates,men,coffee: are somethings liked better rich!!
(noticed in a coffee shop)
RE: Type of Steel Needed for Design?
= = = = = = = = = = = = = = = = = = = =
Plymouth Tube
RE: Type of Steel Needed for Design?
Refractory must, of course, be periodically inspected and replaced
Cast iron with refractory lining is tough to beat..
-MJC