| http://www.w3.org/ns/prov#value | - Specific examples of suitable base materials include polycrystalline M-50 steel, SKH4A bearing material, carburizing grades AISI 4118, AISI 8620, AISI 9310 and similar grades, hardened bearing steel such as AISI 52100 and AISI 440C stainless steel and silicon nitride ceramics.
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