Stainless stee
Stainless steeSPHDSPHD—& mdash; Hot rolled steel plate and strip for stamping.
Cutting tool level & rdquo; Martensitic steel, an early stainless steel similar to Brinell high chromium steel. It is also used for surgical tools, which can be made very bright.
.Stainless steel tube for boiler tube and heat exchanger (gjb2608-9 (yb676-7) aviation structural tube, thick wall seamless steel tube (gjb2296-9 (yb678-7) aviation stainless steel tube (ybt679-9) (yb679-7) aviation 18a blind rivet seamless steel tube (gjb2609-9 (yb680-7) aviation structural tube, seamless steel tube (ybt681-9 (yb681-7 aviation conduit 20A seamless steel pipe small diameter stainless steel pipe seamless steel pipe for high pressure boiler low and medium pressure boiler pipe stainless acid resistant extremely seamless steel pipe seamless steel pipe for petroleum cracking seamless steel boiler and heat exchanger Ferritic and austenitic alloy pipe general purpose austenitic stainless steel pipe and welded pipe austenitic stainless steel seamless steel pipe welded steel pipe welded steel pipe carbon steel, Ferritic and austenitic alloy steel pipe) General requirements General requirements for ferrous and alloy steels for special purposes General requirements for carbon
Seamless stainless steel pipe, also known as stainless steel pipe, is made of steel ingot or solid pipe blank through perforation, and then made by hot rolling, the national economy has achieved rapid growth, and a large number of urban houses, public buildings and tourism facilities have been built, which puts forward new requirements for hot water supply and domestic water supply. In particular, people pay more and more attention to the problem of water quality, and the requirements are also increasing. Galvanized steel pipe, a common pipe, will gradually withdraw from the historical stage under the influence of relevant countries because of its corrosivity. Plastic pipe, under certain circumstances, stainless steel pipe has more advantages, especially the stainless steel pipe with wall thickness of only 0.6 ~ 2mm. In high-quality drinking water system, hot water system and water supply system that puts safety and sanitation first, it has the characteristics of safety, reliability, sanitation environmental protection, energy-saving and environmental protection pipes with good comprehensive performance of water supply system. It is also a very competitive water supply pipe economy and applicability. It has been proved by engineering practice at home and abroad that it is one of the new, which will play an incomparable role in improving water quality and people's living standards.
.Stainless steel has the ability of atmospheric oxidation, it does not rust. At the same time, it also has the ability of corrosion resistance in the medium containing acid, 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, not any kind of stainless steel can resist corrosion and rust at any time
Stainless steel pipe national standard thickness in the stainless steel pipe industry, the steel that meets the national standard is generally called & ldquo; National Standard & rdquo; Inferior steel that does not meet national standards is called & ldquo; Winning the bid& ldquo; Non standard & rdquo; In practical application, the quality of national standard and non-standard is similar, mainly due to the difference in thickness. A thickness of national standard is actually 1mm but a thickness of non-standard is actually only 0.8mm or other thickness less than 1mm. Non-standard is basically equivalent to winning the bid. Standard index size (323mm) label number standard implementation standard gbt14976-2012 non-standard specific thickness ratio outer diameter steel pipes are produced according to the standard. 2 non-standard belongs to customized difference. Wood office says ha ha customized on demand. 3 thickness area: the difference between standard, thickened, stainless steel American Standard and national standard mainly lies in C content and P content; The C content and P content of Chinese standards are lower than those of American Standard ASTM A312@_@ The two important elements of material are chromium and nickel, 15 9 large plants and 18 8 large plants of national standard and 18 8 small plants of American Standard 132@_ @ The national standard contains more than 17 chromium and the American Standard contains more than 18 chromium@_@ Stainless steel pipe is an American Standard, not in the national standard. The corresponding national standard is 06cr19ni10.
No matter under dynamic load or static load it has higher energy absorption capacity than austenitic stainless steel, which has obvious advantages and practical application value for structural parts to deal with sudden accidents such as collision, etc. Compared with austenitic stainless steel, duplex stainless steel has the following disadvantages: its universality and versatility are not as good as austenitic stainless steel. For example, its service temperature must be below 250 ℃.
The width of coiled material is variable, including 30mm.60mm.45mm.80mm.100mm.200mm, etc. it can also be divided according to customer requirements
After fine tuning the molten steel temperature in the argon blowing station, it is lifted to the ladle rotary table for continuous casting.
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, fire and high temperature resistance, strong overload capacity, 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 enters the cooling tower for water spray cooling. After cooling, 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.
Management Department. 410— Martensite (high strength chromium steel), good wear resistance and poor corrosion resistance.
At low temperature,Stainless steel food tube, the quality of professional stainless steel plate, coil, strip and tube is guaranteed. The company is professional, timely and cost-effective. It has become the first choice brand for many wire products. Welcome to buy! Ferritic stainless steel tubes have low-temperature brittleness like carbon steel,Model of stainless steel pipe, while austenitic steel does not. Therefore, SUS430 of ferritic stainless steel pipe (18cr) and others show a sharp drop in impact value at low temperature. Therefore, it is necessary to pay special attention when using at low temperature. As a way to improve the impact toughness of ferritic series stainless steel, high purification process can be considered. With the help of grade C and N, when the embrittlement temperature is improved in the range of - 50 ℃ to - 100 ℃, it is possible to use it in freezing related projects Sus430lx (18cr Ti, Nb LC) and sus436l (18cr Mo Ti, sharp cracks will expand rapidly and cause brittleness. Austenitic stainless steel will not produce brittleness because it has a face centered cubic structure. Austrian stainless steel SUSL (18cr-9ni LC) is used And SUSL (18cr-12ni-2mo-lc) show that they still have superior impact characteristics at low temperature. However, pay attention to the precipitation of ferrite or martensite due to processing, and the tendency of embrittlement due to sensitization and carbide or & sigma; equal heterogeneous precipitation.
In order to prevent the occurrence of welding pores, the welding parts must be cleaned if there is rust, oil stain, etc.
2020303043310s 331632404420, 430 and other materials.
Supply chain quality management.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
When using this method, it should be noted that the water-soluble paper should be double-layer and must be pasted well, otherwise it is easy to cause damage and fall off of the water-soluble paper, resulting in loss of argon protection of the inner weld and oxidation, resulting in cutting of the weld junction and re welding, which can not ensure the welding quality and seriously affect the construction period. Therefore the water-soluble paper should be strictly checked and pasted before welding.
SPHC—& 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.
.The difference between duplex stainless steel plate and ferritic 410 stainless steel plate: the comprehensive mechanical properties are better than ferritic stainless steel, especially the plastic toughness, which is not as brittle as ferritic stainless steel.
Organic substances (such as melons and vegetables, noodle soup,36 stainless steel plate, phlegm, etc.) adhered to the surface of stainless steel constitute organic acids in the presence of water and oxygen. For a long time, the corrosion of organic acids on the metal surface.
There are ba face, 2b face, (white skin), 2D face, (frosted), HL (wire drawing), 8K face and other surfaces with good quality and brightness.