Chinas numbering rules adopt the use of element symbols and Chinese pinyin. Open hearth steel: P， boiling steel: killed steel: class a steel: T: Special: ball joint steel and spring steel， such as crm
7The specification and appearance quality shall comply with the provisions of gb- stainless steel seamless steel pipe. The steel pipe is usually ~ m long (indefinite length) hot rolled steel pipe， and the hot extruded steel pipe is equal to or greater than m. The wall thickness of cold drawn (rolled) steel pipe is . ~ mm， ~ m; the wall thickness is greater than mm， ~ m.
sThe recrystallization temperature changes with the shape variable. When the shape variable is %，316L stainless steel plate the recrystallization temperature drops to ℃，2mm thick stainless steel plateHow was it made and the recrystallization annealing temperature of cold deformed austenitic stainless steel is ~ ℃. At ℃， it needs to be kept warm for h， fully burned at ℃， and then water-cooled.
Allowable depth of straight track: for hot rolled and hot extruded steel pipes with diameter less than or equal to mm， it shall not be greater than % of the nominal wall thickness， and the large depth shall not be greater than .mm; for cold drawn (rolled) steel pipes， it shall not be greater than the nominal wall thickness
WWauIts alloy composition (chromium， nickel， titanium，316L stainless steel plate silicon， aluminum， etc.) and the internal structure of stainless steel coil plate are mainly composed of chromium. Chromium has high chemical stability， can form a passive film on the steel surface， isolate the metal from the outside， protect the steel plate from oxidation and increase the corrosion resistance of the steel plate. After the passivation film is destroyed， the corrosion resistance decreases.
Gk — The commonly used precipitation hardening stainless steel models， products and tens of millions of products are up to you to choose. It specializes in selling stainless steel plates， stainless steel coils， stainless steel belts and stainless steel tubes. The transaction is safe and secure. It is usually also called -% Cr and % Ni.
Manufacturing process of stainless steel pipe hot rolled (extruded seamless steel pipe): round tube blank & rarr; Heating → Perforation & rarr; Three roll cross rolling，316L stainless steel plate and the blank with a growth of about m shall be sent to the furnace for heating through the conveyor belt. The billet is sent to the furnace for heating at a temperature of about 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，2mm thick stainless steel plateHow was it made the more common piercer is cone roll piercer. This piercer has high production efficiency and good product quality. It specializes in selling stainless steel plate stainless steel coil， with high pressure resistance grade， good waterproof performance， fire and high temperature resistance， strong overload capacity， corrosion resistance， radiation protection， long service life，tisco stainless steel sheet,taigang stainless steel sheet,stainless steel sheet,stainless steel coil,stainless steel strip,stainless steel tube-TISCO Stainless Steel Co.,Ltd 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 extrusion. After extrusion， take off the pipe for sizing. The sizing machine rotates into the steel embryo at high speed through the conical drill 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 enters the cooling tower and is cooled by water spray. After cooling， the steel pipe will be straightened. After straightening， the steel pipe is sent to the metal flaw detector (or hydrostatic test) by the conveyor belt 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 by hand 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.
The selection of stainless steel plate shall consider the operating conditions， such as manual operation or automatic operation， the performance and type of hot press， and the quality requirements for materials， such as hardness， gloss， etc. Economic accounting should also be considered. Each time the steel plate is newly polished， stainless steel pipe， all metals react with oxygen in the atmosphere to form an oxide film on the surface. Unfortunately， the iron oxide formed on ordinary carbon steel continues to oxidize， expanding the corrosion and finally forming holes. The carbon steel surface can be guaranteed by electroplating with paint or oxidation resistant metals (e.g. zinc， nickel and chromium)， but as is known， this protection is only a thin film. If the protective layer is damaged， the steel below begins to rust.
AStainless steel capillary material: SUS / sus; Inner diameter mm-mm， polished. Purpose of stainless steel capillary: automatic instrument signal tube， automatic instrument wire protection tube; Precision optical ruler circuit， industrial sensor， electronic equipment circuit protection tube; Safety protection of electrical circuit， capillary protection of thermal instrument and internal support of air core high-voltage optical cable. Stainless steel capillary characteristics: it has good flexibility， corrosion resistance， tensile resistance， water resistance， and provides excellent electromagnetic shielding performance. Stainless steel hose can be bent into various angles and radius of curvature and has the same flexibility and durability in all directions; The stainless steel hose has flexible pitch， good flexibility and no blocking and stiffness; The stainless steel threading hose has certain tensile resistance between the side buckles of each section to prevent the damage of the hose from exposing the lines laid inside the hose. It is a special product manufacturing enterprise integrating R & D， sales and service. It has long been specialized in selling stainless steel plate， stainless steel coil and stainless steel strip Stainless steel pipe. The axial tension can withstand times of the nominal inner diameter. The yield strength of duplex stainless steel is more than twice that of ordinary austenitic stainless steel. This characteristic makes the designer reduce the weight when designing products， making this alloy more cost-effective than L. This alloy is especially suitable for - DEG; F/+° F temperature range. For applications beyond this temperature range， this alloy can also be considered， but there are some， especially for welded structures& middot; Pressure vessel， high pressure storage tank， high pressure pipeline， heat exchanger (chemical processing industry).
UVariable costThe folded stainless steel hot rolled strip is hot rolled into a strip with a thickness of mm-mm and a width of mm-mm.
yKSteel pipes also rust. I believe many friends will be surprised! I believe there are many people who dont know how to explain to customers! Next， lets popularize science!
Hydraulic test shall be conducted for the steel pipe bearing fluid pressure to test its pressure resistance and quality. It is qualified if there is no leakage or expansion under the specified pressure. Some steel pipes shall also be subject to crimping test， flaring test and flattening test according to the standard or the requirements of the demander.
; gt; %）. It means: times of Dr + iron loss value (iron loss value per unit weight when Hz repeated magnetization and sinusoidal magnetic induction intensity is T) + times of thickness value. For example， dr- indicates that the iron loss value is hot-rolled silicon steel plate with thickness of .mm. The grade of hot rolled silicon steel sheet for household appliances is expressed by JDR + iron loss value + thickness value， such as jdr-.
Inspection standardbThe shielding gas is argon with a purity of %. When the welding current is ~ a， the argon flow is ~ lmin， and when the current is ~ A， the argon flow is ~ lmin.
UStainless steel tube for boiler tube and heat exchanger (gjb- (yb-) aviation structural tube thick wall seamless steel tube (gjb- (yb-) aviation stainless steel tube (ybt-) (yb-) aviation a blind rivet seamless steel tube (gjb- (yb-) aviation structural tube， seamless steel tube (ybt)
As we all know， stainless steel pipe has a strong ability of atmospheric oxidation and is not easy to rust under normal circumstances， & ldquo; Stainless steel pipe & rdquo; Hence the name of. But what I want to tell you today is rust
o SPHDSPHD—& mdash; Hot rolled steel plate and strip for stamping.
eF — High strength cutting tool steel， slightly higher carbon content， after appropriate heat treatment
— General model; stainless steel. The GB brand is CrNi.