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SS as wear-resistant lining

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odie5070

Mechanical
Jun 14, 2001
5
US
I have a customer that hauls light weight aggregate materials to construction sites across the midwest. This aggregate develops a Ph of 14+ when wet. We would normally use Hardox from SSAB to line haulers. I do not believe that Hardox will stand up to the Ph levels. He asked me if building a SS tilt bed would alleviate his problem. I know that SS will not wear like a traditional wear resistant material. A complete SS bed is roughly $80K for this type hauler. I have 3-possible solutions as I see them:

1--SS bed (I am not sure which type to use)
2--SS or Aluminum lining with Teflon/Kynar/Halar coating on contact surfaces.
3--Teflon coated wear plate.

I was wondering if anyone in this forum might be able to offer suggestions or expertise to this problem.

Regards Timothy C. Odom, CEO
Odom Industries, LLC
Phone: 513-777-3773
Fax: 513-777-7223
 
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You can use 410 grade of staunless steel,which has good wear resistance compared to 304.
 
arunmrao

Thank you for the response...I have used 410 for wear plate in controlled environments with excellent results. My concern with SA240-410 in this application is the high carbon content in reaction to the PH and corrosion from oxidation. Can you lend any advice regarding my concerns over 410?

Regards, Timothy C. Odom, CEO
Odom Industries, LLC
Phone: 513-777-3773
Fax: 513-777-7223
 
The weldable 12 Cr stainless steels - e.g., Armco 409Ni or Cromweld 3Cr12 - will provide excellent performance and also easy fabricability. The high pH conditions (and even lower pHs from washing) will provide no corrosion problems with this material and without iron oxide corrosion product to abrade off, the wet corrosion/wear rates will be very low. You can get actual or comparative corrosion rate data form these alloy sources.

Another choice would be duplex stainless steel (DSS), especially the least expensive grade 2304. DSS alloys are more costly than the 12Cr SSs and about the same cost as 304 per pound. 2304 has higher strength than 304, so it is less costly for equivalent strength. Weldability at less than 0.5 in. is essentially the same as 304, but with a different filler metal.
 
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