Material for Roll-In Furnace Cart 3

[nilcram]

I am in the process of installing a used, walk-in tempering furnace, and I need to design/build a new, roll-in cart for this furnace. The furnace will be operated at 800 F temperature, but it is rated for 1200 F. The current furnace cart is in rough shape, and it is not strong enough to handle the 10,000 Lbs. max load I need to put on it. Current cart is approx. 4' wide by 6' long, with four cast iron casters.

I know that Stainless is fairly common in the construction of furnace carts and components, but is it necessary to use Stainless when temperatures will not exceed 1200 F. ?

I would like to use economical materials (A36,4130, etc), but I need something that can handle the 10K Lb. load at 1200 F. High temperature creep and strength are critical.

What are some ideas for construction materials.
Thanks,

NILCRAM

 

[EdStainless]

Don't use a stainless. They are not very strong and in general they don't like being cycled in you temp range.

You could use 4130, but it might work out better to use a hot work (H) tool steel.
Thought, if the weight of the cart isn't a big concern, could you use cast parts to build it? There are case CrMoV grades that would take cycling to these temps all day.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection

http://www.trent-tube.com/contact/Tech_Assist.cfm

 

[BillPSU]

There are several intermetalics which people have used in furnace applications usually at higher temperatures though. Iron aluminide or nickel aluminide. I have not actually use these materials but I have read about their application. These materials actually get stronger above room temperature till the critical temp. They are highly resistant to corrosion also.

 

[arunmrao]

Castings to grade ASTM A297 Grade HH will be a good performer. No scaling.buckling will withstand frequent thermal shocks.

Castiron casters are the chepest and if downtime for replacement is not a concern,continue with it.