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JB/T 6979-1993Large and medium steel forged die blocks - Quality grading (ultrasonic and inclusions) (English PDF)

大中型钢质锻制模块（超声波和夹杂物）质量分级

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Issued by

MIIT

Level / Type

Industry · Recommended

Issue date

July 27, 1993

Implementation date

July 1, 1994

Scope

JB/T 6979-1993 is the English-translated version of 大中型钢质锻制模块（超声波和夹杂物）质量分级.

JB/T 6979-1993 is the Chinese machinery industry standard covering large and medium steel forged die blocks - Quality grading (ultrasonic and inclusions). It was issued on 27 July 1993 and has been in force since 1 July 1994, as a first edition.

The document is under the responsibility of the Ministry of Industry and Information Technology. This page is published from the official record of the 1993 edition.

The figures, limits and tables the standard contains are those of the document itself, delivered in full with the English translation.

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Document preview — JB/T 6979-1993

National Standard of the People's Republic of China

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

[Preview only]
1 Scope
2 Normative references
3 Terms and definitions
3.1 Type
3.2 Basic parameters
4 Types and basic parameters
4.1 Types
4.2 Model designation
4.3 Nominal operating conditions
4.4 Safety and hygiene
4.5 Welding
4.6 Bridge (After crane operation mechanism assembled)
4.7 Assembly
4.8 Electrical control equipment
4.9 Steel pretreatment and painting
5 Technical requirements
5.1 General requirements
5.2 Safety requirements
5.3 Cold and hot working forming
5.4 Rated load test
5.5 Whole machine noise test
5.6 Static rigidity test
5.7 Dynamic load test
5.8 Crane span deviation
5.9 Diagonal difference of bridge
6 Test methods
6.1 Exit-factory inspection
6.2 Type inspection
7 Inspection rules
7.1 Marking
7.2 Packaging, transportation and storage
7.3 Transportation
7.4 Storage
8 Marking, packaging, transportation and storage
9 标志和标签 9 Marking and labeling

1 Foreword

JB/T 6979-1993 was issued by Ministry of Industry and Information Technology of the People's Republic of China on 27 July 1993 and has been in force since 1 July 1994.

The JB/T prefix marks a recommended standard. It is not law in itself: it becomes binding when a contract names it, when a regulation or a mandatory standard refers to it, or when a producer declares conformity with it.

The document runs to 15 pages in English translation.

2 Scope Preview

JB/T 6979-1993 carries no ICS number and no Chinese Standard Classification code.

This catalogue holds 21,922 other JB/T standards.

Of the 5,298 JB/T standards that do carry an ICS number, 1,460 (28%) fall under ICS 25, in the field of manufacturing engineering.

3 About this standard

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

English translation: about 15 pages

4 Related standards

Standards on related subjects:

GB/T 45677-2025 — Forming moulds of composite material for upper cover of new energy vehicle battery pack

GB/T 6110-2021 — Drawing dies—Carbide alloy drawing dies—Structural types and dimensions

JB/T 6057-1992 — Steels for moulding parts of plastic moulds and their heat treatment - Technical specifications

JB/T 7644-2025 — Die - Single punch template

JB/T 7643-2025 — Die - template

JB/T 5825-2025 — Die - Round punch

5 Classification and status

Chinese Standard Classification (CCS): J 32

Prefix JB/T: recommended standard.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Cited by

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