Let PS be the external force at the yield point s and fo be the cross-sectional area of the sample， then the yield point & sigma; S = PS / fo (MPA)， MPa is called MPa， equal to n (Newton) / mm (MPA = pa， PA: Pascal = n / M
4According to the purpose， it is mainly divided into oil well pipe (casing，310S stainless steel pipe oil pipe and drill pipe)，Cold rolled stainless steel stripIntroduction to common technologies of hardening treatment pipeline pipe boiler pipe， mechanical structure pipe， hydraulic prop pipe， gas cylinder pipe， geological pipe， chemical pipe (high-pressure fertilizer pipe， petroleum cracking pipe) and marine pipe. Calculation formula for weight of stainless steel square tube: (nozzle perimeter - actual thickness) actual thickness is .， of which . is a constant converted from stainless steel density.
uThe recrystallization temperature changes with the shape variable. When the shape variable is %， the recrystallization temperature drops to ℃，310S stainless steel pipe 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.
GAyutepkeAfter the pipeline is installed and the pressure test is qualified， it is better to wash with low chloride ion water and disinfect with .% potassium permanganate.
Rv(VI) the growth rate of fixed asset investment in the iron and steel industry dropped significantly. From to June， the investment in fixed assets in the iron and steel industry was . billion yuan， a year-on-year increase of %， of which the investment in ferrous metal smelting and rolling was . billion yuan， a year-on-year increase of %， down percentage point from the same period in ; The investment in ferrous metal mining and dressing was . billion yuan，310S stainless steel pipe a year-on-year increase of %， and the growth rate fell sharply by percentage points.
If you want to choose a high-quality stainless steel pipe water supply pipe，Cold rolled stainless steel stripIntroduction to common technologies of hardening treatment 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 and smooth， and the incision is smooth. There will be obvious differences in material between the advantages and disadvantages of stainless steel pipe water supply pipe.
The 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.
xGood ductility， used for forming products. It can also be hardened rapidly by machining. Good weldability. Wear resistance and fatigue strength are better than stainless steel.
YCheck the clamping forming effect after each clamping， and there shall be no clamping in place or serious depression of pipe clamping. According to visual inspection，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 the pipe fitting end and the pipe are tightly bonded. The smaller the diameter of the diamond edge of the pipe fitting above DN is slightly smaller than the outer diameter of the pipe， ranging from .-mm. The larger the pipe diameter， and the convex ring of the pipe fitting needs to be put into the groove of the jaw for clamping. In order to prevent operation， the operator can only stand on the axis of the pipe， not on the left and right sides of the tong head.
fVHowever， some people will still ask whether our stainless steel pipes can be used as water pipes through online communication or telephone communication.
It has excellent stress corrosion cracking resistance. Even duplex stainless steel with low alloy content has higher stress corrosion cracking resistance than austenitic stainless steel， especially in the environment containing chloride ions. Stress corrosion is a prominent problem that ordinary austenitic stainless steel is difficult to solve.
Carbon structure delivery status: delivered in heat treatment (annealing， normalizing， tempering after normalizing， it is mainly divided into oil well pipe (casing， oil pipe and drill pipe)， pipeline pipe， boiler pipe， mechanical structure pipe， hydraulic prop pipe， gas cylinder pipe， geological pipe， chemical pipe (high-pressure fertilizer pipe， petroleum cracking pipe) and marine pipe. Calculation formula for weight of stainless steel square tube: (nozzle perimeter - actual thickness) actual thickness is .， of which . is a constant converted from stainless steel density.
HThe scale pretreatment of stainless steel pipe makes the scale loose， 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， the parts basket shall be lifted into the tank， stopped above the horizontal plane， closed the tank cover， and then lowered into the water ， s stainless steel pipe and L stainless steel pipe， the performance is stable， safe reliable and maintenance free. The technical level has reached the domestic level and the international advanced level of similar products until inundation.
SPHCSPHC—& mdash; In the first place， s is the abbreviation of steel， P is the abbreviation of plate， h is the abbreviation of hot heat， and C is the abbreviation of commercial. It generally represents hot-rolled steel plate and strip.
pCompared with traditional steel， stainless steel can not only ensure high strength and weight ratio， but also have good plasticity， toughness， formability and weldability. It is the first choice for car frame. Stainless steel with superior performance can create cars with light weight， strong resistance， but also save resources. And some other auto parts are also made of stainless steel. Stainless steel has a great potential market in the whole automobile industry!
eIIf the thickness of the steel plate is not enough， the professional sales of stainless steel plate， stainless steel coil， stainless steel belt and stainless steel pipe are strictly tested and the quality is guaranteed. The preferential activities are in progress. Welcome to consult. It is easy to bend， which will affect the production of decorative plate. If the thickness is too large and the steel plate is too heavy， but also bring unnecessary difficulties to the operation. At the same time， the allowance that should be left during processing or use of stainless steel plate shall also be considered. The thickness of copper plate is not absolutely consistent but the thickness of the same steel plate shall be as consistent as possible. Generally， for medium-sized saw plate， the thickness tolerance is .-.mm. If the requirements are too strict， the grinding cost will also increase. Generally， it is a structural steel plate with high resistance and hardness. The greater the mechanical damage resistance， the longer the service durability， but the grinding and processing cost is also relatively high.
However， stainless steel is relative， and it is just ordinary stainless steel. Its better not to use it in a particularly polluted environment. You can rest assured to use stainless steel pipes in your daily life.