Pneumatic valve materials means to WCB

the body of the pneumatic valve material, for the friend that do stainless steel pneumatic valves, except there are often customers ask to stainless steel pneumatic valve, also often come into contact with the pneumatic valve WCB inquiries. Yesterday I said in the log said 'CF', a friend told me a message: discuss such a primary question is necessary? I carefully wanted to think, just contact with my original intention is to let more friends know pneumatic valve, for professional, his brother will tell you, please include more!
just like CF8, WCB material standard comes from the United States, its specific standards for the corresponding ASTMA216 / A216M, and the corresponding standard (CF8 ASTM A351 / A351M) Different. ASTMA216 / A216M WCA, WCB, WCC is A common brand, and is the most commonly used with WCB, the brand of the basic meaning is: W said to welding, C said for casting, and the third letter 'A, B, C', said the strength level of the carbon steel casting, including A low intensity and B for the moderate intensity, C for high strength.