Bututun ƙarfe mai lamba 20# yawanci yana amfani da ƙarfe mai lamba 20# mai inganci a matsayin kayan aiki, wanda bututun ƙarfe ne mai inganci wanda ke jure zafi na carbon wanda aka saba amfani da shi a gine-gine da gine-ginen injiniya.

Karfe 20# yana da halaye kamar haka: kyakkyawan ƙarfin lantarki da kuma ƙarfin walda. Saboda ƙarancin ƙarfinsa, ya dace da sarrafa sanyi da kuma yanayin da ba shi da ƙarfi sosai.

Ana iya amfani da bututun ƙarfe mai nauyin 20# a cikin waɗannan masana'antu:

1. Ga bututun tukunyar jirgi mai matsa lamba ƙasa da matsakaici, ma'aunin aiwatarwa shineGB 3087, ana amfani da shi don ƙera bututun zafi mai zafi da bututun bango masu sanyaya ruwa na tukunyar ruwa mai matsakaicin matsin lamba da ƙarancin matsi (matsin aiki ≤5.9 MPa), waɗanda ke cikin yanayin zafi mai yawa (≤480℃) + yanayin iskar shaka na tururin ruwa na dogon lokaci.

2. Bututun mai da ke karya bututun mai, tsarin aiwatarwa shineGB 9948, ana amfani da shi don reactor, masu musayar zafi, da sauransu na na'urorin tace mai, waɗanda ke hulɗa da kafofin watsa labarai na acidic (H₂S, CO₂) da matsin lamba mai yawa (har zuwa 15 MPa)

3. Kayan aikin taki mai matsin lamba mai yawa, ma'aunin aiwatarwa shineGB 6479, ana amfani da shi don kayan aikin taki masu matsin lamba (10 ~ 32 MPa) kamar ammonia da urea na roba, waɗanda ke shafar hanyoyin da ke lalata iska (kamar ammonia mai ruwa, narkewar urea)

Bututun ƙarfe masu zafi marasa tsari don tallafin hydraulic, ma'aunin aiwatarwa shineGB/T17396, ana amfani da shi don ginshiƙan tallafi na hydraulic da jacks a cikin ma'adinan kwal, kuma yana jure wa manyan lodi masu canzawa (50 ~ 100 MPa) da girgizar tasiri