Astm ATM A234 game da maki da yawa, kamar wpb, wpc, wp5, WP9, WP2, WP91 da sauransu.
A cikin waɗannan daidaitattun WPB shine mafi yawan kayan gama matsakaici da kuma cutar zazzabi mai yawa. W Yana nufin weldable, p yana nufin matsin lamba, b shine aji B, yana nufin ƙarancin amfanin ƙasa.