Typical ferritic stainless steels are Crl, Cr and Cr.Hardness test: annealed stainless steel pipes with inner diameter of more than mm and wall thickness of less than mm can be tested by w-b Vickers hardness tester, which is very fast and simple, Rockwell hardness tester shall be used to test HRC hardness. Stainless steel pipes For stainless steel pipes with inner diameter greater than mm and wall thickness less than mm, the surface Rockwell hardness tester shall be used to test HRT or hrn hardness. For stainless steel pipes with inner diameter less than mm and greater than mm, the special Rockwell hardness tester for pipes shall be used to test hrt hardness. When the inner diameter of stainless steel pipes is greater than mm the Rockwell or surface Rockwell hardness tester can also be used to test the hardness of pipes.Barahona,Both ends of the steel pipe shall be cut into right angles and burrs shall be removed.Ferritic and martensitic stainless steels are represented by series numbers. Ferritic stainless steel is marked with and , martensitic stainless steel is marked with and C, dual phase (austenite ferrite).Al Badari,At present stainless steel backing is divided into two processes: back argon filling and non argon filling. Back argon filling protection can be divided into solid wire + TIG process and solid wire + TIG + water-soluble paper process; The back non argon filling protection is also divided into flux cored wire backing welding and welding rod (flux coated wire) backing TIG welding.AUSTENITIC FERRITIC duplex stainless steel on the basis of austenitic stainless steel, appropriately increase Cr content and reduce Ni content, and cooperate with remelting treatment. High prices, various specifications of stainless steel plates, stainless steel coils stainless steel belts and stainless steel tubes are supplied in time and cost-effective. It has become the preferred brand for many wire products. Welcome to buy! Stainless steel with duplex structure of austenite and ferrite (including ~ % & Delta; - ferrite) can be obtained. Typical steel grades include crniti, CrNiTi, ocrnimoti, etc. Duplex stainless steel has good weldability, no heat treatment is required after welding, and its tendency of intergranular corrosion and stress corrosion is also small. However, due to the high Cr content, it is easy to form & sigma; Pay attention when using.Accounting for about % - % of the total steel, so it has also become an important material in various machinery and building structures. Stainless steel is used Under the condition of equal weight the steel pipe has large section coefficient and high flexural and torsional strength, the structure and components formed by pipe have a larger section modulus than solid parts. Therefore, stainless steel pipe itself is an economic section steel that saves metal. It is an important part of steel, especially in oil drilling, production and metallurgy

Model & mdash; It has better temperature resistance.Theoretical weight: Cr Ni austenitic stainless steel austenitic stainless steel (kg / M) s-wall thickness (mm)Section shape stainless steel pipe can be divided into round pipe and special-shaped pipe according to the section shape. Special shaped tubes include rectangular tubes, rhombic tubes, elliptical tubes, hexagonal tubes, octagonal tubes and various cross-section asymmetric tubes. Special shaped pipe is widely used in various structural parts, tools and mechanical parts. Compared with circular pipe, special-shaped pipe generally has large moment of inertia and section modulus, and has large bending and torsion resistance,Barahona310S stainless steel industrial pipe, which can greatly reduce the structural weight and save steel.how much,Stress corrosion cracking (SCC) refers to the cracking caused by the combined action of stress corrosion stress (mainly tensile stress) and corrosion of austenitic stainless steel Austenitic stainless steel is prone to stress corrosion in corrosive media containing chloride ions. When the Ni content reaches % - %, it is a long-term enterprise engaged in stainless steel plate, stainless steel coil,BarahonaRefractory stainless steel plate, stainless steel belt and stainless steel pipe. Welcome to consult. The stress corrosion tendency of austenitic stainless steel is very large. Continue to increase the Ni content to ~ %,BarahonaThickness of stainless steel pipe, and the stress corrosion tendency gradually decreases until it disappears.Application: utility boiler industry, mainly in key parts such as high temperature section of superheater and reheater.Austenitic stainless steel is generally used for manufacturing and manufacturing chemical equipment components, low-temperature equipment components in refrigeration industry, and can be used as stainless steel spring and clock spring after deformation strengthening.

Proper heat treatment process can prevent intergranular corrosion and obtain excellent corrosion resistance.Scheme customization,Add a small amount of sulfur and phosphorus to make it easier to cut.Spcespce & mdash; & mdash; refers to cold-rolled carbon steel sheet and strip for deep drawing, equivalent to China Al () deep drawing steel. If it is necessary to ensure non aging property, add n at the end of the brand as spcen. Quenching and tempering code of cold-rolled carbon steel sheet and strip: annealing status is a, standard quenching and tempering is s, / hard is / , hard is / , hard is . Surface processing code: dull finish rolling is D, bright finish rolling is B. spcc-sd represents cold-rolled carbon sheet generally used for standard quenching and tempering and matt finish rolling. Another example is spcct-sb It refers to cold-rolled carbon sheet with standard quenching and tempering and bright processing and required to ensure mechanical properties.Model & mdash& ldquo; Cutting tool level & rdquo; Martensitic steel, an early stainless steel similar to Brinell high chromium steel. It is also used for surgical tools, which can be made very bright. Model & mdash; Ferritic stainless steel for decoration, such as automotive accessories. Good formability, but poor temperature resistance and corrosion resistance.Barahona,Duplex stainless steel product description: This stainless steel has good corrosion resistance in urea carbamate solution and high stress corrosion cracking resistance in chloride environment. At the same time, the duplex stainless steel has excellent mechanical properties and can be used in plant construction with high safety requirements.Some reasons for product composition ratio: in order to reduce the production cost, reduce the proportion content of some important elements such as chromium and nickel, and increase the content of other elements such as carbon. This production phenomenon that the composition ratio is not strictly in accordance with the product model and product characteristics not only greatly reduces the product quality, for example, when the chromium content of stainless steel pipe is insufficient, it not only affects the production The corrosion resistance and formability of products have potential product quality and safety hazards when they are used in chemical, equipment and production industries. At the same time, they also affect the appearance and oxidation resistance of products.Inspection: after crimping, check the crimping size with a special gauge.