Maoming Cr5Mo1V alloy steel plate brand in tensile test, Maoming 65mn manganese spring plate, the length of the gauge after the sample is broken, the percentage of the length of the original gauge length is called the elongation. Expressed as σ, the unit is%. The calculation formula is: In the formula: L1-gauge length after the sample is broken, mm; L0-original gauge length of the sample, mm. Discount Maoming seamless steel plate for fluid transportation (GB / T8163-199 is a general seamless steel plate used to transport water, oil, gas and other fluids. 20G alloy plate seamless steel plate for low and medium pressure boilers (GB3087-199 is used for various This kind of high-quality carbon structural steel used for low and medium pressure boiler superheated steam plate, boiling water plate and locomotive boiler superheated steam plate, big smoke plate, small smoke plate and arch brick plate is hot rolled and cold drawn (rolled) seamless steel plate. Integrity service "galvanized welded steel plate for low-pressure fluid transportation" (GB / T3091-199 also known as galvanized welded steel plate, commonly known as whiteboard). It is a hot-dip galvanized welded (furnace or electric welding) steel plate for transporting water, Gas, air oil, heating steam, warm water and other low-pressure fluids or other uses. The thickness of the steel plate can be divided into ordinary galvanized steel and thick galvanized steel. The specification is expressed by the nominal diameter (mm), which is the approximate value of the inner diameter. The spiral submerged arc welded steel plate (SY5036-8) of 20g alloy plate for pressure fluid transportation is usually expressed in inches. Submerged arc welding It is used for conveying spiral seam steel plate under pressure fluid. The steel plate has strong pressure bearing capacity and good welding performance. After various rigorous scientific tests, it is safe and reliable to use. The large diameter of the steel plate and high conveying efficiency save the investment of laying plate lines. Mainly It is used to transport oil and natural gas. Whether the Nu River is boiling or not. Boiling is a fire bed, in the critical state when the ventilation speed of the air sent from the bottom to the top of the furnace reaches the coal particle sedimentation speed. At this time, the coal particles are lost. The stability moves in a strong boiling state in the coal seam of the furnace, and the process of coal is on the other hand. The high-quality blown steel technology is also a relatively high-end technology abroad. In general, 12cr1mov seamless steel plate can be used in this way. For the subsequent 12cr1mov seamless steel plate market, it also has a definite role. In addition, we must go to as much technical practice as possible to understand the current status and trends of 12cr1mov seamless steel plate technology. Wall thickness steel plate outer diameter ≤ 31, the allowable deviation of wall thickness Press + 20%, -0; When the outer diameter of the steel plate is> 3, the allowable deviation of the wall thickness is + 22%, -0; The outer diameter is according to the ASME SA-450 outer diameter and wall thickness deviation. According to GB5310 requirements Allowable deviation (mm) Steel plate outer diameter (mm) General accuracy Advanced accuracy ≤ 30 ± 0.20mm ± 0.20mm 30-50 ± 0.30mm ± 0.25mm> 50 ± 0.8% ± 0.6% Wall thickness (greater than 3mm) ± 10% ± 5% comparison and application of the two standards The actual outer diameter is higher according to the ASME standard, and the wall thickness is higher according to the GB5310. When grinding, the main consideration is whether the allowable deviation of the outer diameter meets the standard requirements, and the thickness after grinding is You can use an ultrasonic thickness gauge to measure and determine whether the thickness of the steel plate after grinding exceeds the standard according to the measured thickness. Maoming Cr5Mo1V alloy steel plate brand is currently in order to produce a better 12cr1mov seamless steel plate, now 12cr1mov seamless steel plate is good The technology has also reached the technology of blowing steel, and the effect is very obvious. To trace the development of blown steel technology, this has a long history. In the 1960s, Japan was a combination of Austria's oxygen top-blown steelmaking technology, French blast furnace heavy oil technology, and the high temperatures of the United States and the Soviet Union. On the basis of high-pressure technology, German steelmaking deoxidation technology, Swiss continuous steel casting technology, and American rail technology, the converter gas recovery technology has been created, forming the world's top steel technology. The analysis project needs to point out that in practice, the ideal ratio of steel grit and steel shot in the abrasive is difficult to achieve, because the hard and brittle steel grit has a higher crushing rate than the steel shot. Therefore, during use, the mixed abrasive should be continuously sampled and tested. According to the particle size distribution, a new abrasive is added to the rust remover, and the amount of steel grit is the main component of the new abrasive. Excellent quality
