Rostfritt stål Skrot

YES Stainless Co.,Ltd. specialiserat på tillverkning, leverans och export Rostfritt stål Skrot, med en fabrik i Taiwan. Det har alltid varit vårt fokus att tillverka bästa produkter och leverera dem i tid med uppmärksam kundservice. Vår innovativa anda ger oss möjlighet att ligga steget före våra konkurrenter genom att ge det bredaste sortimentet produkterna. Förfrågningar från globala grossister, distributörer, köpare, agenter och OEM / ODM är välkomna.
  • Strimlad Skrot
    Strimlad Skrot
    Stainless Steel Scrap is of two kinds i.e. Austentic and Martinestic. The difference between the two is that Austentic is Non Magnetic and Martinestic is Magnetic, which has been explained as follows:

    Magnetic (Martinestic) Stainless Steel Scrap
    Such as 409 / 410 / 430..etc.
    Non-Magnetic (Austentic) Stainless Steel Scraps
    Such as 304 / 304L / 316 /316L..etc.

    Due to the high value of metal, both iron and steel and aluminium scrap have been recycled whenever possible since the existence of the metal production itself. Given the chemical and physical properties of metal, the metal scrap can be recovered becoming secondary raw material which can, in almost all applications, compete with virgin material. Although scrap can be processed with high efficiency and little loss, this highly depends on the cleanness of the scrap, which is determined by separate collection and scrap treatment. Different scrap types (defined by scrap source) are the bases for the collection system and technologies employed in scrap processing, as well as being the starting point of the scrap sector.

    Scrap is first being distinguished as new scrap or old scrap depending on whether it reaches its end of life before or after the consumer.

    New Scrap
    New scrap generated during the production process is completely recycled either circulated onsite or sent directly to a remelter / refiner or a steelwork. Since the composition of the scrap is known, in principle it does not need any treatment process, although sometime cutting and shredding might be necessary.
    The total quantity of the new scrap can be estimated by input to output ratio at the plants for different products.

    Old Scrap
    Old scrap is collected after  consumption, either separately or mixed, and it is often contaminated to a certain degree, depending highly on its origin and collection systems. Since the life time of many metal products is more than ten years and some can be as long as more
    than 50 years, for instance products for building and construction, there has been an accumulation of metal in use since the beginning of the industry.
  • Rostfritt stål Stansning
    Rostfritt stål Stansning
    Austenitic Grades
    Austenitic grades are those alloys which are commonly in use for stainless applications. The austenitic grades are not magnetic. The most common austenitic alloys are ironchromium-nickel steels and are widely known as the 300 series. The austenitic stainless steels, because of their high chromium and nickel content, are the most corrosion resistant of the stainless group providing unusually fine mechanical properties. They cannot be hardened by heat treatment, but can be hardened significantly by cold-working.

    Straight Grades
    The straight grades of austenitic stainless steel contain a maximum of.08% carbon. There is a misconception that straight grades contain a minimum of.03%, but the specStainless.

    "L" Grades
    The "L" grades are used to provide extra corrosion resistance after welding.The letter "L" after a stainless steel type indicates low (as in 304L). The is kept to0.03% or under to avoid carbide precipitation. Carbon in steel when heated to temperatures in what is called the critical range (800 degrees F to 1600 degrees F) precipitates out, combines with the chromium and gathers on the grain boundaries. This deprives the steel of the chromium in solution and promotes corrosion adjacent to the grain boundaries.

    By controlling the amount of carbon, this is minimized. For weldability, the "L" grades are used. You may ask why all stainless steels are not produced as "L" grades. There are a couple of reasons. First, the "L" grades are more expensive. In addition, carbon, at high temperatures imparts great physical strength Frequently the mills are buying their raw material in "L" grades, but specifying the physical properties of the straight grade to retain straight grade strength. A case of having your cake and heating it too.This results in the material being dual certified 304/304L; 316/316L, etc.

    "H" Grades
    The "H" grades contain a minimum of.04% carbon and a maximum of.10% carbon and are designated by the letter "H" after the alloy. People ask for "H" grades primarily when the material will be used at extreme temperatures as the higher carbon helps the material  retain strength at extreme temperatures. You may hear the phrase "solution annealing". This means only that the carbides which
    may have precipitated (or moved) to the grain boundaries are put back into solution (dispersed) into the matrix of the metal by the annealing process. "L" grades are used where annealing after welding is impractical, such as in the field where pipe and fittings are being welded.
  • 304 rostfritt stål Skrot
    304 rostfritt stål Skrot
    Description of Stainless Steel Scrap:
    Stainless steels contain typically 10-30 % chromium besides other elements like C, Mn, Si, S etc.

