GB/T 27552-2021 Active National standards

GB/T 27552-2021 Destructive tests on welds in metallic materials—Microhardness testing of welded joints

Publish Date: 2021-10-11 Implement Date: 2022-05-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 27552-2021

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Welding and cutting

ICS Name: \nWelding joints

Publish Date: 2021-10-11

Implement Date: 2022-05-01

Pages: 11 pages

Scope

This document specifies the general principles, sample preparation, test procedures, test results, and test reports for microhardness testing of welded joints according to GB/T 4340.1 [with a test force range typically of 0.98 N to <49.03 N (HV 0.1 to This document is applicable to microhardness testing of cross-sections of welded joints in metal materials with large hardness gradients.
Note: The hardness test ensures that the maximum and minimum hardness of the weld metal and the two adjacent base metals (in the case of dissimilar materials) can be measured.
This document is not applicable to hardness tests with a test force greater than or equal to 49.03 N as specified in GB/T 2654.
This document is not applicable to Vickers hardness testing of resistance spot welded, convex welded, and seam welded joints as specified in GB/T 39082.
This document is not applicable to hardness testing of samples of narrow welded joints such as laser and electron beam welded joints, for which the hardness test is conducted in accordance with GB/T 35085.