Menene bututun Astm A269?

Mu masana'anta ne na bututun ƙarfe na astm a249, ma'aunin shine bututun ƙarfe na ASTM A 249, bututun yana da daidaito ASTM A249. saman yana da haske, tsawonsa shine 4000m/Coil, bututun ƙarfe yana da laushi, ana iya amfani da shi don filin mai, daidaita bututu, Kayan aiki