Kulephera kuvala zowonjezera za Play kuli kofunika. Nthawi zambiri, anthu ambiri amaganiza kuti chimakhala chovuta kwambiri, choterocho chimakhala cholengeza kuti matumbo awo amakhala ndi chromium, ndalama zimafika 30%. Komabe, zomwe zimamwa zogawidwazi, kuthekera kwakukulu kwa mabowo a micro-micro ku mawonekedwe pakati pa matrix ndi ma carbides, ndipo kuthekera kwa kusokonekeranso kudzakhala kwakukulu. Ndipo zovutirapo chinthucho, zovuta kuti zidulidwe. Chifukwa chake, kupanga chovala chovunda komanso cholimba chopukutira sikophweka. Kukupera mphete makamaka pogwiritsa ntchito mitundu iwiri ya zinthu.
65mm (65 Manganese): Izi zitha kusintha chikhazikitso cha mphete yogaya. Lili ndi machitidwe ovutikira kwambiri, kuvala bwino kwambiri ndi maginito othandizira kukana, imagwiritsidwa ntchito makamaka pokonza ufa pomwe malonda amafunika kuchotsa chitsulo. Kuwonongeka kukana ndi kulimba mtima kumatha kusintha kwambiri posintha ndi kusanza kutentha.
A Mn13 (13 Manganese): Kukhazikika kwa mphete yopukutira ndi MN13 idakonzedwa bwino poyerekeza ndi 65n. Kutulutsa kwa chinthu ichi kumathandizidwa ndi kuthira madzi mutathira, zotupa zimakhala ndi mphamvu zapamwamba, kuuma ndi maginito ndi osakhala ndi maginito okhwima madzi, ndikupanga kupera mphete yolimba. Mukakumana ndi zovuta kwambiri komanso kusintha kwakukulu pakuthamanga, komwe kumachitika kumayesedwa ndikupanga marnens, popanga mawonekedwe apamwamba kwambiri, ngakhale atavala zowonda kwambiri, kudzikuza kumatha kupindulitsa katundu wambiri.