ASTM-335 daSA-355MStandarda Digiri na Selika Ferritic Alloy-Karfe bututun don sabis na babban-zafi.
Ya kasance na lambar tukunyar jirgi da matsa lamba.
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Dole ne fam ɗin odar ya ƙunshi abubuwa 11 masu zuwa:
1. Yawan (ƙafa, mita ko adadin sanduna)
2. Material Name (Material Alloy Karfe maras bututu)
3. Matakai (16 a duka: P1, P2, P22, P11, P22, P91)
4. Hanyar masana'anta (zafin ƙarewa ko zane mai sanyi)
5. Yi amfani da daya daga cikin wadannan bayani dalla-dalla: 1), NPS da bututu bango kauri serial number, 2), m diamita da maras muhimmanci bango kauri, 3), m diamita da m bango kauri, 4), ciki diamita da maras muhimmanci bango kauri , 5), diamita na ciki da ƙaƙƙarfan umarnin umarni na kauri
6. Tsawon (an raba zuwa tsayayyen tsayi da tsayi mara iyaka)
7. Ƙarshen sarrafawa.
8. Bukatun zaɓi (matsi na ruwa da ƙetare nauyin da aka yarda).
9. Rahoton gwajin da ake buƙata (duba A530).
10. Daidaitaccen lamba.11 Bukatu na musamman ko kowane ƙarin buƙatun na zaɓi.
Materials da masana'antu
1. Bututun ƙarfe na yau da kullun na iya zama zafi-ƙare ko sanyi-jawo, kuma sun sha maganin zafi na ƙarshe da ake buƙata ta ma'auni.
2. P2 da P12 karfe sa.Ya kamata a kera waɗannan nau'ikan ƙarfe guda biyu ta amfani da tsarin narkewar hatsi.Idan akwai buƙatu na musamman don girman hatsi ko tsarin deoxidation, ya kamata masu siye da masu kera ƙarfe su amince da su.
3. Maganin zafi
1. Sai dai PSC, P23, P91, P92, P122 da P911 karfe sa na karfe kuma kamar yadda aka ƙayyade, duk maki na bututu mara kyau za a sake mai da su kuma a kawo su a cikin cikakken annealed, isothermal annealed ko daidaitawa da yanayin yanayi.Idan aka kawota cikin yanayin al'ada da yanayin zafi, mafi ƙarancin zafin jiki na P5, P5B, P9, P21 da P22 ƙarfe mai daraja zai zama 675°C.Matsakaicin zafin jiki na P1, P2, P11, P12 da P15 karfe ya kamata ya zama 650 ℃
2. The karshe zafi jiyya na P92 da P911 sa karfe ya kamata a normalizing a m na 1040 ℃ da tempering a m na 730 ℃.