S31254 vs. C276 5

S31254 is an austenitic stainless steel. Due to its high molybdenum properties, it has high resistance to pitting corrosion and air corrosion. This brand of stainless steel is the environment where many halogens have been developed and developed.

S31254 is a very good resistance to uniform corrosion. Especially in halide-containing acids, this steel is better than stainless steel in general. It contains C so it is called pure austenitic stainless steel (also known as super austenitic stainless steel).

Super is a special kind of stainless steel, first of all, it is different from general stainless steel in terms of chemical composition, and refers to high-alloy stainless steel with high nickel, high chromium, and high molybdenum. In S31254, S31254 containing 6% MO, this steel has better local corrosion resistance than seawater, aeration, gaps, low-speed erosion, etc., and has good pitting resistance (PI40) and good stress corrosion resistance, and is a substitute material for Ni-based alloys and titanium alloys. Secondly, in terms of heat resistance and corrosion resistance, heat resistance and corrosion resistance have reached the irreplaceable level of stainless steel.

In addition, in terms of stainless steel division, the specific metallographic structure of stainless steel is a stable austenitic metallographic structure.

Because this special stainless steel is a high-alloy material, it is very complex in the manufacturing process, and usually ordinary people only rely on traditional processes to manufacture, such as infusion, forging, calendering, etc.

Corrosion resistance: As a new type of corrosion-resistant super austenitic stainless steel, it has been widely used in halide and acid environments, and is widely used in severe production conditions such as high concentration chloride ion media and seawater. In various industrial fields with acidic media, especially in acids containing halides, S3's 1254 is much better than other stainless steels, and can sometimes be different from Hastelloy, titanium, etc.

It has low carbon content, high molybdenum content, and can well resist pitting corrosion, crevice corrosion resistance, and intergranular corrosion resistance, and is a cost-effective stainless steel, which has been widely used in chemical industry, desulfurization and environmental protection at home and abroad.

Matching welding consumables: Ernicrmo-3 welding wire, EniCRMO-3 welding rod.

Applications:1Ocean: marine structures of the marine environment, seawater desalination, mariculture, seawater heat exchange, etc.

2.Environmental protection field: flue gas desulfurization device for thermal power generation, wastewater treatment, etc.

3.Energy field: nuclear power generation, comprehensive utilization of coal, tidal power generation, etc.

4.Petrochemical field: oil refining, chemical equipment, etc.

5.Food field: salt making, soy sauce brewing, etc.

6.High concentration chloride environment: paper industry, various bleaching devices.

The high temperature and corrosion resistance of 276 material is better than that of S31254.

Hastelloy C-276 Hastelloy, nickel-chromium-molybdenum alloy, high temperature and corrosion resistance.

Overview of Hastelloy C-276 Features and Application Areas:

The alloy has excellent corrosion resistance to most corrosive media in both oxidized and reduced states. Excellent resistance to pitting, crevice and stress corrosion cracking. The alloy is suitable for use in a wide range of chemical process industries containing oxidizing and reducing media.

The high molybdenum and chromium content makes the alloy resistant to chloride ions, and the tungsten element further improves its corrosion resistance. Hasteloy C-276 is one of the few materials that is resistant to moist chlorine, hypochlorite, and chlorine dioxide solutions, and the alloy has significant corrosion resistance to high concentrations of chloride solutions (e.g., ferric chloride and copper chloride).

Hastelloy C-276 Chemical Composition: Silicon Si ( Chromium Cr ( Fe ( Fe (.)

Phosphorus P( Sulfur S( Nickel Ni (Margin) Molybdenum Mo(Cobalt Co( Carbon C( Tungsten W (Manganese Mn (

Scope of applicationFields of application:

Chemical process industrial reactors, heat exchangers, columns, and piping. Pharmaceutical industry reactors and dryers. Flue gas desulfurization system. Pulp and paper industry, such as boiling and bleaching vessels. Equipment and components operating in an acidic gas environment.

Physical properties: density g cm3 ( melting point ( 1323-1371) thermal conductivity (w m) modulus of elasticity gpa (.

Compared with C276 materials, C276 is better than S31254 in terms of high temperature resistance and corrosion resistance.

S31254 and C276 are actually not too comparable, the nickel content of the two is too different, and the environment they target is also different, I don't know what you want to know?

316 stainless steel is oneAustenitic stainless steelDue to the addition of MO elements, its corrosion resistance and high temperature strength have been greatly improved, and the high temperature resistance can reach 1200 1300 degrees, which can be used under harsh conditions.

The main applications are pulp and paper equipment, heat exchangers, rock preparation, dyeing equipment, film processing equipment, pipelines, and materials for the exterior of buildings in coastal areas. In 2013, it was also used in the field of solenoid valves, mainly for housings, clamps, balls, valve bodies, valve seats, nuts, valve stems, etc.

S31603 is a molybdenum-containing stainless steel grade, and the overall performance of this steel grade is better than that of 310 and 304 stainless steels due to the molybdenum content in the steel.

At high temperatures, when the concentration of sulfuric acid is less than 15% or higher than 85%, 316L stainless steel.

