both the reinforced scraper blade kit and aftermarket wear edges can use ar400 steel for the backing plate, but it's not a universal guarantee for all aftermarket options.. like some aftermarket wear edges are designed to bolt directly onto the existing moldboard while reinforced kits might involve a more substantial modification or replacement of the blade assembly..
Most guys rave about AR400 like it's some magic fix, but honestly, it's overrated for scraper blades. A good aftermarket edge with proper hardfacing often outlasts stock AR400, yet people keep paying extra for the brand name without real-world gains