Standard:

    API 5L & API 5CT

    ASTM A106 GR B       ASTM A53 GR B

    SAE 1020                  SAE 1045

    JIS G4051 S20C         JIS 3454 STPG42

    JIS G3454 STGP 370  JIS 3454 STPG42

    DIN ST 45-8                DIN ST 42-2

Tolerate:

    OD            +1%/-1%

    Thickness  +12.5%/-10%

    Length       20mm Tolerate:

    OD            +1%/-1%

    Thickness  +12.5%/-10%

    Length       20mm

wind power part