    Chromium impar t s corrosion resistance to steel. Varying amounts of other alloying elements like Ni, Mo, V, Ti, Ni, etc may be added to obtain certain specific property.

    There are different types of stainless steels like:
    Austenitic stainless steels: which contain18% Cr,8% Ni, and C is in between 0.0 3-0.15%

    Ferritic stainless steels: which contain12% to30% Cr and 0.08% 0.12%C.

    Martensitic stainless steels: around13% C varying in between0.15% 0.25%. Certain grades contain C 0.6% 0.95%.

    Duplex stainless steels: in which Cr is around25%.

    Precipitation hardenable stainless steel: c o n t a i n 1 8-20% 8 10 % Ni and copper, Titanium, Aluminum.

    It may be noted that all stainless steels contain chromium and carbon besides other elements.Production of stainless steels requires controlling chromium and carbon.
  • Rostfritt stål Skrot 304
    Rostfritt stål Skrot 304
    Sources of steel scrap
    The iron and steel industry recycles three types of scrap: "home", "new", and "old" scrap.

    Home Scrap
    Home scrap is internally generated in the steel production process when steel mills and foundries manufacture new steel products.
    This form of scrap rarely leaves the steel-making production area.
    Instead, it is returned to the furnace on site and melted again.
    Technological advancements have significantly reduced the generation of home scrap which accounts for approximately29% of total scrap.

    New Scrap
    New scrap is generated during initial manufacturing processes. It is recycled onsite or sent directly to a steel works. The composition of new scrap is well known and in principle new scrap does not need any pre-treatment process before it is remelted, although cutting to size might be necessary.

    New scrap (also called prompt or industrial scrap) is generated in steel-product manufacturing plants and includes such items as turnings, clippings and stampings leftover when a part is made during manufacturing processes.  
    This material is typically sold to the scrap metal industry that processes it for sale to steel mills and foundries.  
    It accounts for approximately23% of total steel scrap.

    Old Scrap
    Old scrap is collected after a consumer cycle, either separately or mixed, and it is often contaminated to a certain degree, depending highly on its origin and collection systems. Since the life time of many metal products can be more than ten years and sometimes more than 50 years, for instance products for building and construction, there is an accumulation of metal in use since the beginning of the industry.
    Old or post-consumer scrap results when industrial and consumer steel products (such as, automobiles, appliances, buildings, bridges, ships, cans, railroad cars, etc.) have served their useful life.
    Old or post-consumer scrap accounts for approximately48% of total scrap.
  • Metallskrot
    Austenitic stainless steels have been widely used in conventional and nuclear power plants for different applications such as superheaters and heater components; they are also developed for use in cryogenics. These steels also perform well at elevated temperatures and they are extensively used for steam pipes and exhaust systems.
    The resistance to elevated temperature, oxidation, and corrosion makes the stainless steel a choice for storage tanks. However, there are many difficulties in joining of this material using the fusion welding methods. A concern, when welding the austenitic stainless steels, is the susceptibility to solidification and liquation cracking. Copper does not form brittle intermetallic compounds with iron and the melting point of the copper is lower than Fe and Ni. Thus, the flow-ability increases at higher temperature and encourage a suitable contact between the faying surfaces.

    In many instances the formation of brittle intermetallic phases in the diffusion zone leads to unfavorable changes in the mechanical and physical properties of the bonds. The present research focuses on the transient liquid phase diffusion bonding of stainless steel 304 using copper interlayers. The bonding variables and their effect on microstructural changes and mechanical properties of the joints have been investigated using optical and scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS) elemental analyses.

    304 contains18% chromium and8% nickel. 316 contains16% chromium,10% nickel and2% molybdenum. The "moly" is added to help resist corrosion to chlorides (like sea water and de-icing salts).

    304 stainless steel is STANDARD GRADE and typically comprises 17-20% 8-13% fasteners manufactured from this material show excellent resistence to corrosion in all but the harshest environments. 316 grade stainless steel, also known as MARINE or A4 grade, comprises 16-18.5% 10-14% nickel but also includes 2-3% of the element Molybdenum, which provides increased resistance to chloride corrosion (e.g. corrosion in salt water environments). Molybdenum also minimises metallic contamination making 316 stainless very suitable for food and pharmaceutical processing environments. 316 fasteners are commonly used on boats, and in any coastal environment where the fastener may come into regular contact with salt water spray or mist.
  • 316 rostfritt stål Skrot
    316 rostfritt stål Skrot
    All standard grades of stainless steel contain iron, carbon and a minimum of 11.5% chromium, the element responsible for the inherent corrosion resistance of the alloy. All stainless steels resist corrosion, although the degree of resistance to attack by many common chemicals, food products and other materials is variable. To enhance or supplement the effect of chromium, other alloying elements are added to straight chromium stainless steels as follows:

    1. Nickel— to stabilize the austenitic structure, improve forming properties, increase ductility, high temperature strength and corrosion resistance (particularly in industrial and marine atmospheres, chemical, food and textile processing industries).