To avoid water shortage, Maoming Cr5Mo1V alloy steel plate brands should start with strengthening the board management, strengthen ideological education and technical training, establish a responsibility system for posts, and strengthen the maintenance of accessories such as water level gauges to ensure that the water level in the drum is normal. In view of the complex and changeable boiler plate overflow, stress, and aging conditions, and the difficulty of life evaluation, domestic breakthroughs have been made in the related basic technology research of life plate management. The main new technology research progress includes: Preventive technology research, Maoming Cr5Mo1V alloy steel plate, development of boiler plate failure analysis system. ABS alloy plates and special cold melt adhesives are among them widely used in building water supply and central air conditioning, especially in building water supply risers and central air conditioning panels. PC / ABS alloy plates can also be automotive exterior parts, such as automobile wheel covers, Mirror housing, tail light cover, etc. Most people are unfamiliar with lifting boilers. Let's first understand the boiler: a boiler is a facility that uses the heat of fuel or other power to heat water to change hot water or steam. Boiler plate refers to the steel that is open at both ends and has a hollow section. Its length is larger than that of the surrounding steel. It can be divided into seamless steel plates and welded steel plates. The working fluid (such as feedwater) entering the boiler is absorbing heat and vaporizing. The heat receiving surface is called the boiler boiling heat receiving surface. There is no boiling heat receiving surface in the hot water boiler and supercritical alloy plate, and the water-cooled wall is used as the radiation receiving surface of the heating medium. The boiler boiling heat receiving surface is mainly a water-cooled wall that attracts radiant heat in the hearth, which is called the radiating boiling heat receiving surface. The 20G alloy plate is in the alloy plate. Because the water-cooled wall does not meet the needs of the vaporization heat of the entire working fluid, it is necessary to arrange a boiler plate in the flow channel to attract the transmission of thermal energy. . The other is to teach the slag board in the middle and low pressure boilers for the boiling surface. The slag board teaching is composed of "pulling thin" at the chimney at the entrance of the water-cooled wall behind the hearth, and its role is to cover the entrance of the hearth without blocking the slag from flowing through the heater. At present, in order to produce better 12cr1mov seamless steel plates, now the good technology of 12cr1mov seamless steel plates has also come to blow steel technology, and the effect is very obvious. To trace the development of blown steel technology, this has a long history. In the 1960s, Japan was a combination of Austria's oxygen top-blown steelmaking technology, French blast furnace heavy oil technology, and the high temperatures of the United States and the Soviet Union. On the basis of high-pressure technology, German steelmaking deoxidation technology, Swiss continuous steel casting technology, and American rail technology, the converter gas recovery technology has been created, forming the world's top steel technology. In addition, there are certain requirements for the microstructure, grain size, and decarburization layer of the finished steel sheet. GB3087-2008 "Seamless steel plate for low and medium pressure boilers". The tensile test is in accordance with GB / T228-8, the hydrostatic test is in accordance with GB / T241-90, the flattening test is in accordance with GB / T246-9, the flaring test is in accordance with GB / T242-9, and the cold bending test is in accordance with GB244-97. Maoming's intermediate demand has shifted from contraction to expansion, increasing the degree of improvement in supply and demand, and market expectations have changed. Confidence has increased significantly, not only in the residential market, but also in the entire steel industry chain. Now people are generally optimistic about the market outlook and think that the bad times have passed. This optimism governs business decisions, so manufacturers and traders will cautiously replenish stocks, raise prices, reluctant to sell, and speculative behavior, resulting in intermediate demand. If progress rises, the above behavior will be even more daring, and it will also trigger sexual "buy-in" for low-inventory companies. In this atmosphere, speculative funds are large, and financial, speculative, and hoarding behaviors in the futures and spot markets have increased significantly, leading to progress in intermediate demand. Retailer GB5310-2008 "Seamless steel plate for alloy plate". Tensile test, hydraulic pressure test and flattening test are the same as those specified in GB3087-82; impact test is in accordance with GB229-9; flaring test is in accordance with GB / T242-9; grain size test is in accordance with YB / T5148-9; microscopic examination is in accordance with GB13298-9. Carbon layer inspection shall be in accordance with GB224-8. Ultrasonic inspection shall be in accordance with GB / T5777-96. In the formula: M & mdash; & mdash; abrasive spraying (throwing); 20g alloy plate V & mdash; & mdash; abrasive running speed; M1 & mdash; & mdash; single abrasive grain quality. Project scope Nujiang investment growth has increased, and a large number of derivative industry demand effects. In the new year, the national fixed asset investment accelerated, not only from the heating of the boiler plate market, but also from the leading investment in transportation and people's livelihood. As an important measure to resist the deterioration of the external demand environment, domestic demand, and stabilize economic growth, the acceleration of fixed asset investment will not only significantly increase the demand for construction alloy plates, but also a large number of construction machinery, home improvement, household appliances, machinery and equipment, logistics tools, 15crmog Demand for alloy plates and other industries has increased their demand for easy-to-use alloy plates. Maoming Cr5Mo1V alloy steel plate brand seamless steel plate like Brinell hardness (HB): It is a low-alloy structural steel such as 20Mn, 5MnV and other high-quality carbon-bonded steels such as 20, 30, and 3 45 or alloy steels such as 40Cr, 30CrMnSi, and 45Mn 40MnB. Rolled or cold rolled. 