ASTM A420 ndiyo matsikirwo emapipi emapipi ecarbon simbi uye alloy simbi inoshandiswa kune yakadzika tembiricha. Wpl6 ndiyo inonyanya kushandiswa giredhi zvinyorwa pasi peA420.
Kunze kweGrade WLL6, iyo chiyero chinosanganisirawo wpl9, wpl8, wpl8, chipi chinobatsira tembiricha zvinoenderana neAn -45¡æ, -75¡æ, -100¡æ, -195¡æ.