The LRT455020 is an IKO inner ring in the Inner Rings series. It is listed as a metric, general-usage inner ring designed to assemble with RNAF506220, and it is categorized under Brand > IKO > Inner Rings.
The supplied product data identifies the bearing material as High Carbon Chrome Steel, while the title information describes the inner ring as High Carbon Steel. The listed assembled bearing is RNAF 506220. Material descriptions should be interpreted according to the supplied product record.