API 11AX V11 series valve balls and valve seats

API Standard Spec V11-225 Cobalt Alloy Valve Balls and Valve Seats

main material  for reference:

Symbol	Symbol	Hardness	Material
A1	Stainless Steel	Ball: HRC 58-65 Seat: HRC 52-56	UNS 41000–UNS 44000
B1	Cobalt Alloy, Cast	Ball: HRC 56-63 Seat: HRC 50-56	Cobalt, chromium, and tungsten alloy
B2	Cobalt Alloy, Powder Metal	Ball: HRC 53-60 Seat: HRC 51-57	Cobalt, chromium, and tungsten alloy
C1	Tungsten Carbide	Ball: HRA 88-89 Seat: HRA 88-89.5	Tungsten with Cobalt binder
C3	Titanium Carbide	Ball: HRA 89-90.5 Seat: HRA 89-90.5	Tungsten and titanium carbide with cobalt binder

Sucker rod pumps valve balls and valve seats   are widely used  in oil fields , their performance directly affects the use effect and service life of the pumps.

Materials have stainless steel, ceramic, hard alloy (tungsten carbide), and can meet the needs of various well conditions., with  advantages of high hardness, wear resistance, corrosion resistance.

Features:

1) Castings of main alloys: cobalt-base alloy, nickel -base alloy and stellite alloy

2) Available forms: end product or blank

3) Properties: good resistance against corrosion and oxidation

4) Main application: extensively used in petrochemical industry, marine     exploration, heat exchanger and pump ;