Ubwoko bwa 440 Ibyuma bitagira umuyonga, bizwi nka "icyuma cyogosha," nicyuma gikomeye cya karuboni ya chromium. Iyo ushyizwe munsi yubushyuhe bugera kurwego rwo hejuru rwicyiciro icyo aricyo cyose cyicyuma. Andika 440 Ibyuma bitagira umuyonga, biza mu byiciro bine bitandukanye, 440A, 440B, 440C, 440F, bitanga imbaraga zo kurwanya ruswa hamwe no kurwanya abrasion. Ibyiciro byose birashobora gutunganywa muburyo bworoshye, biranatanga imbaraga zo kurwanya aside yoroheje, alkalis, ibiryo, amazi meza, numwuka. Ubwoko 440 burashobora gukomera kuri Rockwell 58 harness.
Turashimira buri cyiciro imitungo idasanzwe, ibyiciro byose byubwoko bwa 440 Ibyuma birashobora kuboneka mubicuruzwa byinshi bitandukanye birimo:
- Pivot
- Ibikoresho by'amenyo no kubaga
- Icyuma cyiza cyane
- Intebe
- Nozzles
- Amapompe y'amavuta
- Kuzunguruka ibintu
Buri cyiciro cyubwoko 440 Ibyuma bitagira umuyonga bigizwe nimiterere yihariye yimiti. Twabibutsa ko itandukaniro rikomeye hagati y amanota ari urwego rwa Carbone
Andika 440A
- Cr 16-18%
- Mn 1%
- Si 1%
- Mo 0,75%
- P 0.04%
- S 0.03%
- C 0,6-0,75%
Andika 440B
- C 0,75-0.95%
Andika 440C na 440F
- C 0,95-1.20%
Igihe cyo kohereza: Ukwakira-09-2020