GB/T 5617-2025 Active National standards

GB/T 5617-2025 Determination of surface hardening depth for steel

GB/T 5617-2025 Determination of surface hardening depth for steel

Publish Date: 2025-08-29 Implement Date: 2026-03-01 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 5617-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Heat treatment

ICS Name: Heat treatment

Publish Date: 2025-08-29

Implement Date: 2026-03-01

Pages: 16 pages

Scope

This document specifies the principles of measuring the depth of the surface hardened layer and the total hardened layer depth on steel parts, as well as the testing equipment, samples, measurement methods, result evaluation, and test reports.
This document is applicable to parts subjected to surface hardening processes such as induction hardening, flame hardening, laser hardening, and electron beam hardening.

Development Information

Word Count: 16 Thousand words Pages: 16 pages

Replace the following standards

GB/T 5617-2005 Determination of effective depth of hardening after induction or flame hardening of steel

Referenced Standards

GB/T 4340.1-1999 Metallic materials—Vickers hardness test—Part 1:Test method GB/T 4340.1-2009 Metallic materials—Vickers hardness test—Part 1:Test method GB/T 4340.1-2024 Metallic materials—Vickers hardness test—Part 1:Test method GB/T 4340.2-1999 Metallic vickers hardness test—Part 2:Verification of hardness testers GB/T 4340.2-2012 Metallic materials—Vickers hardness test—Part 2:Verification and calibration of testing machines GB/T 4340.2-2025 Metallic materials—Vickers hardness test—Part 2:Verification and calibration of testing machines GB/T 7232-1999 Terminology of metal heat treatment GB/T 7232-2012 Terminology of metal heat treatment GB/T 7232-2023 Metal heat treatment—Terminology GB/T 18449.1-2001 Metallic knoop hardness test Part 1:Test method GB/T 18449.1-2009 Metallic materials—Knoop hardness test—Part 1:Test method GB/T 18449.1-2024 Metallic materials—Knoop hardness test—Part 1:Test method GB/T 18449.2-2001 Metallic knoop hardness test—Part 2:Verification of hardness testers GB/T 18449.2-2012 Metallic materials—Knoop hardness test—Part 2:Verification and calibration of testing machines

Related Standards

GB/T 9451-1988 Replaced

GB/T 9451-1988 Determination of total or effective thickness of thin surface hardened layers of steel parts

Publish Date: 1988-06-24

GB/T 12603-1990 Replaced

GB/T 12603-1990 Classification and designation on metal heat treatment

Publish Date: 1990-12-18

GB/T 13324-1991 Replaced

GB/T 13324-1991 Terminology of heat treatment installation

Publish Date: 1991-12-13

GB 15735-1995 Replaced

GB 15735-1995 Requirements for the safety and health in production process of metal heat treatment

Publish Date: 1995-09-26

GB/T 7232-1999 Replaced

GB/T 7232-1999 Terminology of metal heat treatment

Publish Date: 1999-09-03

GB/T 18177-2000 Replaced

GB/T 18177-2000 Gas nitriding of steel parts

Publish Date: 2000-08-28