20th grade low carbon steel seamless plate is mainly used for fluid conveying board. 4 Seamless plates made of medium carbon steel such as 40Cr are used for mechanical parts, such as stressed parts of automobiles and tractors. In general, seamless steel plates are used to ensure strength and flattening tests. Hot-rolled steel sheet is delivered in the hot-rolled or heat-treated state; cold-rolled steel is delivered in the heat-treated state. Good: The general boiler plate temperature is below 450 ° C. Domestic plates are mainly hot-rolled or cold-drawn plates made of 10 and 20 carbon steel. consumption
Maoming Cr5Mo1V alloy steel plate brand steel plate for geological drilling (YB235-70) is a steel plate used by the geological department for core drilling. It can be divided into drill pipe, drill collar, core plate, sleeve plate and sedimentation plate according to the purpose. Service is the most common boiler water cycle faults, such as stagnation, backflow and vapor moisture layer. What measures need to be taken to prevent boiler water cycle faults? Packaging strategy no matter how affectionately our steel plate traders call, hysterically, Maoming 12Cr1MoVg alloy plate, chattering, but never call back the gentle performance of 20G alloy plate. 20G alloy plate is a category of boiler plate. In the process, there are extremely strict requirements for the required raw materials. This type of boiler plate is mainly used under high temperature and high pressure conditions. This will make the board under these conditions for a long time under the fumigation effect of smoke and water vapor, oxidation and a certain degree of corrosion. Therefore, when choosing the steel of 20G alloy plate, we must be particularly careful. It is necessary to choose a steel with good corrosion resistance, and a material that has extremely strong hardness and high stability. The role of alloy plates is also very special. It is mainly used for high-pressure-resistant main steam plates, superheated and reheated plates, and air-conducting plates with air-conducting effects. 20G alloy plates are widely used in high-rise buildings and stadiums, such as high-voltage towers and piles, and are not limited to the use of 20G alloy plates and resistance welding. However, the existing basic structure and steel plate standards have not followed the development and improvement of the industry. At present, there are only 20G alloy plates (GB / T816 20G alloy plates (GB / T1379 some standards, such as structure, welded steel plate standards have no separate special structure 20G alloy plates have no relevant standards. Standards adopted by design institutes in practice For example, GB / T3091 ”low-pressure fluid transport welding steel plate or GB / T13793 + agreement instead of 20G alloy plate, but these two required standards and the use of submerged arc welding steel plate structure is larger, using GB / T3091 for fluid transportation, GB / T13793 relates to the product 20G alloy plate. It is used for heating panels of low and medium pressure boilers (working pressure is not greater than 88Mpa, working temperature is below 450 ℃); for alloy plates (working pressure is generally above 8Mpa, working temperature is between 450 ℃ ～ 650 ℃) for heating panels, economizers, superheaters, reheaters, petrochemical industrial panels, etc. Seamless steel plate use Seamless steel plate ASTM A53 / A106 GR.B, Specification: 1 / 4 ″ -28 ″, 7-7 2mm plate and wire plate API SPEC 5L, steel number: X4 X4 X5 Specification: 1/4 ″ -28 ″, 7-7 2mm ASTM A106 / A53 / API 5L GR.B, steel No .: B, Specification: 1/4 ″ -28 ″, 7-7 2mm seamless low for heat exchanger and condenser Steel plate ASTM A17 Specification: 3/4 ″, 1 ″ -40 ℃ -101 ℃ seamless steel plate for low temperature operation ASTM A33 Specification: 1/4 ″ -28 ″, 7-7 2mm German standard DIN2448 / 1629 seamless steel plate, steel No .: St37, St44, St52, Specification: 1/4 ″ -28 ″, 7-7 2mm heat-resistant steel seamless steel plate (heat-strength plate) DIN17175-197 Steel No .: carbon structural steel St3 8-St4 8 / I , St3 8-St4 8 / III, alloy structural steel 15Mo3, 13CrMo44, 10CrMo910, specifications: 1/4 ″ -28 ″, 7-7 2mm carbon steel welded steel plate, American standard ERW high frequency welding plate ASTM A10 A5 Specification: 1 / 2 ″ -24 ″, 2 3-60 6mm British standard ERW high frequency welding plate BS138 Specifications: 1/2 ″ -12 ″, 2 3-32 8mm seamless steel plate seamless structure for structural use (GB / T8162-200 Yes Seamless steel plate for general structure and mechanical structure. The market price is classified by alloy steel according to the content of alloy elements, and is divided into low alloy steel (less than 5% total alloy elements) and medium alloy steel (total amount of alloy elements is 5). % -10%) Seamless steel plate for diamond core drilling (GB3423-8 is a seamless steel plate for drill rods, core rods, and sleeve plates for diamond core drilling.