1 inch stainless steel pipeRelief of financial pressure

announcer:hp717HP127443542 release time:2022-02-27 14:31:39

Spcespce & mdash; & mdash; refers to cold-rolled carbon steel sheet and strip for deep drawing, equivalent to China 08Al (52) 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, 1 / 8 hard is 1 / 4, hard is 1 / 2, hard is 1. 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.

The steel strip can be delivered without heat treatment under the condition that all properties meet the standard requirements. Ordinary drawing grade steel strip is allowed to be delivered without heat treatment.

.Rockwell hardness the Rockwell hardness test of stainless steel pipe is the same as Brinell hardness test. The difference is that it measures the depth of indentation. Rockwell hardness test is widely used at present, and HRC is second only to Brinell hardness Hb in steel pipe standards. Rockwell hardness can be used to measure metal materials from very soft to very hard, which makes up for the disadvantage of Brinell method, It is simpler than Brinell method and can read the hardness value directly from the dial of the hardness machine. However, due to its small indentation, the hardness value is not as accurate as Brinell method.

(III) steel exports grew rapidly. The supply and demand of domestic steel market is unbalanced, and the export of enterprises. From January to June, a year-on-year increase of 6%; 6.83 million tons of steel were imported, down 8%, and 320000 tons of billets and ingots were imported, up 50%. Converting billets into crude steel, the cumulative net export was 25.06 million tons, a year-on-year increase of 13%, accounting for 4% of China's crude steel output. In terms of export price, the average export price of bars and wires from January to June was 623 US dollars per ton, a year-on-year decrease of 18%; US $832 tons of plate, a year-on-year decrease of 8%.

.Stainless steel has the ability of atmospheric oxidation that is, it also has the ability of corrosion resistance in the medium containing acid it does not rust. At the same time, alkali and salt, that is corrosion resistance. However, its corrosion resistance changes with its own chemical composition, mutual state, service conditions and environmental medium type. For example, 304 has absolutely excellent corrosion resistance in dry and clean atmosphere, but it is moved to In coastal areas, in the sea fog with a lot of salt, it will soon rust, while 316 stainless steel performs well. Therefore, material certificate (Baogang material), Japan Nippon Steel Material Certificate (Nippon Steel material),Stainless steel water pipe 304, SGS report, etc. can be provided.

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, oxygen atoms in the air or will continue to separate out, forming loose iron oxide. For a long time, stainless steel plate, stainless steel coil and stainless steel belt will be provided, Stainless steel pipe, a 20-year-old brand, has advantages in price and guaranteed quality! The metal surface is constantly corroded


1 inch stainless steel pipeRelief of financial pressure



Process performance inspection: flattening test, tensile test, impact test, flaring test, hardness test, metallographic test, bending test and nondestructive testing (including eddy current testing, X-ray testing and ultrasonic testing).

Adjust the ratio of austenite forming elements to ferrite forming elements in the steel to make it have austenite + ferrite dual phase structure, in which ferrite accounts for 5% - 12%. This dual phase structure is not easy to produce intergranular corrosion.

The national standard thickness of stainless steel pipe mainly depends on the thickness of raw materials and processing technology. The thickness of welded pipe is basically the same as that of raw materials. For seamless pipe, it is slightly thinner than that of raw materials. At present, the stainless steel pipe industry is dominated by large negative difference, mainly for the consideration of cost saving, 0 thickness. It provides all kinds of stainless steel plates, stainless steel coils, stainless steel belts, stainless steel pipes for individuals and enterprises all over the country for a long time, on-site settlement and honest operation. There are offices all over the country for long-term cooperation. Generally, there will be 0.91 ~ 1.

Test method.Hot rolled stainless steel tubes are generally produced on automatic tube rolling mills. After inspection and removal of surface defects, the solid pipe blank is cut into the required length, centered on the end face of the perforated end of the pipe blank, and then sent to the heating furnace for heating and perforated on the piercer. During perforation, it rotates and advances continuously. Under the action of roll and plug a cavity is gradually formed inside the pipe blank, which is called rough pipe. Then it is sent to the automatic pipe mill to continue rolling. After that, the wall thickness of the whole machine is adjusted, and the diameter is determined by the sizing machine to meet the specification requirements. It is advanced to produce hot rolled seamless steel pipe by continuous pipe mill.

Cold rolled oriented silicon steel strip (sheet) represents: 100 times of DQ + iron loss value (at the frequency of 50Hz, the waveform is sinusoidal, and the magnetic induction peak value is the unit weight iron loss value of 7T) + 100 times of thickness value. Sometimes, G is added after the iron loss value to represent high magnetic induction. For example,High hardness stainless steel strip, dq133 represents cold rolled oriented silicon steel strip (sheet) with iron loss value of 3 and thickness of 0.3mm. Now the new model is 30q133.

(II) The price of steel has been running at a low level. From January 31 to June 2012, the overall performance of the domestic steel market was depressed. With the substantial release of crude steel production capacity the market supply and demand fell into an imbalance, and the steel price entered a downward channel, which has been weak for more than four months. As of June 26, 2013, the steel price index had dropped to 100.48 points, lower than the first 6 points. The prices of eight steel varieties mainly counted by the iron and steel industry association were lower than the first 6 points


1 inch stainless steel pipeRelief of financial pressure



The main function of chromium is the organizational structure of. 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, the corrosion resistance decreases.

original.The two ends of the 6m long steel pipe are mechanically cut, and the pipe end is relatively sharp to prevent direct contact with the sealing ring of the pipe fitting. It is necessary to cut off a small section at both ends of the pipe or grind off the corner edge with a hand grinder, and then clamp the pipe fittings.

Stainless steel pipe is durable and has been recognized by the engineering community, and relevant parties are starting from reducing the wall thickness and lowering the grid, the price of stainless steel pipe is not high, so the supporting connection, the reliability and price of pipe fittings are the main factors determining its development. Domestic developers have independently developed connection technology and pipe fittings in Sichuan, Guangdong, Zhejiang, Jiangsu and other places, the upper and lower jaw are fixed modules, China's stainless steel industry needs to improve, but it is important for China's stainless steel industry to continuously improve its quality level and comprehensively upgrade.

Fabrication of stainless steel pipe

Hot rolled silicon steel sheet hot rolled silicon steel sheet is represented by Dr, which is divided into low silicon steel (silicon content & le; 8%) and high silicon steel (silicon content & amp; gt; 8