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Welding of duplex stainless steel pipe with good performance

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Detail infomation

Standards: ASTM/ASME A789/SA789, A790/SA790,A450,A530

Material: UNS S31803(Cr22Ni5Mo3/1.4462)/2205,UNS S32750(1.4410),UNS S31500(Cr18NiMo3Si2),

UNS32760(1.4501)

Chemical Composition

Physical Properties

Supplementary Testing :

we also carry out on the manufactured products supplementary testing.

Eddy Current Testing O.P Testing Radiography Testing	Corrosion Testing Micro Testing Macro Testing	IGC Testing Ultrasonic testing Liquid Penetrate testing

Radiography Testing

Macro Testing

Liquid Penetrate testing

Q:Why is stainless steel magnetic?: 304 stainless steel after cold processing, the structure of the structure will also change to martensite, and the greater the deformation degree of cold work, the more martensitic transformation, the greater the magnetic properties of steel. Like a lot of steel strips, the product is made up of 103 tubes, without obvious magnetic induction, producing 9.5 tubes. Due to the large deformation of the Ling bend, the magnetic sense is obvious, and the square tube produced by the utility model has larger deformation than the round tube, especially the folding part, the deformation is more intense, and the magnetism is more obvious. In order to completely eliminate the magnetic properties of the 304 steel caused by the above reasons, the stable austenite structure can be recovered by the solution treatment at high temperature so as to eliminate the magnetism. In particular, magnetic because it causes 304 stainless steel, and other materials such as stainless steel, carbon steel, magnetic 430 is not the same level, that is to say the magnetic steel 304 always showed a weak magnetic.

Q:How about stainless steel 2520 and 316?: Their nickel content is different. 2520 contains about 20 nickel, 316 contains about 13 nickel, and contains 2 molybdenum.

Q:What are the connecting methods of stainless steel pipes for indoor water pipes?: Card type features: easy to install, connecting the external pipe, the internal rubber ring is evenly compressed into hexagonal. Scope of application: cold water system, pipe direct drinking water system, and more suitable for pipe installation. The utility model has the advantages that the connection is simple and convenient, the working hours are short, and the cost is moderate. Drawback is the single application, the maintenance of trouble, both the pipe sealing ring in aging and need to be replaced more trouble, because the connection was stuck, replacement is the need to both ends of the pipe to replace the sawing.

Q:How can I clean the stainless steel tube?: Stubborn or burned stains, can be mixed with baking soda and water, wipe with a soft cloth.

Q:What factory uses industrial stainless steel tube to be more?: The electric power industry including nuclear power industry, the demand for stainless steel tube is large, the industry mainly uses the stainless steel seamless pipe, specific application fields: boiler pipes, water pipes, power tubes etc..According to the World Nuclear Association reports, China has 5 power stations under construction, 6 included in the plan, 19 are planning, it is estimated that power plant construction and maintenance of various types of stainless steel pipes each year about 25600 tons.

Q:In stainless steel tubes, why are there some SS in the back and some standard L, such as 316L and 316SS? What's the difference?: The strength of the 2 is the sameBut the removal of carbon from stainless steel costs enormous energy, so don't look at carbon from 316 of 0.08% to 0.03% of 316L, but the price is much higherIn conclusion, the later logo, whether it's L, SS, and others, has its different implications, representing the properties of this material

Q:Why can't stainless steel tubes be cut with acetylene?: Is mainly from Huoxian, heating flame is mainly open before cutting and cutting plate preheating on the auxiliary heating.Stainless steel, chromium containing at least 13% or more, it hinders the exothermic oxidation and melting phenomenon, which is higher than that of iron chromium to 316 degrees, 1855 degrees, so can not use stainless steel oxygen - acetylene flame cutting.

Q:310 stainless steel resistance to high temperature?: Features: suitable for making all kinds of furnace components, with a maximum temperature of 1200 degrees, continuous use temperature of 1150 degrees CelsiusUses: furnace materials, materials for automotive cleaning equipment

Q:How thick is the 3 stainless steel tube?: Refers to the stainless steel tube with a wall thickness of 3 mm.

Q:What is the difference between stainless steel tube 304L and 304N?: The lower carbon content minimizes the precipitation of carbides in the heat affected zone near the weld, while the precipitation of the carbides may lead to intergranular corrosion in stainless steels in certain environments.

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