steel grade

Around in this world there has approx 2 lakh of steel grade is found .In which there are some grade of steel if (interstantial free),HRPO (hot roll pickled oil,HRSPO (hot roll skin pickled oil),DQ (deep quality),DQFH( deep quality full hard).some grade of steel is used in refrigerator,pipes,vessel, drum etc. but  highly grade of steel is used in automobile sector.These steel has high quality and long life and high mechanical property.  

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