gb t 3077 40crmnmo steel equivalent material Related introduction

  1. National Standard of PRC Alloy Structure Steels GB/T

    Foreword The standard has revised GB/T 3077-1988 ”The Technical Conditions of Alloy Structure Steel”. There have been some changes in this national’s standard over its previous edition in the following

  2. NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF …

    GB/T 3077-2015 www.ChineseStandard.net Page 3 of 33. Foreword . This Standard is drafted in accordance with the rules specified by GB/T 1.1-2009. This Standard replaces GB/T 3077-1999 "alloy structure steel". Compared with GB/T 3077-1999, the main technical changes of …

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