    2. Silicon— to increase scaling resistance and resist carburizing at high temperatures.

    3. Manganese— to improve hotworking properties, increase yield and tensile strengths (above2%), partially replace nickel and stabilize the austenitic structure.

    4. Molybdenum— to increase corrosion resistance (particularly in sulfite, sulfate, acetic acid and acetate solutions and salt water atmosphere), increase creep resistance, increase strength at elevated temperatures, expand range of passivity and counteract tendency to pit.

    5. Titanium, ColumbiumTantalum—to prevent intergranular corrosion by stabilizing the carbon as titanium or columbium carbides instead of chromium carbides, produce finer grain size, reduce stretcher strains from drawing and forming in Type 430.

    6. Sulphur, Phosphorus and Selenium— to improve machinability.

    7. Additional Chromium— to increase scaling, wear and corrosion resistance and increase tensile strength.

    Type 316316L
    contain substantial molybdenum additions for improved corrosion resistance (particularly pittype corrosion), creep resistance and high temperature strength. Carbon content 316L is low for welding purposes.
  • Rostfritt stål göt
    Rostfritt stål göt
    Vi tillverkar, leverans och export av hög kvalitet i rostfritt stål göt.Vi använder högkvalitativa råvaror och mycket sofistikerad teknik för att tillverka dessa produkter.Vår rostfritt stål göt är mycket effektiv och har mycket slät yta.Vi erbjuder våra rostfritt stål göt till mycket rimliga priser.

    Om du letar efter det var vänlig kontakta oss för att få mer information.

  • Bästa Metallskrot
    Bästa Metallskrot
    The growing interest in metal life cycles stems from the basic idea that before optimizing a complex system all of its aspects need to be fully understood. Metals are core materials of the industrialized world and essential to maintaining our modern lifestyle. Their use has grown exponentially over the past century (1) and continues to grow as increasing numbers of countries strive for technological development and higher living standards. Although there are indications that the demand for metals may slow or stabilize in mature economies (2), this is not the case in rapidly growing emerging economies such as China and India. Froman environmental perspective,an increased demand for metals typically means more mining, energy use (3, 4), and water consumption (5). Conversely, when scrap is used as a raw material, the energy requirements of metal production can be lowered signifi-cantly (6). Understanding the current and future scrap supply is, therefore, a key goal if the use of primary metals is to be reduced.

    Process Routes and Technology
    Steel making has to be seen as part of a chain which leads from raw materials to semi-fabricated products.
    The classical process route for electric steelmaking is
    • scrap charging
    • melting down
    • tapping
    • secondary metallurgy
    • slab casting
    • hot rolling
    • cold rolling
    • treatments
    • delivery
  • Rostfritt skrot
    Rostfritt skrot
    Nickel Metal
    Nickel is a naturally occurring, lustrous, silvery-white metallic element. It is the fifth most common element on earth and occurs extensively in the earth's crust. However, most of the nickel is inaccessible in the core of the earth.

    Global Stainless Steel Manufacturing and Scrap Cycle
    The use of stainless steel has been characterized for 51 countries and the world for the years 2000 and 2005. We find that the global stainless steel flow-into-use increased by more than30% in that 5 year period, as did additions to in-use stocks.This growth was mainly driven by China, which accounted for almost half the global growth in stainless steel crude production and which tripled its flow use between 2000 and 2005. The global stainless steel-specific end-of-life recycling rate increased from66% (2000) to70% (2005); the landfilling rate was22% for both years, and9% (2000) to12%(2005) was lost recycled carbon and alloy steels.Within just 5 years, China passed such traditionally strong stainless steel producers and users as Japan, USA, Germany, and South Korea to become the dominant player the stainless steel industry. However, China did not produce any significant stainless steel end-of-life flows in 2000 or 2005 because its products-in-use are still too new to require replacements.Major Chese discard flows are expected to beg between 2015 and 2020.
  • Rostfritt stål Scraps
    Rostfritt stål Scraps
    Scrap qualities
    Generally, steel scrap can be divided into three categories:
    A) home scrap (plant scrap)
    B) process scrap (prompt scrap)
    C) obsolete scrap (capital scrap)

    A) Home scrap is generated in steel mills during the production of steel. It is relatively pure and its chemical composition is known, so it can be easily recycled.

