Oil & GasValves
Choke valve body (wellhead / christmas tree utility service)
API 6A (wellhead chokes). Trim: tungsten carbide or Stellite hard-facing for erosion resistance. CA6NM: quench & temper; hardness <23 HRC (NACE).
Specifications
Material
Cast Steel WCB / WC6; CA6NM (13Cr-4Ni, erosion resistant); duplex SS
Grades
WCB;WC6;CA6NM
Material Class
DuplexCast Steel
Applicable Standards
API 6A
Common Processes
Investment casting (small hardened bodies); resin sand (large bodies)
NDT & Inspection
RT; PT; hydrostatic; hardness; dimensional (Cv/orifice geometry); PMI
Typical Specs & Notes
API 6A (wellhead chokes). Trim: tungsten carbide or Stellite hard-facing for erosion resistance. CA6NM: quench & temper; hardness <23 HRC (NACE).