GB/T 3098.3-2016 Translated English of Chinese Standard (GBT 3098.3-2016, GB/T3098.3-2016, GBT3098.3-2016): Mechanical Properties of Fasteners - Set ScrewsThis Part of GB/T 3098 specifies the mechanical and physical properties of set screws and similar threaded fasteners with specified hardness classes, which are manufactured by carbon steel or alloy steel, and tested at the environmental temperature of 10C~35C. At such environmental temperature range, assess the fasteners (including set screws and similar threaded fasteners with specified hardness classes, the same below) as per the requirements of this Part. The fasteners meeting the requirements of this Part shall be classified as per the specified hardness class, and are only applicable to the compressive stress. |
Contents
| 3 | |
Scope | 7 |
Terms and Definitions | 8 |
Codes | 9 |
Marking System | 10 |
Mechanical and Physical Properties | 11 |
Applicability of Test Method | 12 |
Mark | 21 |
Appendix A Informative Reduce Hydrogen Embrittlement after Set Screw Electroplating | 23 |
Common terms and phrases
2.942N Vickers hardness 30 Vickers units Allen wrench alloy steel Applicable scope Base metal hardness Bolts Brinell Hardness Test Carbon steel carburization test chromium complete decarburization layer compressive stress core hardness ensure the repeatability ethanol event of dispute fasteners with hardness fasteners with specified ferrite grinding or polishing Guaranteed torque hardness class 45H Hardness Classes Marks Hardness method hardness test HV0.3 heat treatment height of thread longitudinal cross-section marking system martensite mechanical and physical Mechanical Properties minimum molybdenum nitric acid physical properties pitch thread preparation The specimen Properties of Fasteners Purpose Metric Screw Quenching and tempering Rockwell hardness test scope This method screws and similar Screws and Studs similar threaded fasteners socket set screw specified hardness classes specified in GB/T specified in Table surface hardness technical requirements specified tempering 0.50 Test is applicable Test procedures thread non-decarburization layer value on Point vanadium Vickers hardness test Vickers hardness value