wear and heat resistance

[andysf]

Are there any materials anyone could recommend for being at service a maximum of 500°C.
The part in question will be in contact with other cast parts and so would require some form of wear resistance.
Would an as-cast 309C40 25/12 material be ideal in such situations?

 

[metengr]

andysf;
What kind of wear are you anticipating - sliding or contact between faying surfaces?

 

[arunmrao]

I have seen some HH or HK grade castings hard faced .

 

[andysf]

Metengr I have been led to believe that an indent of a drag chain may previously have been left when this part (a roller) was issued by a previous supplier.
Arunmrao I don't really want to be having to hard face these items.

 

[arunmrao]

Are you looking at clinker being transported . What part are you concerned, the drag chain or the rollers? Both,are not ideal for hard facing.

 

[andysf]

Just the rollers for now, and yes I believe your summation is correct with regards to transportation of clinker

 

[arunmrao]

HK40, will be better suited,though I have no direct experience for the rollers.I hope there will be better suggestions coming in soon from other knowledgeable members.

Let us know finally your choice.

 

[andysf]

Thanks kindly I'll have a look into that and I'll be sure to let you know

 

[mahadhatu]

I am assuming this a furnace fixture handling parts being heat treated? 500C is would be a low temperature tempering furnace. What is the current material being used in the service. Are you trying to replace the existing material or is this a new design?

As a general note - ASTM A297 HK in the as cast condition will be hold at the temperatures you are looking for as well as handle the wear due to rollers etc.

Let us know what you picked.

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There is always some thing better out there...
Mahadhatu

 

[arunmrao]

Andysf

I shall provide you contact details of a good friend of mine. He has long years of experience in developing heat resistant alloys and parts. He has written a book too ""Heat Resistant Alloys" by James Kelly mail id is jkellymetal@gmail.com. Hope you will find a better solution from him.

 

[andysf]

Thanks kindly Arunmrao. That may well come in very handy. I think the customer has been given the option of a French spec Z80CM or something that was very similar to their original spec, but with slightly higher nickel (maybe this is what the original supplier was aiming for).