Astm A995 Gr4a ((hot)) -

Do not stress relieve duplex castings in the 300-1000°C range. This is the “danger zone” for sigma and chi phase formation.

Welding ASTM A995 Gr4A requires strict procedure control. Unlike austenitic grades, duplex castings are more sensitive to heat input. astm a995 gr4a

(UNS J93380) is the material of choice when the application demands: Do not stress relieve duplex castings in the