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標準ˇ公差

   Size      H6      H7      H8      H9  

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JIS G4053 LOW-ALLOY STEEL FOR MACHINE STRCUTURE USE

Symbol Chemical Composition C Si Mn P S NI Cr MO SMn420

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JIS G3509-1 LOW-ALLOY STEELS FOR COLD HEADING-WIRE RODS

Symbol Chemical Composition C Si Mn P S Ni Cr Mo SMn420

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JIS G4502 STRUCTURAL STEELS WITH SPECIFIED HARDENABILITY BANDS

Symbol JIS G4502 STRUCTURAL STEELS WITH SPECIFIED HARDE

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