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9cr2mo roll steel step bar with black surface with good hard

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    China Roll Bearing Bar, Roll Bearing Bar Manufacturers

    We have cheap steel, discount steel round bar, round bar for sale and more to meet your needs. Made in China has you covered and makes it easy to search for all kinds of Roll Bearing Bar and suppliers in China. Remember to contact Roll Bearing Bar suppliers / manufacturers / wholesalers for more information before making your decision.[mask]forging steel shaft, forging steel shaft Suppliers and [ppe]1. Grade9Cr9Cr29CrV9Cr2W9Cr2Mo 2. SizeDIA 80 800mm 3. StandardAISI, ASTM, BS, DIN, GB, JIS 4. CertificationISO9001, SGS, BV,ABS Product Name Forged working roll Material Alloy steel Surface Black or Rough turned Standard AISI, ASTM, BS, DIN, GB, JIS Grade 4140/4130/ 4145/ 4340/42CRMO/42CRMO4 Heat treatment Annealed,normalized,quenching and tempering ,according [mask]

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