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Description of ASTM-F879M 2008ASTM F879M - 02a(2008)Standard Specification for Stainless Steel Socket Button and Flat Countersunk Head Cap Screws (Metric)Active Standard ASTM F879M | Developed by Subcommittee: F16.04 Book of Standards Volume: 01.08 ASTM F879MAbstract 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. This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. 1. Scope 1.1 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. 1.2 The following three property classes are covered: 1.2.1 Austenitic Class A 1-50 in an annealed condition at 585 MPa maximum, 1.2.2 Austenitic Class A1 55 in a cold worked condition at 550 MPa minimum, and 1.2.3 Austenitic Class A 1-70 in a cold-worked condition at 700 MPa minimum. 1.3 Units The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 The following hazard caveat pertains only to Section 12, Test Methods: This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
ASTM Standards A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels A342/A342M Test Methods for Permeability of Feebly Magnetic Materials A380 Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems A555/A555M Specification for General Requirements for Stainless Steel Wire and Wire Rods A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products A967 Specification for Chemical Passivation Treatments for Stainless Steel Parts D3951 Practice for Commercial Packaging E18 Test Methods for Rockwell Hardness of Metallic Materials E92 Test Method for Vickers Hardness of Metallic Materials E384 Test Method for Knoop and Vickers Hardness of Materials F606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, and Rivets (Metric) F738M Specification for Stainless Steel Metric Bolts, Screws, and Studs F788/F788M Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series F1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection ASME Standards B 18.3.5M Hexagon Socket Flat Countersunk Head Cap Screws (Metric Series)Keywords corrosion resistant; stainless steel; socket button head cap screws; socket flat countersunk head cap screws; Countersunk head cap screws--specifications; Head cap screws; Screws--specifications; Stainless steel screws--specifications; Steel screws--specifications; ICS Code ICS Number Code 21.060.10 (Bolts, screws, studs) DOI: 10.1520/F0879M-02AR08 ASTM International is a member of CrossRef. ASTM F879MThis book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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