We are offering tungsten carbide coated ball-tcc ball, wcc ballnominal size: dn6"-60"(dn150-1500)pressure rating: ansi 150-2500(pn16-420)base material:-ferrite steel: astm a105, a105n; a350 lf2-austenitic steel: a182 f304, f304l, f316, f316l, f317, f317l, f321 -duplex, super steel: a182 f51f53f55f60-martensite steel: a182 f6aaisi 410 -nickel alloy steel: monel, inconel, hastelloy, -precipitation hardening steel:17-4pha564 gr.630 coating:-enp -chrome plating- tin coating titanium nitride coating-tcc(tungsten carbide coated)-chrome carbide-stellite coated-inconel coated-special coatedsphericity: ra0.2-0.4 on spherical surfacefor metal seat ball valves, aea have rich experiences on the kit's seats and balls, lapping and grinding are carried out after the coating operation.