Siffofin:
1.Low carbon karfe tubingtare da sumulKarfe ne na carbon tare da abun ciki na carbon kasa da 0.25%. Ana kuma kiransa ƙarfe mai laushi saboda ƙarancin ƙarfinsa, ƙarancin taurinsa da laushinsa.
2. Tsarin annealed na ƙananan ƙarfe na carbon karfe tare da maras kyau shine ferrite da ƙananan pearlite, wanda ke da ƙananan ƙarfi da taurin, kuma mai kyau filastik da taurin.
3. Low carbon karfe tubing tare da m yana da kyau sanyi formability kuma zai iya zama sanyi kafa ta crimping, lankwasawa, stamping, da dai sauransu.
4. Low carbon karfe tubing tare da sumul yana da kyau weldability. Sauƙi don karɓar nau'ikan sarrafawa iri-iri kamar ƙirƙira, walda da yanke.

Maganin zafi:
Low carbon karfe tubing tare da sumul yana da babban hali ga tsufa, duka quenching da tsufa halaye, kazalika da nakasawa da kuma tsufa halaye. Lokacin da aka sanyaya karfe daga babban zafin jiki, carbon da nitrogen a cikin ferrite suna da yawa, kuma carbon da nitrogen da ke cikin baƙin ƙarfe za a iya samuwa a hankali a yanayin zafi na al'ada, ta yadda ƙarfin da taurin karfe ya inganta, da ductility. kuma an saukar da tauri. Ana kiran wannan lamarin quenching tsufa. Low carbon karfe tubing tare da sumul zai yi wani tsufa sakamako ko da ba a kashe. Lalacewar ƙananan bututun ƙarfe na carbon tare da maras kyau yana haifar da adadi mai yawa. Carbon da nitrogen atom ɗin da ke cikin ferrite suna hulɗa da ƙarfi tare da rarrabuwa, kuma carbon da nitrogen atoms suna taruwa a kusa da layin karkatarwa. Wannan hadewar carbon da nitrogen atoms da layukan karkatarwa ana kiranta da Cochrane gas mass (Kelly gas mass). Yana ƙara ƙarfi da taurin ƙarfe kuma yana rage ductility da tauri. Wannan al'amari shi ake kira deformation tsufa. Lalacewar tsufa ya fi cutarwa ga ductility da taurin ƙarancin ƙarfe na carbon fiye da kashe tsufa. Akwai bayyananniyar maki na sama da ƙasa na yawan amfanin ƙasa akan madaidaicin madaidaicin ƙarancin ƙarfe na carbon. Daga babban abin da ake samun amfanin gona har zuwa ƙarshen haɓakar yawan amfanin ƙasa, ƙungiyar ƙwanƙwasa da aka kafa akan saman samfurin saboda rashin daidaituwar nakasar ana kiranta bel Rydes. Yawancin sassa na hatimi galibi ana goge su. Akwai hanyoyi guda biyu don hana shi. Hanya mai girma da aka riga aka tsara, ana sanya karfen da aka rigaya ya kasance na wani lokaci kuma ana samar da bel na Rudes lokacin da aka yi tambarin, don haka bai kamata a sanya karfen da aka rigaya ya daɗe ba kafin a buga shi. Dayan kuma shine a kara aluminium ko titanium a cikin karfe don samar da barga mai ƙarfi tare da nitrogen don hana tsufa lalacewa ta hanyar samuwar iska ta Kodak.