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Difference between hot rolled stainless steel plate and cold rolled stainless ……

Up to now, there are still many customers who can’t distinguish between cold rolled stainless steel sheet and hot rolled plate. Generally speaking, the surface of cold-rolled stainless steel plate is bright, smooth and beautiful; the surface of hot-rolled stainless steel plate belongs to industrial surface, rough surface, and has a touch. What is hot rolled stainless steel plate? Hot rolled stainless steel plate is relative to cold rolling, cold rolling is rolling below recrystallization temperature, and hot rolling is rolling above recrystallization temperature. Its characteristics are as follows: 1. The toughness and surface smoothness are poor and the price […]

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How is the stainless steel bolt broken?

UNS S43100 stainless steel is a kind of martensitic ferritic stainless steel, which is introduced into ASTM standard. It is characterized by retaining corrosion resistance of ferritic stainless steel and high strength of martensitic stainless steel, so it is widely used in industry. Generally, the materials used for bolts are 40CrNiMoA, 42CrMo and 12cr13. However, the corrosion resistance of the materials in seawater is not as good as that of UNS S43100 stainless steel. Therefore, UNS S43100 stainless steel is the preferred material for bolts in seawater environment. However, the heat treatment process of UNS S43100 stainless steel is very […]

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Stainless steel polishing for surface processing

The surface processing of stainless steel is different, so that it has a variety of surface processing applications. In the field of architectural application, the surface processing of stainless steel is important for many reasons. Basic types of surface processing There are about five kinds of surface processing that can be used for stainless steel. They can be combined to produce more final products. The five species are: Rolling surface processing Mechanical surface processing Chemical surface processing Chequer surface processing Color surface processing There are also some special surface finishes, but no matter which one is specified, the following steps […]

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Causes of regulating valve failure

Regulating valve is also known as control valve. In the field of industrial automation process control, it accepts the control signal output by the adjustment control unit and uses power operation to change the final control element of process parameters such as medium flow, pressure, temperature, and liquid level. Generally composed of actuators and valves. According to the characteristics of the stroke, the control valve can be divided into straight stroke and angular stroke; according to the power used by the actuator, it can be divided into three types: pneumatic control valve, electric control valve, and hydraulic control valve; according […]

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How to choose the correct pipeline compensator?

Origin of compensator The basic meaning of compensation is to make up for defects and offset losses. There is also compensation in science and technology. When there is a temperature change in the pipeline conveying medium or the environment where the pipeline is located, the thermal expansion and cold contraction caused by the temperature of the pipeline is inevitable. If a certain way is not taken to compensate for the size change, a very high stress will be generated in the pipe wall, which will be transmitted to the fixed pipe support or equipment through the pipe. When the temperature […]

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Nickel-based super alloy: Hastelloy G35 (UNS N06035)

What is Hastelloy G35? Hastelloy G-35, named UNS N06035 or din 2.4643, is a nickel chromium molybdenum alloy designed to resist “wet process” phosphoric acid and is used in fertilizer production. Similar to Hastelloy G-30, Hastelloy G-35 alloy has good local corrosion resistance in the presence of chlorides, as this may be a problem beneath the deposits in the evaporator for concentrating “wet process” phosphoric acid. In addition, compared with stainless steel and nickel chromium iron alloy used in traditional “wet process” phosphoric acid, it is less susceptible to stress corrosion cracking caused by chloride ions. Due to the high […]

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Research progress on coking mechanism and protective measures of ethylene crac……

Introduced the three coking mechanisms of ethylene cracking furnace tube catalytic coking, free radical coking and gas phase coking, as well as the development of coking suppression technology at home and abroad in recent years, and how to improve the cracking raw materials and furnace tube materials, and optimize the cracking process and structure. The use of coking inhibitors and surface coating technologies are introduced in detail. Finally, relevant suggestions are put forward on how to reduce the coking situation and improve the service life of the furnace tube. The comprehensive use of a variety of measures to inhibit coking […]

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Nickel-based super alloy: Hastelloy G30 (UNS N06030)

What is Hastelloy G30? Hastelloy G-30 is designated as UNS N06030 or DIN 2.4603. It is a nickel-chromium-iron material with excellent resistance to phosphoric acid environment (wet process). Hastelloy G30 is a nickel-based high-temperature alloy composed of nickel, chromium, cobalt, tungsten and other elements, with a nickel content of about 37%. It is also moderately resistant to local corrosion caused by chlorides, which may be a problem under the deposits in the evaporator used to concentrate phosphoric acid. In addition, compared with stainless steel, G-30 alloy is less susceptible to stress corrosion cracking caused by chloride. Hastelloy G30 is a […]

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Nickel-based super alloy: Hastelloy G3 (UNS N06985)

What is Hastelloy G3? Hastelloy G3 (also known as “Alloy G3”) is designated UNS N06985 or DIN 2.4619 and is a nickel-chromium-iron alloy with added molybdenum and copper. It has good weldability and has the ability to resist intergranular corrosion under welding conditions. The low carbon content helps prevent sensitization of the welding heat-affected zone and subsequent intergranular corrosion. Hastelloy G3 is commonly used in flue gas scrubbers and processing reducing acids, such as phosphoric acid and sulfuric acid. Hastelloy G3 is a nickel-based high-temperature alloy composed of nickel, chromium, molybdenum, cobalt and other elements, with a nickel content of […]

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Terminator of water leakage: stainless steel corrugated water pipeline

The huge urban water supply network will be from the source of water, after the treatment of water plants to thousands of households, without it, life is unimaginable. But on average, more than a quarter of the water produced by water companies is lost in the middle of the way and does not reach the customers. The main cause of water leakage is the leakage and explosion of old pipes, as well as the loosening or corrosion of pipe fittings. On average, 25-30% of the world’s water is lost during transportation. In Europe, an average of 26% of water is […]

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