I-ASTM A815 igubungela iiklasi ezimbini ngokubanzi, i-WP neCR, yeFerricric Ferric, i-Ferricuric Fortic, i-Ferricuric \ / Austisic, kunye ne-Martiatic Syltings yensimbi yokwakha intsimbi engenamthungo kunye ne-weldied.
Abavelisi beentsimbi ezingalunganga bavelisa ezi zinto zilungele i-manganese, phosphorus, ikharbon, silicon, kunye nesalfur ngaphandle kwezinto ezi-2 eziphambili.
Oku kufanelekile ke kube yinxalenye yenkqubo yokuthutha ulwelo (ioyile, igesi, isitya, iikhemikhali, ...) ngendlela ekhuselekileyo nefanelekileyo.
I-Weldmed Astm i-A403 i-Steel Steel Scings yenziwe ngamaqhekeza eepleyiti zentsimbi. I-stainess pump ye-pume yenziwa nge-10% i-nickel kunye nomxholo we-chromium ephezulu.