WB36 material and F11 material
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What is the difference between WB36 material and F11 material? The customer said the pipes are made of WB36 material, so what material should my valves be made of? Is it WB36 or F11?
WB36 is a German grade; its forged form is F36, which is a steel containing 1.15% nickel and 0.65% copper, molybdenum, and niobium. F11, on the other hand, is a chromium-molybdenum steel, and its physical and chemical properties are different. Generally, valves should be made of the same material as the pipes; if welding is used for connection, it is best that the materials are identical. Of course, this is not absolute either; many carbon steel pipes use stainless steel valves. Personally, it is advisable that the material of the valve be the same as or better than that of the pipeline, but the specific medium and operating conditions still determine the appropriate choice.