• Nombre del producto: Stainless Steel
  • ID del Producto: 07_1

stainless steel plate

Stainless steel plate Product details:
     Stainless steel plate (coil) smooth surface, higher corrosion ductility, toughness and mechanical strength, acid and alkaline gases, solvents and other media. It is a rusty steel is not easy, but not definitely not rust.
     Stainless steel plate (coil) Category: Method according to two types of hot and cold, cold plate comprises a thin thickness of 0.02-4 mm and 4.5-50 mm plate.
Classification according to the thickness

(1)Sheet(0.2mm-4mm) (2)Plate(4mm-20mm) (3)Slab(20mm-60mm) (4)Special plate(60-115mm)
According to the production method of classification
(1) Hot-rolled steel plate (2) cold-rolled steel
     Stainless steel plate having a nickel-chromium alloy with an unstable 304 generally similar to resist corrosion. For a long time in the temperature range of the degree of chromium carbide heating may affect the 321 and 347 alloys in the harsh corrosive media. Mainly used for high temperature applications, high-temperature applications require materials with strong anti-allergy activity, lower temperature to prevent inter-granular corrosion.
     Stainless HRC: Thickness 1.5-15 width 1000 or 1219 or 1500 or 1800 or 2000 (including flash)
     Stainless steel cold rolled coils: thickness 0.3-3.0 width 1000 or 1219 or 1500 (including flash)
     Stainless steel cold rolled coil: Thickness 0.1-3.0 width of 500 or 1600 (including flash)

 After heat treatment and pickling treatment after hot rolling N0.1.
     2B cold rolled after heat treatment, pickling or a similar process, and finally through the smooth access to appropriate gloss.
     2D heat treatment after cold rolling, pickling, or similar process or matte surface.
     3 # 100 to # 200 abrasive belt grinding out product.
     4 # 150 to # 180 abrasive belt grinding out product.
     HL appropriate size of the abrasive polishing material, the surface of a continuous grinding grain.
     In order to ensure the yield strength of stainless steel coil, the mechanical properties of tensile strength, elongation and hardness to meet the requirements, must be annealing, solution heat treatment, aging treatment before the stainless steel coil heat treatment delivery. The corrosion resistance of stainless steel coil mainly depends on its alloy composition structure (chromium, nickel, titanium, silicon, aluminum, etc.) and stainless steel coil inside, play a major role chromium. Chromium has a high chemical stability, can form a passive film on the steel surface, the metal with the outside world to isolate and protect steel from oxidation and increase the corrosion resistance of steel. After the destruction of the passive film, corrosion resistance on the decline.

    Stainless steel coil is widely used in chemical, food, pharmaceutical, paper, oil, atomic energy and other industries, as well as construction, kitchen utensils, dishes, vehicles, household appliances, all kinds of parts

 

 

2 stainless steel pipe
standard
International Stainless Steel marking method

 

American Iron and Steel Institute is a three-digit number to indicate a variety of standard grade wrought stainless steel. among them:
     austenitic stainless steel with 200 and 300 series of numerals, for example, some of the more common austenitic stainless steel is 201, 304, 316 and 310 as a marker,
     ferritic and martensitic stainless steel 400 series is represented by numbers.
     ferritic stainless steel is marked 430 and 446, 410, 420 and 440C martensitic stainless steel is marked,
     Duplex (austenitic - ferritic), stainless steel, precipitation hardening stainless steel and high alloy iron content of less than 50% usually uses proprietary name or trademark name.

 

Standard classification and grading

     4-1 of Classification: ① national standard GB, ② industry standard YB, ③ local standards, ④ enterprise standard Q / CB
     4-2 Category: ① product standards, ② packaging standards, ③ method standards, ④ basic standards
     4-3 standard level (three levels): Y-level: the international advanced level class I: International general level H level: advanced level
     4-4 GB
     GB1220-2007 stainless steel bar (I grade) GB4241-84 stainless steel welded plate Park (H level)
     GB4356-2002 stainless steel welded plate Park (I grade) GB1270-80 stainless steel pipe (I grade)
     GB12771-2000 stainless steel pipe (Y class) GB3280-2007 stainless steel cold plate (I grade)
     GB4237-2007 stainless steel hot plate (I grade) GB4239-91 stainless steel cold strip (I grade)

Rusty reason

    304 stainless steel rusting occurs, there may be several reasons:

Chloride

  Widespread presence of chloride ions, such as salt / sweat / sea / sea / soil and so on. Stainless steel in the presence of chloride ions in the environment, the corrosion quickly, even more than ordinary low-carbon steel. Therefore, use of stainless steel environment requirements, and require frequent cleaning to remove dust, clean and dry. (So that you can give him set a "misuse.") The United States is an example: a company with an oak container containing a chlorine ion-containing solution, the vessel has been used hundreds of years, it plans to replace the nineties due to lack of modern oak, using a stainless steel container 16 days to replace the leaking due to corrosion.

Solution Treatment

    No alloying elements dissolved in the matrix, resulting in tissue matrix alloy content is low, poor corrosion resistance.

Intergranular corrosion

   This material does not contain titanium and niobium have a tendency to intergranular corrosion. Added titanium and niobium, together with the stabilization process can reduce intergranular corrosion. In the air or chemical corrosion medium corrosion resistant to a high alloy steel, and stainless steel is a beautiful surface and good corrosion resistance, without going through the plated surface treatment, and play inherent in the surface properties of stainless steel, for use in multiple an aspect of the steel, commonly referred to as stainless steel. Representative of the performance of 13 chrome steel, 18-8 chrome-nickel steel alloy. From the metallographic point of view, because the chromium film formed on the surface of stainless steel contains chromium leaving the thin, the membrane separating invasive oxygen within the steel from corrosion effect. In order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 12% of chromium. The need for welding applications. Lower carbon content makes it close to the weld heat affected zone to minimize carbide precipitation, and carbide precipitation may result in intergranular corrosion of stainless steel in certain environments (welding erosion).

Superficies

     Surface marks phenomenon means 304 stainless steel deep processing or processed products after grinding, wire-bound or spotting pit marks defects in the product surface.
     Cause: The surface of the mold surface of a foreign body, clamping pad surface scars.
     Solution: removal of foreign body prior to processing, scars can also be removed by thoroughly grinding and orange peel.
     Orange peel refers to a molded article 304 in the polishing or other cases, the surface of the same shape as the orange peel phenomenon.
     Cause: The grinding inadequate, the more serious the greater processing orange peel, raw coarse grains, a heat treatment to soften.
     Countermeasures: deep-processing products are fully ground, select the appropriate heat treatment conditions, grain size control of raw materials









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