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ASTM F879-23
Standard Specification for Stainless Steel Socket Button, Low and Flat Countersunk Head Cap Screws
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STANDARD published on 1.6.2023
The information about the standard:
Designation standards: ASTM F879-23
Publication date standards: 1.6.2023
SKU: NS-1147608
The number of pages: 7
Approximate weight : 21 g (0.05 lbs)
Country: American technical standard
Category: Technical standards ASTM
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Annotation of standard text ASTM F879-23 :
This specification covers the chemical and mechanical requirements for stainless steel metric hexagon socket button (SBHCS) and flat countersunk (SFHCS) head cap screws with nominal thread M 3 through M 20 intended for use in applications requiring general corrosion resistance. These steels are designated into three classes: Austenitic Class A 1-50 in an annealed condition, Austenitic Class A1-55 in a cold worked condition, and Austenitic Class A 1-70 in a cold worked condition. The austenitic stainless steel socket screw shall be designated F879M A1-50, F879M A1–55, or F 879M A1-70. Screws shall be formed by upsetting or extruding, or both. Also, these screws shall be roll threaded. Austenitic alloys ClassA 1-50 screws, following manufacture, shall be annealed by heating to a certain temperature to obtain maximum corrosion resistance and minimum permeability. The screws shall be held for a sufficient time at temperature, then cooled at a rate sufficient to prevent precipitation of the carbide and provide the properties specified. Different tests shall be conducted in order to determine the following mechanical properties of screws: tensile strength, minimum extension, yield strength, elongation, Vickers hardness, and Rockwell hardness.
Keywords:
corrosion resistant, socket button head cap screws, socket flat countersunk head cap screws, socket low head cap screws, stainless steel,, ICS Number Code 21.060.10 (Bolts, screws, studs)
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