JJG 831-2021 Active National Metrology and Inspection Regulations JJG

JJG 831-2021 Hardness Testers for Casting Moulds of Sand

Publish Date: 2021-12-28 Implement Date: 2022-06-28 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: JJG 831-2021

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: -

Publish Date: 2021-12-28

Implement Date: 2022-06-28

Publisher: 国家市场监督管理总局

Technical Committee: 全国力值硬度重力计量技术委员会

Pages: 20 pages

Scope

本规程适用于手持或配有固定支架的铸造用砂模硬度计的首次检定、后续检定和使用中检查。

Development Information

Drafting Units:

广东省计量科学研究院、河北省计量监督检测研究院、中山市质量计量监督检测所、辽宁省计量科学研究院

Drafting Persons:

何广霖、王小终、麦伟明、刘伟

Word Count: 23 Thousand words Pages: 20 pages

Replace the following standards

JJG 831-1993 Green Sand Mould Surface Hardness Tester for Castings

Referenced Standards

JJG 144-2007 Standard Dynamometers 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

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