400 Urukurikirane-Ferritic na Martensitike Ibyuma
Andika 408-Kurwanya ubushyuhe bwiza, kurwanya ruswa, 11% Cr, 8% Ni.
Ubwoko 409-ubwoko buhendutse cyane (Abongereza-Abanyamerika), busanzwe bukoreshwa nkumuyoboro usohora imodoka, nicyuma cya ferritic kitagira ibyuma (ibyuma bya chrome).
Andika 410-Martensite (ibyuma bikomeye bya chromium), kwihanganira kwambara neza no kurwanya ruswa.
Andika 416-Wongeyeho sulfure itezimbere ubushobozi bwo gutunganya amakuru.
Andika 420- “blade grade” ibyuma bya martensitike, bisa nicyuma cyambere kitagira umuyonga cya Brinell ibyuma bya chromium ndende. Ikoreshwa kandi mubyuma byo kubaga, birashobora kuba byiza cyane.
Andika 430-ferritic idafite ibyuma, kugirango ushushanye, nkibikoresho byimodoka. Impinduka zidasanzwe, ariko kurwanya ubushyuhe buke no kurwanya ruswa.
Andika 440-ifite imbaraga-zo gukata ibikoresho byuma, birimo karubone irenze gato, irashobora kubona umusaruro mwinshi nyuma yo kuvura neza ubushyuhe, kandi ubukana bushobora kugera kuri 58HRC, ishyirwa mubyuma nkibyuma bidafite ingese. Ikoreshwa cyane ni, kurugero, "urwembe". Hariho ubwoko butatu busanzwe: 440A, 440B, 440C, na 440F (byoroshye gutunganya).
Igihe cyoherejwe: Mutarama-19-2020