Classification Of Steel Essay

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Classification of steel
The steel are classified by various methods and each method is based on definite criteria. The various criteria are
• Amount of carbon.
• Amount of alloying element in carbon.
On the basis of carbon : carbon has strong influence on the properties of steel as the carbon increase , hardness , tensile strength , fatigue resistance and harden ability increase and ductility , malleability , malleability , formability , toughness , mach inability and weld ability decrease . The name of these classes will indicate some general level of properties of steel from their group.

• Low carbon steels (0.008%-.3%)
• Medium carbon steel (0.3-0.6%)
• High carbon steel (0.6%-2%)
Low carbon steel: they are soft, ductile , malleable , …show more content…

such steel are classified on the basis of total alloy content
• Low steel
• High steel
Low alloy steel contain alloying element less than 10% and high alloy steel contain more than 10%.
Information about any iteams like product classification including its physical staus , chemical compostion , quality product . additional information about the products like special tolerance , surface preparation edges finishes , special indeifcation , packing and loading instruction are also provided in the specification. Engineering societies or association and institutes whsose member make , specify or purchase steel products publish standard specification. Many such specification are well known and highly respected. Some of the important specification ASTM,AISI and SAE.
BRITISH STANDARD OF SPecifcation
BS 970 uses alphanumerical symbol with 6 charchter for specifiifying steel. The 6 charcter are explained as follow …show more content…

these steel are useful for application requirering maximum wear and abrasion resistance. They are deep hardening alloys suitable for sever characterized by fatigue , abrasion, impact , high temperature stresses or combination of such condition in small and large section. This steel is available hot and cold rolled sheet and strip , hot rolled and cold finished bar , cold heading quality , aircraft quality and premium aircraft quality bar and seamless tube . they are used for small gears , pinion , ball studs , high strength belt , cap screws , socket , recessed head screw which can be heat treated after machining and forming

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