    B) Process scrap is generated in the manufacturing of products made from steel. This scrap occurs during production of both industrial and consumer end products.
    Process scrap is available for recycling in relatively short time after its generation. However, scrap preparation and classification are essential before melting. The rate of process scrap generation will be decreasing due to the better steel utilisation in steel processing.

    C) Obsolete scrap consists of iron or steel products discarded after the end of their service life. Post-consumer steel products include old passenger cars, steel cans, electric appliances and other items. Obsolete scrap is often mixed or coated with other materials, such as copper, zinc, tin, glass and plastics. For this reason the content of tramp elements in obsolete scrap is usually high. Moreover, the chemical composition of obsolete scrap fluctuates widely depending on its origin and degree of processing. Obsolete scrap, especially the one originating from old passenger cars, is usually processed by shredding.
  • Metallskrot
    Steel is undoubtedly the indispensable material of the modern technology driven society. Since steel encompasses a class of over 2500 different grades currently produced and used, there is a wide variety of properties leading to an even wider spread of uses.

    There are countless possibilities of combinations with regard to micro and macro structure, alloying elements, heat and mechanical treatment procedures, etc. Being used for thousands of years, one could expect that the scope of possible improvements is limited. However, the increasing challenges from other materials have been met by continuous product and process development ensuring the competitive edge for steel. It is fair to say that the potential of steel developments has been so far used only to a very limited extent leaving ample opportunities.

    Steels can be used in a number of ways. With respect to service properties, the classification is made according to the three groups of
    • base steels
    • quality steels and
    • high-grade steels
    One can also use the amount of alloying additives to classify
    • unalloyed to medium alloyed steels and
    • alloyed steels

    The second classification is sometimes more useful, since high-grade steels can be high alloyed stainless steels as well as ultra low carbon steels distinguished by a particularly low level of alloying elements and impurities.

    The second method of classification is useful for electric steelmaking, since we encounter two rather distinct groups of mills with respect to their product range.
    On the one hand we have the producers of high alloyed steels, mainly stainless, high temperature resistant and acid-proof grades. These steels are nearly exclusively produced by electric steelmaking with tight control over temperature and composition. On the other hand, we have the production of preliminarily lower quality grade long products directed into construction industry. Here the advantages of scrap as a relatively cheap and abundantly available raw material are exploited. It has to be stated that internationally there are strong tendencies to improve the quality range and to produce flat products, too, thereby competing strongly with integrated mills.

    The remainder of this chapter gives an overview of the economic issues, followed by the technological issues of electric steelmaking in the second chapter. The article is concluded by an in-depth discussion of the issues arising in connection with scrap and scrap supply.
Vår Hemligheten bakom framgång har varit vår ledningens policy att ansluta sig till affärsetik i sin hantering av kunder. Vi försäkrar dig om leverans i tid av finaste Rostfritt stål Skrot backas upp av ombedd och noggrann kundservice.

Vår kvalitet utbud av Rostfritt stål Skrot kommer från pålitliga tillverkare över hela världen. Detta rena och rostskyddande skrot används flitigt vid tillverkningen och produktionsprocessen av olika produkter av rostfritt stål och i massa-och pappersbruk. Förekomst av molybden i detta skrot ger det en högre motståndskraft mot gropfrätning och spaltkorrosion i klorid miljö. Vi upphandlar denna produkt från kända leverantörer av metallindustrin som försäkrar kvalitet och tillförlitlighet av skrotet till oss. Dessa klipp finns i båda, plåt sticklingar och strimlade former. För att garantera säker transport, saker vi dessa rester i behållare och transportera dem till önskade platser.
Med vår expertis inom detta område kan vi erbjuda en högre kvalitet sortiment av Rostfritt stål Skrot. Det erbjudna sortimentet kommer från pålitliga tillverkare som säkerställer att utforma dessa produkter enligt de specifikationer som anges av klienterna. Vi tar yttersta omsorg för att säkerställa att skrot noggrant granskas vid mottagandet för att säkerställa dessa är fria från föroreningar. Dessa stål Scraps har hög densitet och används för tillverkning av olika produkter av rostfritt stål, som ytterligare används i återanvändbara metallindustrin. Vårt team av hängivna yrkesmän säkerställer att våra produkter uppfyller internationella normer och finns på marknadsledande priser.
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