T/NBHTA 003-2021 Active Group standards

T/NBHTA 003-2021 High-strength bolts

Publish Date: 2021-05-20 Implement Date: 2021-05-31 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: T/NBHTA 003-2021

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Mechanical

ICS Name: Fasteners Comprehensive

Publish Date: 2021-05-20

Implement Date: 2021-05-31

Scope

Scope: This document specifies the terms and definitions, marking, raw materials and heat treatment, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of high-strength bolts (hereinafter referred to as bolts). This document is applicable to bolts made of carbon steel or alloy steel with performance grades of 8.8 and 10.9, thread specifications of M10 to M48, and operating temperatures of -50 ℃ to +150 ℃. This document is not applicable to certain bolts with smaller shear surfaces at the head due to the geometric dimensions of the head (e.g., bolts with low head height, those with or without external threaded portions, and bolts with internal threaded portions, such as flat-round head or low-cylindrical head bolts). Main technical contents: 1. Scope 2. Normative reference documents 3. Terms and definitions 4. Marking 5. Raw materials and heat treatment 6. Technical requirements 7. Test methods 8. Inspection rules 9. Marking, packaging, transportation and storage Appendix A (Normative Appendix) - Sampling for microstructure inspection Appendix B (Informative Appendix) - Recommended technical requirements for bolt raw materials Appendix C (Normative Appendix) - Recommended requirements for bolt heat treatment