EndurAlon™(Alonizing™) Process FAQS
Is the EndurAlon™(Alonizing™) process Alonizing?
EndurAlon (Alonizing) and Alonizing are both trademarks of Endurance Technologies Inc. The rights to the alonizing process were purchased by Endurance Technologies from the developer and refined through a significant investment in research and development. This ensured that customer requirements were consistently exceeded and that any previous product performance issues were addressed.
What type of coating is EndurAlon™(Alonizing™)?
EndurAlon (Alonizing) is not a coating it is a change in the surface chemistry of a specified substrate material. It provides a uniform controlled alloyed case depth across the surface of the designated area to be EndurAlized (Alonized) hence the designation “Surface engineering.” The alloyed surface has no discernable interface, no line of delineation and it will not break off as in the case of other coatings also no growth to the piece can be attributed to the alloyed case depth. The alloyed case depth provides an aluminum rich iron aluminide surface.
What diffusion zone or case depth thickness is provided by the EndurAlon™(Alonizing™)?
Case depth thickness is a function of substrate material chemistry, furnace residence time at activation temperature, type of activator and retort pressure. Rule of thumb for stainless steels is 0.003” to 0.005”, carbon steel is 0.007” to 0.015” and for high alloy steels 0.003” to 0.006”. It should be noted that case depth should not be considered the primary critical factor. The critical factor is the aluminum percent in the aluminum rich zone. Customer specified case depth can be met but it is governed by the substrate chemistry.
In the case of tubing can only the inside diameter of the tube be processed?
Tubes can be processed only on the I.D. and only on the O.D. or on both the I.D. and O.D. Whatever is specified by the customer.
Can EndurAlized™ tubes be rolled into the tubesheet?
Yes, tubes can be rolled into the tubesheet after EndurAlizing. The alloyed surface is not appreciably harder than the base material and the ductility of the substrate material is maintained. Endurance technologies will provide guidelines for rolling tubes in the event of an order and upon the customer request.
Can Tubes be welded to the tubesheet after EndurAlizing™?
Yes, but care has to be taken to prevent the aluminum from cracking the weld. Endurance technologies will provide guidelines for tube to tubesheet welding in the event of an order and upon the customer request
What length of tube can be processed?
50 feet long.
What is the largest part than can be processed?
Largest diameter 8 ft. Pipe spools with 8ft legs an up to 40 ft long and 18 inch dia. can be processed.
What is the maximum operating temperature of the alloy case depth?
Maximum continuous operating temperature is governed by the substrate material. Endurance Technologies does not recommend increasing the operating temperature over the ASTM specifications for the substrate material.
Can the EndurAlizing™ surface be repaired in-situ if it is accidentally damaged?
It can be repaired in-situ using Endurance Technologies aluminum thermal spray process (Aluminizing). Aluminizing is inferior to EndurAlizing which can only be performed in our facilities.