Ishoj317 stainless steel welded pipePerformance comparison
release time:2024-07-10 17:39:26

Editor's note on the causes of steel rusting: chloride ions exist widely, such as salt,Ishoj304L stainless steel pipe manufacturer, sweat stains, seawater, sea breeze, soil, etc. stainless steel corrodes rapidly in the presence of chloride ions, even surpassing ordinary low-carbon steel. Chloride ions form complexes with Fe in alloy elements, reducing the positive potential of Fe, and then being stripped of electrons and oxidized [].Therefore, there are requirements for the service environment of stainless steel, and it is necessary to remove dust frequently and keep it clean and dry.Ishoj,Origin: domestic and imported (Sweden, Japan, Finland, South Korea, South Africa and Taiwan); classified according to the thickness of thin plate (.mm-mm), medium plate (mm-mm), thick plate (mm-mm) and extra thick plate according to the production of hot-rolled steel plate and cold-rolled steel plate according to the tableThere are mechanical, chemical and electrochemical methods to remove the scale of stainless steel pipe. Due to the complexity of the composition of the scale of stainless steel pipe, it is not easy to remove the scale on the surface and make the surface highly clear and flat. Generally,Several kinds of stainless steel backing welding used for stainless steel backing welding usually adopt TIG process. According to the actual situation of the site, professional L stainless steel pipe, s stainless steel pipe, L stainless steel pipe and other special products, old brands, with advantages in price and guaranteed quality. We can use the following four kinds of backing welding.The scale pretreatment of stainless steel pipe makes the scale loose, and then acid pickling is carried out for easy removal. The pretreatment can be divided into the following: alkaline salt melting treatment method. The alkaline melt contains % hydroxide and % salt. The proportion of the two in the molten salt shall be strict, so that the molten salt has strong oxidizing power low melting point and small viscosity. Only the sodium halo shall be analyzed in the production process, and the content shall not be less than % (wt) It is treated in a salt bath furnace at ~ ℃ for minutes for ferritic stainless steel and minutes for austenitic stainless steel. Similarly, iron oxides and spinels can also be oxidized by salt to become loose ferric oxide, which is easy to be removed during acid pickling. Due to the action of high temperature, some of the formed oxides peel off and sink to the furnace bottom in the form of sediment. Alkaline salt melting pretreatment Process flow: steam degreasing → preheating ( ~ ℃, time ~ min) ↠ molten salt treatment & rarr; water quenching & rarr; hot water washing. Molten salt treatment is not suitable for assemblies with weld gap or crimping. When the parts are taken out of the molten salt furnace, a stream of alkali and salt mist will be splashed during water quenching, so deep well anti splash water quenching tank shall be used during water quenching. During water quenching, firstly lift the parts basket into the tank, stop above the horizontal plane, close the tank cover, and then lower the parts basket into the water, Professional L stainless steel pipe, s stainless steel pipe and L stainless steel pipe are stable, safe reliable and maintenance free. The technical level has reached the domestic level and the international advanced level of similar products until submerged.Crimping: during crimping, and the jaw is perpendicular to the pipe axis.


Ishoj317 stainless steel welded pipePerformance comparison



Vickers hardness stainless steel pipe Vickers hardness test is also an indentation test the convex part of the pipe fitting is placed in the concave groove of the die, which can be used to determine the hardness of very thin metal materials and surface layers. It has the main advantages of Brinell and Rockwell methods and overcomes their basic disadvantages, but it is not as simple as Rockwell method. Vickers method is rarely used in steel pipe standards.The heat-treated alloy should be DEG at low temperature; Annealing treatment at the temperature of F then rapid cooling and water quenching. This treatment is applied to solid melt annealing and stress relief. Stress relief treatment, such as below DEG; F, which is easy to lead to the precipitation of harmful metal or non-metallic phases.Hardness stainless steel pipes are usually measured by Brinell, Rockwell and Vickers hardness indexes.Create brilliance,The American Iron and Steel Institute uses three digits to identify various standard grades of malleable stainless steel. Among them, austenitic stainless steel is marked with numbers of and series. For example, some ordinary austenitic stainless steel is marked with and.Therefore,IshojS30408 stainless steel pipe, there are requirements for the service environment of stainless steel, and it is necessary to remove dust frequently and keep it clean and dry.The back is blocked with blocking plate for ventilation protection; Only soluble paper or the combination of soluble paper and blocking plate is used for blocking ventilation protection; Use flux cored wire for backing TIG welding.


Ishoj317 stainless steel welded pipePerformance comparison



Standard classification - classification: national standard GB industry standard Yb local standard enterprise standard qcb- classification: product standard packaging standard basic standard - standard level (divided into three levels): y level: international advanced level I level: international general level H level: domestic advanced level - national standard: stainless steel bar (level I) gb- stainless welding disc Park (level H)Quality assurance,Stainless steel pipe factory stainless steel products are widely used in hardware products, furniture, mechanical structure, mechanical accessories, precision medical instruments, fluid transmission pipelines, such as furniture, machinery, medical oil,IshojStainless steel polished tube, water, gas, steam and other industries.Process performance inspection: flattening test, tensile test, impact test, flaring test, hardness test, metallographic test, bending test and nondestructive testing (including eddy current testing, it should be noted that the water-soluble paper should be double-layer and must be pasted well, otherwise it is easy to cause damage and fall off of the water-soluble paper, resulting in loss of argon protection of the inner weld and oxidation, which can not ensure the welding quality and seriously affect the construction period. Therefore, the water-soluble paper should be strictly checked and pasted before welding.Ishoj,Bidirectional Product Description: the tensile strength of the material is ~ mpa, and the high working temperature can reach ℃.Application: utility boiler industry, mainly in key parts such as high temperature section of superheater and reheater.Several kinds of stainless steel backing welding used for stainless steel backing welding usually adopt TIG process. According to the actual situation of the site professional L stainless steel pipe, s stainless steel pipe, L stainless steel pipe and other special products, old brands, with advantages in price and guaranteed quality. We can use the following four kinds of backing welding.

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