Stainless Steel Sand Casting

ProcessSand castingMaterialStainless Steel, Carbon Steel, Aluminum, brass, iron, ductile ironMaterial GradeGB, ASTM , AISI , DIN , BS,Weight1 kg~500kgAccuracyClass CT6~CT9Surface RoughnessUpTo Ra6.3~Ra12.5Applied Softwareproe, catia, ug, solidworks, cad, pdf, etcProduction CapacityMore Than 100T Per MonthHeat TreatmentAnneal,Quenching,Normalizing,Carburizing,Polishing,Plating, Painting,etcMachining EquipmentCNC Center , CNC Machines, Turning Machines,Drilling Machines , Milling Machines, Grinding Machines,etcMeasuring ToolCMM , Projector, Vernier Caliper, Depth Caliper, Micrometer,Pin Gauge, Thread Gauge , Height Gauge,etcQC System100% Inspection Before ShipmentReport100% Report with shipmentTransportAir or SeaFAQ:1. Are you a factory or trade company?-------We are a factory. We provide you one-stop service, from mold design to finish part.2. Where is your factory?-------Our factory located on WuXi which is a beautiful city near from ShangHai and famous for Custom product.3.How to order?-------First, Customers could send us your sample drawing, such as 2D and 3D drawing(IGS or STP format)          Second, Our engineers will check the drawing carefully and then provide you a better price.Third, If you accept, then order confirmed.4.Your price is very high and i can get more lower price from other supplier.-------First, You can always get some lower price from some suppliers in China. There is no lowest price in China at all. there is only much lower price one by one.Of course, if you could bear various kinds of bad problems and invalid commitment of cheaper productions. Their price is cheaper $ 1 than us and you can earn 10000 USD on 10000 pcs parts. But you will lose more than 10000 USD, even more lose a faithful customer if it happend a mechanical mishap occur. At the same time, I don't think you can get more higher efficiency of the supply when you get a price which is lower 0.5-1 USD because price elasticity depends on different service.Finally, you are an expert in the filed, if they can give you an offer which is even lower than the cost. What will you think about it.What you will get is what you paid for.5. What are your main products? Precision casting parts, sand casting parts, machining parts, surface treatment parts, etc.Our advantages:1: Globally acceptable quality: The products offered by us are thoroughly examined by our experienced professionals to ensure their durability, reliability and long service life.  2:Competitive price: direct manufacturer, reducing all unnecessary cost for you.3:Professional team:5 years foreign customers service experience. Over 10 years investment casting manufacture. Almost 35% high educated people.Hoohi is able to work with most of the 2D and 3D software, like Auto CAD, SolidWorks, Pro/Engineer, UG and others. Our engineers are ready to help customers with any technical issues.We could use software Magma that be able to improve our casting quality.The product are exported to US, Japan, UK, Canada, Netherland, Germany, etc .The professional team with rich practical experience will help you optimizing the whole solution for you from casting designing, casting processing to machining, heat treatment, surface treatment and so on, lower total processing cost a or achieve value-added products, help you to improve market competitiveness and obtain maximize profits.  Any question, please feel free to contact us. We look forward to establishing long-term cooperation with you!ROLE OF ALLOYING ELEMENTS IN STAINLESS STEELCARBONCarbon is always present in stainless steel. The amount of carbon is the key. In all categories except martensitic, the level is kept quite low. In martensitic grade the level is deliberately increased to obtain high strength and hardness. Heat treating by heating to a high temperature, quenching and then tempering develops the martensitic phase.Carbon can have an effect on the corrosion resistance. If the carbon is allowed to combine with the chromium (to form chrome carbides), it may have a detrimental effect on the ability of the “passive” layer to form. If, in localized areas, the chrome is reduced to below 10.5%, the layer will not formCHROMIUMChromium is a highly reactive element and accounts for the “passive” nature of all stainless steels. The resistance to the chemical effects of corrosion and the typical “rusting” (oxidation) that occurs with unprotected carbon steel, is the direct result of the presence of chromium. Once the composition contains at least 10.5% chromium, an adherent and insoluble surface film is instantaneously formed that prevents the further diffusion of oxygen into the surface and prevents the oxidation of the iron in the matrix. The higher the chromium level the greater the protection.NICKELNickel is the essential allying element in the 300 series stainless steel grades. The presence of nickel results in the formation of an “austenitic” structure that gives these grades their strength, ductility and toughness, even at cryogenic temperatures. It also makes the material non-magnetic. While the role of nickel has no direct influence on the development of the “passive” surface layer, it results in significant improvement in resistance to acid attack, particularly with sulfuric acid.MOLYBDENUMThe addition of molybdenum to the Cr-Fe-Ni matrix adds resistance to localized pitting attack and better resistance to crevice corrosion (particularly in Cr-Fe ferritic grades). It helps resist the detrimental effects of chlorides (316 with 2% moly is preferred over 304 in coastal and de-icing salt situations). The higher the molybdenum content (there are stainless steels at 6% moly), the better the resistance to higher chloride levels.MANGANESEGenerally manganese is added to stainless steels to assist in de-oxidation, during melting, and to prevent the formation of iron sulfide inclusions which can cause hot cracking problems. It is also a “austenite” stabilizer and when added in higher levels (from 4 to 15%) replaces some of the nickel in the 200 series stainless steel grades.SILICON & COPPERSmall amounts of silicon and copper are usually added to the austenitic stainless steels containing molybdenum to improve corrosion resistance to sulfuric acid. Silicon also improves oxidation resistance and is a “ferrite” stabilizer. In “austenitic stainless steels, high silicon contents improves resistance to oxidation and also prevents carburizing at elevated temperatures (309 and 310 are examples)NITROGENIn “austenitic” and “duplex” stainless steels, nitrogen increases the resistance to localized pitting attack and inter-granular corrosion. Low carbon “austenitic” grades (designated with an “L” since they contain less than 0.03% carbon), are suggested for welding operations, since the lower carbon minimizes the risk of sensitization. The low carbon levels, however, tend to reduce the yield strength. The addition of nitrogen helps to raise the yield strength levels back to the same level as standard grades.NIOBIUMNiobium additions prevents inter-granular corrosion, particularly in the heat effected zone after welding. Niobium helps prevent the formation of chrome carbides, that can rob the microstructure of the required amount of chromium for passivation. In “ferritic” stainless steels the addition of niobium is an effect way to improve thermal fatigue resistance.TITANIUMTitanium is the main element used to stabilize stainless steel before the use of AOD (Argon-Oxygen Decarburization) vessels. When stainless steel is melted in air, it is difficult to reducing the carbon levels. 302, the most common grade before AOD’s, was allowed to have a maximum carbon level of 0.15%). At this high level, something was needed to stabilize the carbon and titanium was the most common way. Titanium will react with the carbon to form titanium carbides and prevent the formation of chrome carbides, that could affect the formation of the “passive” layer. Today all stainless steel are finished in an AOD vessel and the carbons levels are generally low due to the absence of oxygen. The most common grade today is 304 (with 0.08 max carbon, although in reality the levels are lower).SULFURSulfur is generally kept to low levels as it can form sulfide inclusions. It is used to improve machinability (where these inclusion act as “chip breakers). The addition of sulfur, however, does reduce the resistance to pitting corrosion.