It has a wide range of uses. 316L stainless steel also has good chloride resistance.

erosion properties, so it is usually used in the marine environment. The maximum carbon content of S31603 stainless steel can be used in applications that cannot be annealed after welding and where maximum corrosion resistance of rental wheels is required.

S31803 belongs to duplex stainless steel. 22% chromium duplex (austenitic ferritic) steel (type 2205) with medium to high strength and good resistance to common corrosion stress, corrosion cracking.

<> alloy is resistant to chloride environments and sulfide stress corrosion, and is approximately twice as strong as standard austenitic stainless steels. Higher mechanical strength is required At a lower weight, the alloy can be successfully used as a replacement for 300 series austenitic stainless steels. The F51 is easy to weld with many standard arc welding equipment, but is not recommended for oxyethylene block welding due to the potential for carburization of the weld metal.

The corresponding domestic material of S31803 is 00Cr22Ni5Mo3N material, referred to as 2205 duplex steel.

S31803 is a duplex stainless steel with medium to high strength and good resistance to common corrosion, stress, corrosion and cracking.

135-2435-1833 seamless pipe 2205

S32168 belongs to the national standard NB austenitic stainless steel. Corresponding to China's stainless steel material grade austenitic stainless steel has good corrosion resistance in the atmosphere, and is widely used in petrochemical, electric power, bridge and automobile industries. However, the "stainless steel" of stainless steel is not absolute, and due to the special use environment, stainless steel will also corrode.

Factors such as medium concentration, pH value, and temperature will have a great impact on the corrosion resistance of stainless steel. <

S32168 belongs to the national standard containing NB austenitic stainless steel slippery. S32168 corresponds to China's stainless steel material grade austenitic liquid matrix stainless steel has good corrosion resistance in the atmosphere, and is widely used in petrochemical, electric power, bridge and automobile industries. However, the "stainless steel" of stainless steel is not absolute, and stainless steel will also corrode due to the special noisy use environment.

Factors such as medium concentration, pH value, and temperature will have a great impact on the corrosion resistance of stainless steel.

S32168 stainless steel is used in the manufacture of petroleum exhaust gas combustion pipes, shells, heat exchangers, heating furnace parts and other equipment with very harsh working environments, and it is often seen at home and abroad that S32168 stainless steel has been reported to be stressed corrosion fracture. In this paper, the effect of temperature and pressure of S32168 stainless steel on stress corrosion in chloride ion environment was studied by using the slow strain rate tensile test method.

The grade of S32168 austenitic stainless steel is 06Cr18Ni11Ti, and the chemical composition is shown in Table 1. Lacong judged that the S32168 austenitic stainless steel material was processed into NACE standard test sheep. After the surface of the sample is polished and smoothed with sandpaper, the sample is put into ethanol and acetone solution for ultrasonic cleaning, and then rinsed with deionized water and blown dry to remove the oil and debris on the surface of the sample wheel.

S32168 Chemical Composition.

The solution used for the test is NACE standard solution. The specimen is clamped on the fixture located in the reactor, after adding the NACE standard solution in the reactor, tighten the upper end cap and seal it, open the exhaust valve, pass into N, discharge the air in the kettle, close the exhaust valve, increase the pressure in the kettle, stop the ventilation when the pressure reaches a predetermined value, and close the inlet valve at the same time. The temperature required for the test is controlled by a heating jacket placed outside the reactor.

The test was set at a tensile rate of s. According to the highest operating parameters of the equipment made by S32168 reported in the current literature, the combination of temperature and pressure in the corrosive environment of the five groups of tests was determined, and the fractured specimen was compared with the air-drawn specimen. The test environment for each specimen is shown in Table 2.

The stress corrosion performance of S32168 austenitic stainless steel in different environments is shown in Table 3.

Under the test conditions, S32168 austenitic stainless steel has no stress corrosion susceptibility in air and stress corrosion susceptibility in NACE solution. Under the test conditions, with the increase of ambient temperature and pressure in the NACE solution, the stress corrosion characteristics of the sample become more and more obvious, and the stress corrosion sensitivity index of the sample reaches the maximum value when it is in the environment of 260 11MPa, and the stress corrosion resistance of the sample is the worst. Under the test conditions, the higher the pressure at the same temperature, the higher the stress corrosion susceptibility of S32168 austenitic stainless steel.

Are S31608 and 316 the same material? Hello dear, <> is the same material as S 31608 and 316. From the perspective of chemical composition, 06cr17ni12mo2 (s31608) is the same material as 316, but the implementation standard is different.

The old grade of 316L is 00Cr17Ni14Mo2, the new grade is 022Cr17Ni12Mo2, and the unified digital code is: The old grade is 0Cr17Ni12Mo2, the new grade is 06Cr17Ni12Mo2, and the unified digital code is: S31608.

Quoted from GB T20878-2007. There is S31608 material in NB T47010-2010 stainless steel flange forgings, which corresponds to 0Cr17Ni12Mo2 in JB T4728-2000 stainless steel flange forgings. That is, the American Standard 316 hopes to help you!