Product description
A, special material valve production capacity:
Shanghai Jingyi Valve Manufacturing Co., Ltd. is a national high-tech enterprise engaged in the research, production, sales of rare and precious metal material valve. Mainly used in the production of high-temperature alloy, corrosion resistant alloy, precision alloy, belong to the new special alloy materials, is encouraged by the state industry. Professional to provide special materials, special design, special condition and emergency delivery solution.
High temperature alloy is mainly used in the manufacture of aircraft, ships and industrial gas turbine, spacecraft, rocket engine, nuclear reactor, petrochemical equipment and coal conversion of energy conversion device, guide vane of turbine blade, turbine disk, high pressure air compressor and combustion chamber of high temperature components, now we put it into the valve body and valve regulating valve, valve parts in the application process.
Strong corrosive medium for ordinary metal valve corrosion harm spontaneous process largest chemical industry, therefore, regulating valve, the valve technology development and application of corrosion resistant alloy, has great social significance and economic value;
Over the years Shanghai Jingyi Valve Manufacturing Co. Ltd. has been serving the harsh conditions, such as high temperature, high pressure, strong corrosive, flammable and explosive, toxic, corrosion resistance, high temperature high pressure valve material and high strength, high precision. We have accumulated rich experience, has the ability to provide professional advice and products for customers.
904L has the following characteristics:
904L is a kind of high alloy austenitic stainless steel carbon content is very low. The steel is designed for corrosion in harsh environmental conditions. The initial alloy was developed for corrosion in dilute sulfuric acid. The characteristics of the practical application for many years has been proved to be very successful. Now 904L in many countries has been standardized, and has been approved to have in the manufacture of pressure vessel. 904L alloy and other commonly used CrNi austenitic steel, resistant to some good corrosion and crevice corrosion ability, high resistance to stress corrosion cracking ability, good resistance to intergranular corrosion, good machinability and weldability. Hot forging the highest heating temperature can reach 1180 degrees Celsius, the lowest stop forging temperature of not less than 900 degrees celsius. This steel hot forming can be carried out in the 1000--1150 degrees celsius. Heat treatment process of the steel is 1100--1150 degrees Celsius, fast cooling after heating. This steel can be used welding process general welding welding, but the most appropriate way is manual electric arc welding and TIG welding. When using the manual arc welding is not greater than 6 mm plate electrode diameter less than 2.5 mm; when the plate thickness greater than 6 mm electrode diameter less than 3.2 mm. When welding after heat treatment, can be in 1075--1125 degrees Celsius heating and fast cooling after treatment. Using argon tungsten arc welding filler metal is available with material welding rod, welding weld shall be by pickling, passivation.
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