ASTM A574

This specification2 covers the requirements for quenched and tempered alloy steel hexagon socket-head cap screws. The screws shall be fabricated from steel which has been made by the open-hearth, basic-oxygen, or electric-furnace process. The screws shall be fabricated from alloy steel made to a fine grain practice. The screws shall be alloy steel conforming to the chemical composition specified. There shall be no evidence of carburization or total decarburization on the surfaces of the heat-treated screws when measured. Hardness, tensile strength, yield strength, and elongation shall be tested to meet the requirements prescribed.

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 requirements for quenched and tempered alloy steel hexagon socket-head cap screws, 0.060 through 4 in. in diameter where high strength is required.

Note 1—A complete metric companion to Specification A 574 has been developed-A 574M; therefore no metric equivalents are presented in this specification.

1.2 The following hazard caveat pertains only to the test method portion, Section 12, of this specification. This standard does not purport to address all of the safety concerns, 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.

2. Referenced Documents

A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
D3951 Practice for Commercial Packaging
E112 Test Methods for Determining Average Grain Size
E3 Guide for Preparation of Metallographic Specimens
E384 Test Method for Microindentation Hardness of Materials
F606 Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets
F788/F788M Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series
B1.1 Unified Screw Threads
B18.24 Part Identifying Number (PIN) Code System Standard for B18 Fastener Products
B18.3 Socket Cap, Shoulder, and Set Screws
H-28 Handbook of Thread Dimensions

Index Terms

alloy steel; cap screws; socket head; ICS Number Code 21.060.10

Citing ASTM Standards

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