GB/T 9450-2025 Active National standards

GB/T 9450-2025 Determination of the case hardening depth for steel

GB/T 9450-2025 Determination of the case 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 9450-2025

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, testing equipment, samples, measurement methods, result evaluation, and test reports for the depth of carburizing and carbon-nitrogen co-carburizing quenching hardening layers on steel parts.
This document is applicable to workpieces that have undergone carburizing or carbon-nitrogen co-carburizing followed by quenching and tempering heat treatment.

Development Information

Word Count: 15 Thousand words Pages: 16 pages

Replace the following standards

GB/T 9450-2005 Steels—Determination and verification of the depth of carburized and hardened cases

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