Qalabka 'astret' steel astm a333 fasalka 3, fasalka 6, fasalka 8, fasalka 9aad
Qulqulka qabow iyo noocyada tuubbada qabow ee la duubay ayaa la heli karaa. Waxaa jira tuubooyin aan kala go 'lahayn, tuubooyin qudhun leh, tuubooyin eryayaal iyo tuubooyin been abuur ah. Tuub fadhiga ah waxaa laga sameeyay hal shey oo shay ah, halka ASTM A333 Fasalka 6 Sharaxaadda Luuqadaha Waalidka loo baahan yahay
Hadal adag oo hadal ah, bir kasta waa allen, laakiin ma aha in dhammaan strals loo yaqaan "strals-ka 'alloy stels'. Stors-yada ugu fudud waa macdanta birta (fe) oo ay ku xardhan yihiin kaarboon (c) (qiyaastii 0.1% ilaa 1%, iyadoo ku xidhan nooca) iyo wax kale oo aan ahayn kala-baxa si aan loo eegin); Kuwan waxaa loo yaqaannaa sterobon steron. Si kastaba ha noqotee, ereyga "aloy bir" waa ereyga caadiga ah ee tixraacaya stepls oo leh waxyaabo kale oo ah waxyaabaha kale ee ku daraya si ula kac ah ugamantaan kaarboon. Aloydiinta caanka ah waxaa ka mid ah manganese (midka ugu caansan), nikkel, chromium, molybdenum, Silicon, Silon, iyo Boron. Less common alloyants include aluminium, cobalt, copper, cerium, niobium, titanium, tungsten, tin, zinc, lead, and zirconium.
ASTM A320 faahfaahinta Fasalka L7 ee L7 waxay daboolaysaa bir bir-qabad oo bir ah oo loogu talagalay adeegga heerkulka hoose. Daboolkan caadiga ah ee la duubay, been abuur ah, ama noocyo cagaaran, boorsooyin, boolal, iyo bogaqno istcimaal ah oo loo isticmaalo maraakiibta cadaadiska, tuubbooyinka, iyo qalabka.