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prSSH ISO 9177-3:2022

Mechanical pencils for technical drawings — Part 3: Black leads — Bending strengths of HB leads

General information

40.60     May 10, 2024

DPS

DPS/KT 304

International Standard

01.100.40     97.180  

Scope

This document specifies bending strengths and a test method for black leads of HB hardness degree used for mechanical pencils for technical drawings.

Life cycle

PREVIOUSLY

PUBLISHED
SSH ISO 9177-3:1994

NOW

IN_DEVELOPMENT
prSSH ISO 9177-3:2022
40.60 Close of voting
May 10, 2024

Related project

Adopted from ISO 9177-3:2022

Adopted from ISO 9177-3:2022