ASTM A 53 yana rufe bututun ƙarfe maras sumul da welded tare da kaurin bango mara ƙima.Yanayin saman yawanci baƙar fata ne kuma bututun ASTM A53 (wanda kuma ake kira ASME SA53 bututu) an yi shi ne don aikace-aikacen injina da matsa lamba kuma ana karɓa don amfanin yau da kullun a cikin tururi, ruwa, iskar gas da layin iska.Ya dace da waldi da kuma samar da ayyukan da suka shafi coiling, lankwasawa, da flanging.A53 maras nauyi bututu abu ne na bututun ƙarfe na Amurka.Babban tsarin samar da bututun ƙarfe na A53 ya kasu zuwa zane mai sanyi da mirgina mai zafi.Babban bambancin da ke tsakanin su biyun shi ne yadda tsarin samar da bututun da ba su da kyau a cikin sanyi ya fi na zafi birgima, kuma bayyanar bututun da ba shi da sanyin sanyi ya fi na nadi mai zafi.Birgima karfe bututu maras kyau, kauri bango na sanyi-birgima sumul carbon karfe bututu ne gaba ɗaya karami fiye da na zafi-birgima sumul carbon karfe bututu, amma saman ya dubi haske.The surface na zafi-birgima carbon karfe bututu ne in mun gwada da m.Babban tsarin samar da zagaye bututu blank → dumama → huda → skew rolling uku, ci gaba da juyawa ko extrusion → cirewar tube → girman (ko rage diamita) → sanyaya → daidaitawa → gwajin na'ura mai aiki da karfin ruwa (ko gano kuskure) → alama → ɗakin karatu na sakawa.
| ASTM A53/ASME SA53 | Nau'in S | Nau'in E | Nau'in F | |||
| (mara kyau) | (lantarki-juriya walda) | (bututu mai welded tanderu) | ||||
| Darasi A | Darasi B | Darasi A | Darasi B | Darasi A | ||
| Carbon max.% | 0.25 | 0.30* | 0.25 | 0.30* | 0.3 | |
| Manganese % | 0.95 | 1.2 | 0.95 | 1.2 | 1.2 | |
| Phosphorus, max.% | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | |
| Sulfur, max.% | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | |
| Copper, max.% | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | |
| Nickel, max.% | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | |
| Chromium, max.% | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | |
| Molybdenum, max.% | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | |
| Vanadium, max.% | 0.08 | 0.08 | 0.08 | 0.08 | ||
| * Ga kowane raguwa da ke ƙasa da 0.01% ƙasa da ƙayyadadden ƙimar carbon, haɓakar 0.06% manganese sama da iyakar ƙayyadaddun za a ba da izini har zuwa matsakaicin 1.65% (ba ya shafi SA53). | ||||||
| Bukatun tensile | Mara sumul da Electric-resistance-welded | Ci gaba-Welded | |
| Darasi A | Darasi B | ||
| Ƙarfin Jiki, min., psi | 48,000 | 60,000 | 45,000 |
| Ƙarfin Haɓaka, min., psi | 30,000 | 35,000 | 25,000 |
1. Babban tsarin samar da bututun ƙarfe mara nauyi mai zafi (tsarin dubawa):
Tube blank Shirye-shiryen da dubawa → tube blank dumama → huda → tube rolling → karfe reheating → gyarawa (rage) diamita → zafi magani △ → kammala bututu → gamawa → dubawa (ba lalacewa, jiki da sinadarai, Taiwan dubawa) → warehousing
2. Babban tsarin samarwa na bututun ƙarfe mara nauyi (wanda aka zana) mai sanyi:
Shirye-shiryen billet →mai shafa mai → sanyin birgima (zane) →maganin zafi → mikewa → gamawa → dubawa
