![]() There are numerous uses for grey iron castings and they are usually classified into categories based on their class.Grey iron castings are the ideal solution to overcome problems of corrosion. Another important characteristic of grey iron castings are that they are highly resistant to oxidation, which in turn leads to prevention of rust. ![]() Since its damping capacity is about 20-25 times higher than steel and also other iron types, it reduces vibration, inaccuracies as well as excessive wear and tear on machinery and bearings. Grey iron castings have high damping capacity and excellent machining capabilities, which make them perfectly suitable for all types of machine bases, cylinder blocks as well as brake parts.This is the foremost reason as to why they are a premier choice for huge posts and columns in big buildings. Grey iron castings possess the ability to withstand large amounts of compressive forces and thus have a high compressive strength, which is about three times more than its tensile strength.The average tensile strength is around 7 tons per square inch and it is possible to increase their strength easily by adding vanadium, if needed for specific applications. Grey iron castings are available in different tensile strengths such as 5 tons per square inch or even 19 tons per square inch.The variation of the tensile modulus of elasticity of the various grades is a reflection of the percentage of graphite in the material as such material has neither strength nor stiffness and the space occupied by graphite acts as a void, thereby creating a spongy material. These grades are a measure of the tensile strength-to-Brinell hardness ratio. In the automotive industry, the SAE International (SAE) standard SAE J431 is used to designate grades instead of classes. Other ASTM standards that deal with gray iron include ASTM A126, ASTM A278, and ASTM A319. Class 80 is the highest class available, but it is extremely brittle.ĪSTM A247 is also commonly used to describe the graphite structure. Gray iron above class 40 requires alloying to provide solid solution strengthening, and heat treating is used to modify the matrix. Higher-strength gray irons, up to class 40, have lower carbon equivalents and a pearlite matrix. class 20 gray iron has a minimum tensile strength of 20,000 psi (140 MPa).Ĭlass 20 has a high carbon equivalent and a ferrite matrix. These orders gray iron into classes that correspond with its minimum tensile strength in thousands of pounds per square inch (ksi) e.g. In the United States, the most commonly used classification for gray iron is ASTM International standard A48. The grey iron casting products are widely used for Auto-cars, trains, trucks, vehicle components, mining machinery components, agricultural machinery parts, textile machinery parts, construction machinery parts, etc. Paint coating, electrophoretic paint coating, electro galvanizing coating, black oxide coating, phosphate treatment, powder coating, etc. Weight range: from 50 gram to 5,000 kilograms for ductile iron casting productĬNC machine, machining center, lathe, mill machine, drill machine, etc. SAE G3000 Grey Iron Material Castings Foundry Manufacturer China
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |