Characteristics and application 347h austenitic stainless heat strength steel has good corrosion resistance, welding performance and heat strength performance. 347h stainless steel is used for large boiler superheater, reheater, steam pipeline and petrochemical heat exchanger pipe fittings.
There are ba face, 2b face, (white skin), 2D face, (frosted), 8K face and other surfaces with good quality and brightness.
.Therefore, the field with high utilization rate of stainless steel with high competitiveness and comprehensive quality will also be an important part of the plan.
L stainless steel pipe has become a very popular material in the market because of its many advantages. Today, Xiaobian will tell you in detail about L stainless steel pipe installation technology.
.If you want to choose a high-quality stainless steel pipe water supply pipe, you should first see whether its material is superior. Stainless steel is a material with strong corrosion resistance and high sanitation and cleanliness. Not only the outer wall is very beautiful, but also very smooth. There will be obvious differences in material first in terms of incision and whether the stainless steel pipe water supply pipe is good or bad.
Stainless steel water supply pipe is a healthy, economic, sanitary and energy-saving water pipe, whether it is for household or large engineering buildings
— After that, the second widely used steel is mainly used in food industry and surgical equipment. Molybdenum is added to obtain a special corrosion-resistant structure. Because it has better chloride corrosion resistance than it, it is also made & ldquo; Marine Steel & rdquo; To use. SS is usually used in nuclear fuel recovery units. Grade 1810 stainless steel generally meets this application grade.  Model 321 & mdash; Except that the risk of weld corrosion of the material is reduced due to the addition of titanium, other properties are similar.
·Cargo box of ship or truck & middot; Food processing equipment standard ASTM / ASME......... A240 UNS S3 / s31803euronorm......... 4462 x2crnimon 23afnor.................. Z3 CrNi 205 azdin.............................. W. NR 4462 corrosion resistance uniform corrosion due to chromium content (22%), molybdenum (3%) and nitrogen content (0
Combined steel and spring steel, such as 20CrMnTi 60simn, (C content is expressed in ten thousandths).
Both ends of the steel pipe shall be cut into right angles and burrs shall be removed.
knowledge.3 after deep drawing, small black spots and RI high imitation dging will also appear on the surface of the area with large deformation, which will affect the BQ attribute.
347h chemical composition carbon C: Manganese Mn: silicon Si: chromium Cr: nickel Ni: phosphorus P: sulfur s: niobium NB: 347h stainless steel Name: austenitic stainless steel standard: aisastm model: 347huns No.: Note: a single value is a high value unless otherwise indicated; when used in some pipe making processes, the nickel content of some models of austenitic stainless steel must be slightly higher than that shown in the table; optional High TA content is 0.10%; high content is 0.75%; high content is the basic characteristics of stainless steel, with high temperature strength and high temperature plasticity excellent oxidation resistance and corrosion resistance, good structural stability, uniform chemical composition, good processing performance and welding performance, high dimensional accuracy and surface quality. 5 causes of rust when brown spots appear on the surface of stainless steel They were greatly surprised: & rdquo; stainless steel will not rust. Rust is not stainless steel. There may be something wrong with the steel quality. & rdquo; in fact this is a one-sided wrong view of the lack of understanding of stainless steel. Stainless steel will also rust under certain conditions
In order to obtain seamless pipes with smaller size and better quality, cold rolling, cold drawing or a combination of both must be used. Cold rolling is usually carried out on a two high mill. The steel pipe is rolled in an annular pass composed of variable section circular groove and fixed conical plug. Cold drawing is usually carried out on a single chain or double chain cold drawing machine of 0.5 ~ 100t.
Stainless steel is a very thin, firm, fine and stable chromium rich oxide film (protective film) formed on its surface. It prevents oxygen atoms from penetrating and oxidizing, and obtains corrosion resistance. Once this film is continuously damaged for some reason, forming loose iron oxide. For a long time, stainless steel plate, Stainless steel pipe, a 20-year-old brand, has advantages in price and guaranteed quality! The metal surface is constantly corroded
how.The stainless steel strip is supplied in coils, also known as strip steel. It is divided into hot rolling and cold rolling, as well as ordinary steel strip and high-quality steel strip. There are many kinds of stainless steel belts! Wide use! There are: 201 stainless steel belt 202 stainless steel belt, 304 stainless steel belt, 301 stainless steel belt, 303 stainless steel belt, 316 stainless steel belt, J4 stainless steel belt, 309S stainless steel belt, 316L stainless steel belt, 317L stainless steel belt, 310S stainless steel belt,What is the outer diameter of 25 stainless steel pipe, 430 stainless steel iron belt, etc! Thickness: 0.02mm-4mm, width: 5mm-1550mm, can be customized without standard!
Assembly: the sealing ring shall be correctly installed in the U-groove of the pipe fitting, put the pipe into the socket of the pipe fitting and wait for crimping.
Hydraulic saw grinding disc (manual saw wire cutting machine).
.Manufacturing process hot rolling (seamless steel pipe): round tube blank → Heating → Perforation & rarr; Three roll cross rolling continuous rolling or → Off pipe & rarr; Sizing (or reducing) → Cooling → Straightening & rarr; Hydrostatic test (or flaw detection) → Mark & rarr; The raw material for warehousing and rolling seamless pipe is round pipe blank. The round pipe blank shall be cut and processed by cutting machine, and the blank with a growth of about 1m shall be brought to the furnace for heating. The billet is sent to the furnace for heating at a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. The temperature in the furnace is the key problem. After the round tube billet is discharged from the furnace, it should be pierced through the pressure piercer. Generally, the more common piercer is the cone roll piercer. This piercer has high production efficiency and good product quality. It is specialized in stainless steel plate stainless steel coil, stainless steel belt and stainless steel pipe, with high pressure resistance grade, good waterproof performance,316L thick wall stainless steel pipe, fire and high temperature resistance, strong overload capacity,Stainless steel pipe 316L, corrosion resistance, radiation protection, long service life, large perforation diameter expansion, and can wear a variety of steel grades. After perforation, the round tube blank is successively rolled by three roll cross rolling, continuous rolling or rolling. Take off the pipe after sizing. The conical drill bit of the sizing machine rotates into the steel embryo at high speed to form a steel pipe. The inner diameter of the steel pipe is determined by the outer diameter length of the sizing machine bit. After sizing, the steel pipe will be straightened. After straightening, the steel pipe is sent to the metal flaw detector (or hydrostatic test) for internal flaw detection. If there are cracks, bubbles and other problems inside the steel pipe, they will be detected. Steel pipes should be strictly selected manually after quality inspection. After the steel pipe is inspected, the number, specification, production batch number, etc. shall be sprayed with paint. And hoisted into the warehouse by crane.
In order to protect the welding pool well with argon and facilitate the welding operation, the center line of tungsten electrode and the workpiece at the welding position shall be kept 80 ~ 85° Angle, the included angle between filler wire and workpiece surface shall be as small as possible, generally 0-DEG; about.
mdash; Martensitic precipitation hardening stainless steel.