This file is in GB/T 1.1 -- 2020 "Standardization work Guidelines, Part 1: Standardization document structure and drafting rules" provisions drafted。

       This document replaces GB/T 2650-2008 "Welding Joint impact test Method", compared with GB/T 2650-2008, in addition to structural adjustment and editorial changes, the main technical changes are as follows:

       a) The "scope" has been changed (see Chapter 1, 2008 edition, Chapter 1);

       b) A chapter on Terms and definitions has been added (see chapter 3);

       c) Change "principles" to "general principles" and add related requirements (see Chapter 4, Chapter 3 of the 2008 edition);

       d) Change "symbol and description" to "sample code" and add the relevant content of characters (see Chapter 5, Chapter 4 of the 2008 edition);

       e) Change "symbol example" to "Code example", remove reference lines (see Chapter 6, Chapter 5 of the 2008 edition)。

       This document is modified to adopt ISO 9016:2022 "Destructive Tests for Weld Seams of Metal materials" Impact test sample location, notch direction and test method.。

       The following structural changes are made to this document compared to ISO 9016:2022:

       - Will ISO 9016:2022 5.1 The relevant contents of sample sampling methods in the Sampling Code System are included in the General Rules (see Chapter 4).。

       The technical differences between this document and ISO 9016:2022 and their reasons are as follows:

       - ISO148-1 has been replaced with the normative reference to GB/T 229 (see chapters 4, 7 and 8) to adapt to our technical conditions and increase operability;

       -- Change the reference line RL of "H" in "Second character" to the vertical line leading from the surface of the base metal from the intersection point of the longitudinal central axis of the sample and the fusion line/pressure welding bond line，Change the "S" in the "third character" to indicate that the notched surface is parallel to the joint/specimen surface，Change the "T" in the third character to indicate that the notch surface is perpendicular to the joint/specimen surface (the notch crosses the joint/specimen thickness)(see 5.2, Table 1 and Table 2) to improve operability and remove ambiguity。

       The following minimal editorial changes have been made to this document:

       - In order to harmonize with existing standards, the name of the standard is changed to "Impact Test for Destructive Welding seams of Metal materials";

       -- References were deleted。

      Wanji's pendulum impact testing machine is suitable for this standard。