in order to prevent the back of the underlying weld bead from being oxidized, the back also needs to be protected by gas.
SPHCSPHC—& mdash; In the first place, 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.
.For example, the price of 10000 tons of goods 04 = 963846 tons = the result example: the price excluding tax of 1 ton of goods = 15800 a ton 04 = 15193077 ~ the total weight of the known coil weight and price = the coil weight price, the thickness of stainless steel plate & Chi; Width & Chi; Long & Chi; 93 e.g. 0 & Chi; 22Χ 44Χ 93 = 42kg stainless steel plate weight per square meter (kg) calculation formula: specific gravity thickness (mm) width (mm) length (m) stainless steel weight per meter (kg) stainless steel pipe calculation formula: diameter (mm) diameter (mm) (correct calculation of the price difference between burr and trimming of nickel stainless steel 0.0062 chromium stainless steel) in the market the price difference between burr and trimming of stainless steel is usually set at a fixed price. For example, it is generally considered in the market that the price difference between burr and trimming of 201 is 200 yuan tons and that of 201 is 300 yuan tons. In fact, this method is not scientific. In fact, the price difference between burr and trimming of stainless steel is different The correct calculation should be like this.
7. Distinguish between 316L and 304L. There are two kinds of commonly used stainless steel 30316l (or corresponding to the German / European standard 430844036l, the main difference in chemical composition between 316L and 304 is that 316L contains Mo, and it is generally recognized that 316 has better corrosion resistance than 304 in high temperature environment. Therefore, engineers generally choose 316L parts in high temperature environment. However, there is no absolute thing. In concentrated environment, 316L should not be used at any higher temperature! No However, this is a big problem. People who study mechanics have all studied threads. Remember a black solid agent that needs to be applied to prevent threads from biting under high temperature: molybdenum disulfide (MOS), from which two conclusions are drawn: No:  Mo is indeed a high resistance material (know what crucible gold is melted in? Molybdenum crucible!).  : molybdenum can easily react with high valence sulfur ions to form sulfide. Therefore, no stainless steel is super corrosion resistant. In the final analysis, stainless steel is a steel with more impurities (but these impurities are more corrosion resistant than steel). If it is steel, it can react with other substances.
.[(outer diameter wall thickness) wall thickness] 0.02491 = kg m (weight per meter)
The width of coiled material is variable, including 30mm.60mm.45mm.80mm.100mm.200mm, etc. it can also be divided according to customer requirements
The stainless steel strip is supplied in coils, also known as strip steel. It is divided into hot rolling and cold rolling, as well as ordinary steel strip and high-quality steel strip. There are many kinds of stainless steel belts! Wide use! There are: 201 stainless steel belt, 202 stainless steel belt, 304 stainless steel belt, 301 stainless steel belt, 302 stainless steel belt, 303 stainless steel belt, 309S stainless steel belt, 316L stainless steel belt, 317L stainless steel belt, 310S stainless steel belt, 430 stainless steel iron belt, etc! Thickness: 0.02mm-4mm, width: 5mm-1550mm, can be customized without standard!
Fabrication of stainless steel pipe
Stainless steel pipes and water transmission equipment for fluid transportation such as water and gas are advanced basic water purification materials in the world. They have strong anti-corrosion performance, which can not be compared with cast iron pipes, carbon steel pipes and plastic pipes.
The cold rolled steel strip has good strength and yield ratio, and the hot rolled steel strip has good ductility and toughness.
target.It is a kind of product manufacturing enterprise. It has long been specialized in L stainless steel pipe, s stainless steel pipe and 904L stainless steel pipe. Therefore, the specification of a group of slightly larger formed pipes used in the production of pipe molds is about 6000-20000.
The existence of medium temperature brittle zone requires strict heat treatment and welding process system to avoid the appearance of harmful phase and damage the performance.
%）.It means: 100 times of Dr + iron loss value (iron loss value per unit weight when 50Hz repeated magnetization and sinusoidal magnetic induction intensity is 5T) + 100 times of thickness value. For example, dr510-50 indicates that the iron loss value is hot-rolled silicon steel plate with thickness of 0.5mm. The grade of hot rolled silicon steel sheet for household appliances is expressed by JDR + iron loss value + thickness value, such as jdr540-50.
The power supply with vertical external characteristics is adopted, and the positive polarity is adopted in DC (the welding wire is connected to the negative pole).
Promotion.The internal and external greasy dirt and sundries at the pipe end shall be completely removed to keep the pipe inside the pipe fittings clean.
Some reasons for product composition ratio: in order to reduce the production cost, reduce the proportion content of some important elements such as chromium and nickel, and increase the content of other elements such as carbon. This production phenomenon that the composition ratio is not strictly in accordance with the product model and product characteristics not only greatly reduces the product quality, for example when the chromium content of stainless steel pipe is insufficient, it not only affects the production The corrosion resistance and formability of products have potential product quality and safety hazards when they are used in chemical, equipment and production industries. At the same time, they also affect the appearance and oxidation resistance of products.
mdash; Martensitic precipitation hardening stainless steel.
.[hot rolled strip / sheet] has the advantages of low hardness, easy processing and good ductility.
The shielding gas is argon with a purity of 999%. When the welding current is 50 ~ 50a, the argon flow is 8 ~ 0lmin, and when the current is 50 ~ 250A, the argon flow is 2 ~ 5lmin.
416— The addition of sulfur improves the processability of the material.