Regarding the material issues of pneumatic control valves (emergency, re-line, etc.)
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There is a pneumatic regulating valve. The material of the valve core/seat is 316SS+ST. Could you please tell me what the material of ST is? Thank you!
ST represents the joint type, threaded connection.
The 2nd floor is right, ST is not a material, it is a type of valve end connection, such as SAE/MS straight thread: ST connector: (4ST, 6ST, 8ST, 10ST)
The 2nd and 3rd floors are wrong. ST is the abbreviation of Stellite, and its Chinese name is Stellite or Stellite. It is a nickel-based cemented carbide that is commonly used as a surface hardening material for valve seats and is generally surfacing on the valve seat base material.
I agree with what you said above, because I heard from experts in our factory that it is also a surfacing material, but I don’t know what it is.
It is made of stainless steel 316 and cladded with Starley alloy. It is mainly used when the pressure difference exceeds ten kilograms and the flow rate is fast. It is relatively wear-resistant and has a long life.
The fourth floor statement is correct. Stellite alloy is abbreviated as STL or ST. The carbide layer increases the surface hardness and extends the service life of the valve.
Yes, I agree with the fourth floor's opinion. Many valve specifications given by design institutes are written in this way to increase corrosion resistance, erosion resistance and durability.
Posts from 2007 can also be dug up. This is a great job.
A search on Baidu for a question like this will basically give you a vague understanding of it.
ST is the abbreviation of Stellite, which is commonly known as cobalt-based alloy. It is translated into Stellite alloy or Stellite alloy in my country. Stellite alloy is a type of alloy with cobalt as the main component, containing a considerable amount of nickel, chromium, tungsten and a small amount of molybdenum, niobium, tantalum, titanium, lanthanum and other alloying elements, and occasionally also contains iron. Depending on the composition of the alloy, they can be made into welding wires, and the powder can be used for hard surfacing, thermal spraying, spray welding and other processes. They can also be made into castings and forgings and powder metallurgy parts.
The 2nd and 3rd floors were mentioned in 2007, it’s over!
Which of these two statements is correct?
First of all, this is a shortcoming of English. Many English abbreviations are very confusing and not as intuitive as Chinese abbreviations. Of course, when it comes to the regulating valve, it refers to the material.