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What material is used in the valve stem production design in the valve fitting?

Apr 23, 2018

Valve stem production design materials for valve fittings are first made of stainless steel:

Valve stems in the valve fittings will generally also choose materials such as 2Cr13, 3Cr13, 1Cr17Ni2, 1Cr18Ni12Mo2Ti. 2Cr13, 3Cr13 stainless steel is suitable for water, steam and weakly corrosive media with nominal pressure less than or equal to 32MPa and temperature less than or equal to 450 degrees. The surface can be strengthened by chrome plating, high frequency quenching and other methods. 1Cr17Ni2 stainless steel valve, low temperature valve, resistant to corrosive media. 1Cr18Ni9Ti can resist nitric acid and other corrosive media; 1Cr18Ni12Mo2Ti can resist acetic acid and other corrosive media.

Valve stem production design materials for valve fittings also use bearing chrome steel:

The valve stem production design in the valve fittings is GCr15 material, which is suitable for ultra-high pressure valves with nominal pressure less than or equal to 300 MPa and temperature less than or equal to 300 degrees. There are many materials used to make the stem, there are 4Cr10Si2Mo martensitic heat-resistant steel, 4Cr14Ni14W2Mo austenite heat-resistant steel and so on.

Valve stem production design materials for valve fittings also use copper alloys:

The commonly used grades are QA19-2 and HPb59-1-1. Suitable for low pressure valves with nominal pressure less than or equal to 1.6MPa and temperature less than or equal to 200 degrees.

Valve stem production design material for valve fittings is carbon steel:

This valve fitting will also generally use A5, 35 steel, after nitriding, suitable for the nominal pressure less than or equal to 2.5MPa ammonia valve, water, steam and other medium, low, medium pressure valve. A5 steel is suitable for valves whose temperature does not exceed 300 degrees; 35 steel is suitable for temperatures not exceeding 450 degrees. (Note: The actual route proves that the use of carbon steel nitriding for the valve stem does not solve the corrosion problem well and should be avoided.)

Valve stem production design material for valve fittings is alloy steel:

The alloy steel in the valve stem production design material of the valve fitting will generally use 40Cr, 38CrMoA1A, 20CrMo1V1A and other materials. After 40Cr is chrome-plated, it is suitable for mediums with water pressure, steam, and oil with nominal pressure less than or equal to 32MPa and temperature less than or equal to 450 degrees. 38CrMoA1A is nitrided and can withstand a pressure of 10MPa under a working temperature of 540°C. It is commonly used on power station valves.http://www.dmgcastings.com/