ASTM A252 misali ne na musamman da aka haɓaka don amfani da bututun bututun ƙarfe na bututu.
ASTM A252 ya shafi tarin bututun da karfen Silinda ke aiki a matsayin memba mai ɗaukar kaya na dindindin, ko a matsayin harsashi don samar da tarin simintin siminti.
Mataki na 2 da na 3 sune maki biyun nan.
An kasu A252 zuwa maki uku tare da ingantattun kaddarorin inji.
Sun kasance: Mataki na 1, Grade 2, daDarasi na 3.
Mataki na 2 da na 3 sune maki mafi yawan amfani da su a cikin ASTM A252, kuma mun bayyana kaddarorin maki biyu dalla-dalla na gaba.
ASTM A252ana iya ƙera su ta hanyar walƙiya mara kyau, juriya, walƙiya mai walƙiya, ko hanyoyin waldawa.
A cikin aikace-aikacen tari na bututu, bututun ƙarfe maras nauyi suna ba da kyakkyawan tallafi saboda ƙarfin ƙarfinsu da halaye na ɗabi'a.
Bugu da kari, ana iya kera bututun karfe maras sumul tare da kaurin bango mai kauri sosai, wanda ke ba su damar jure matsananciyar damuwa, yana kara inganta amincin su a cikin tsarin tallafi.
Abubuwan da ke cikin phosphorus bai wuce 0.050%.
Babu wasu abubuwa da ake buƙata.
Karfin tenarshe da kuma yawan amfanin ƙasa ko kuma yawan amfanin ƙasa
| Darasi na 2 | Darasi na 3 | |
| Ƙarfin ɗaure, min | 60000 psi[415MPa] | 60000 psi[415MPa] |
| Ƙarfin bayarwa ko Ƙarfin Haɓaka, min | 35000 psi[240MPa] | 45000 psi[310MPa] |
Tsawaitawa
Ana iya samun takamaiman bayanai a cikiTakardar bayanan ASTM A252.
| Jerin | Tsara | Iyakar |
| Nauyi | Nauyin Ka'idar | 95% - 125% |
| Waje Diamita | Ƙayyadaddun Diamita na Waje | ± 1% |
| Kaurin bango | ƙayyadadden ƙayyadadden kauri bango | min 87.5% |
| Tsawon bazuwar guda ɗaya | 16 zuwa 25 ft [4.88 zuwa 7.62 m], inci |
| Tsawon bazuwar sau biyu | sama da 25 ft [7.62m] tare da matsakaicin matsakaici na 35 ft [10.67m] |
| Tsawon Uniform | tsayi kamar yadda aka kayyade tare da halattaccen bambancin ±1 in. |
ASTM A370: Hanyoyin Gwaji da Ma'anar Gwajin Injini na Kayan Karfe;
ASTM A751: Hanyoyin Gwaji, Ayyuka, da Kalmomi don Nazarin Sinadarai na Samfuran Karfe;
ASTM A941: Kalmomi masu dangantaka da Karfe, Bakin Karfe, Abubuwan da ke da alaƙa, da Ferroalloys;
ASTM E29: Kwarewa don Amfani da Mahimman Lambobi a cikin Bayanan Gwaji don Ƙaddamar Ƙarfafawa tare da Ƙididdiga;
Botop Karfe babban welded carbon karfe bututu manufacturer da kuma maroki daga kasar Sin, da kuma wani m karfe bututu stockist, ba ku da fadi da kewayon karfe bututu mafita!
