1. Ra'ayi
Kullin hexagon na waje kayan haɗi ne na ƙarfe, wanda kuma aka sani da sukurin hexagon na waje, sukurin hexagon na waje ko ƙullin hexagon na waje.

2. Maganin saman
A tsarin kera ƙulli, gyaran saman yana ɗaya daga cikin hanyoyin haɗin gwiwa masu mahimmanci. Yana iya sa saman ƙulli ya cika wasu buƙatu kuma ya inganta juriyarsa ga tsatsa, ƙarfi da kyawunsa.
Akwai nau'ikan hanyoyin magance ƙusoshi da yawa, waɗanda aka fi sani da su kamar haka:
Galvanizing: Ana nutsar da ƙusoshin a cikin maganin zinc, kuma ana shafa zinc a saman ƙusoshin ta hanyar amfani da electrochemical reaction, wanda hakan ke sa su zama masu juriya ga tsatsa da kuma juriya ga tsatsa.
Yin amfani da galvanizing mai zafi: Bayan an ƙera ƙusoshin, ana nutsar da su cikin ruwan zinc mai narkewa, kuma ana samar da wani Layer na zinc a saman ta hanyar sinadarai don cimma tasirin hana tsatsa, juriya ga tsatsa da sauran tasirin.
Maganin duhu: Ana samar da fim ɗin baƙin ƙarfe mai ɗauke da sinadarin oxide a saman ƙugiyar ta hanyar sinadaran da ke cikinta don inganta juriyarsa ga tsatsa.
Maganin Phosphating: A jiƙa ƙullin a cikin maganin phosphating don samar da fim ɗin phosphating a saman don inganta juriyarsa ga tsatsa.
Maganin taurarewa: Ta hanyar maganin zafi ko feshi a saman, ana samar da wani Layer na rufi mai ƙarfi a saman ƙulle don inganta ƙarfinsa da juriyarsa ga lalacewa.
Waɗannan hanyoyin magance matsalar su ne hanyoyin magance matsalar a saman ƙugiya. Hanyoyi daban-daban na magance matsalar sun dace da yanayi da buƙatu daban-daban na aikace-aikace. Lokacin yin maganin matsalar a saman ƙugiya, dole ne a yi shi daidai da ƙa'idodi da ƙa'idodi masu dacewa don tabbatar da cewa ƙugiya da aka yi wa magani sun cika buƙatun aiki masu dacewa.

3. Aikin matakin
Lakabin matakin aiki na ƙullin hexagon na waje ya ƙunshi sassa biyu na lambobi, waɗanda bi da bi ke wakiltar ƙimar ƙarfin tensile mara suna da kuma rabon ƙarfin amfani na kayan ƙullin.
Misali, ƙulli mai matakin aiki 4.6 yana nufin:
a. Ƙarfin da aka ƙayyade na kayan ƙulli ya kai 400MPa;
b. Rabon ƙarfin amfani da kayan ƙulli shine 0.6;
c. Ƙarfin yawan amfanin ƙasa na kayan ƙulli ya kai matakin 400 × 0.6 = 240MPa
Matakan aiki masu ƙarfi 10.9, bayan maganin zafi, na iya cimmawa:
a. Ƙarfin da aka ƙayyade na kayan ƙulli ya kai 1000MPa;
b. Ƙarfin yawan amfanin da aka samu na kayan ƙulli ya kai 1000 × 0.9 = 900MPa.

4. Bambanci tsakanin ƙusoshin hexagon na waje na yau da kullun da ƙusoshin hexagon na waje masu ƙarfi
Ana iya sake amfani da ƙusoshin hexagonal na yau da kullun, amma ba za a iya sake amfani da ƙusoshin masu ƙarfi ba.
Ana yin ƙusoshin masu ƙarfi sosai da ƙarfe mai ƙarfi mai lamba 45 (8.8s), 20MmTiB (10.9S), kuma ƙusoshin masu matsin lamba ne. Don nau'ikan gogayya, yi amfani da makulli mai ƙarfin juyi don amfani da makullin da aka ƙayyade, kuma don nau'ikan masu ɗaukar matsi, buɗe kan torx. Kusoshin talakawa gabaɗaya ana yin su ne da ƙarfe na yau da kullun (Q235) kuma suna buƙatar a ƙara musu ƙarfi kawai.
Kullin yau da kullun gabaɗaya suna da maki 4.4, maki 4.8, maki 5.6 da maki 8.8. Kullin masu ƙarfi gabaɗaya suna da maki 8.8 da maki 10.9, inda aka fi samun maki 10.9.
Ramin ƙulli na ƙulli na yau da kullun ba lallai bane ya fi na ƙulli masu ƙarfi girma. A gaskiya ma, ramukan ƙulli na yau da kullun ƙanana ne.