ASTM A368-2019 pdf free download

ASTM A368-2019 pdf free download.Standard Specification for Stainless Steel Wire Strand
4. General Requirements for Delivery
4.1 In addition to the requirements of this specification, all requirements of the current edition of Specification A555/ A555M shall apply. Failure to comply with the general requirements of Specification A555/A555M constitutes non- conformance with this specification.
5. Stranding
5.1 Three-wire strand shall have a left lay with a uniform pitch of not less than 10 nor more than 16 times the nominal diameter ofthe strand. Seven-wire strand and the outer layer of 19-wire strand, shall have a left lay with a uniform pitch of not less than 12 nor more than 16 times the nominal diameter ofthe strand. A left lay is defined as a counter-clockwise twist away from the observer. All wires shall be stranded with uniform tension. Stranding shall be sufficiently close to ensure no appreciable reduction in diameter when stressed to 10 % of the specified strength. 5.2 All wires in the strand shall lie naturally in their true positions in the completed strand, and when the strand is cut, the ends shall remain in position or be readily replaced by hand and then remain in position. This may be accomplished by any means or process, such as preforming, post forming, or form setting. 6. Joints 6.1 There shall be no strand joints or strand splices in any length of the completed strand. 6.2 In 3-wire strand, there shall be no joints in the individual wires. 6.3 In 7-wire strand, joints in individual wires shall be acceptable provided there is not more than one joint in any 150-ft (46-m) section of the completed strand and the location of each wire joint is marked on the strand with paint or some other distinguishing mark. 6.4 In 19-wire strand, joints in the individual wires of the outer layer of12 wires shall be acceptable provided there is not more than one joint in any 150-ft (46-m) section and the location of each wire joint is marked on the strand with paint or some other distinguishing mark. Joints in the 7-wire inner layer of19-wire strand shall be acceptable provided there is not more than one joint in any 150-ft section. 6.5 Joints in the individual wires shall be flash or upset butt-welded. Care shall be taken to prevent injury to the wire during welding.
7. Chemical Composition
7.1 The steel shall be Type 302, 304, 305, 316, 316Cb, or 316Ti and shall conform to the requirements as to chemical composition specified in Table 2. 7.2 Methods and practices relating to chemical analysis required by this specification shall be in accordance with Test Methods, Practices, and Terminology A751.
8. Mechanical Requirements
8.1 The tensile strength requirements, based upon the nomi- nal strand diameter and the number of wires in each strand, shall conform to the requirements specified in Table 1. All tension tests shall be made upon lengths of strand that do not contain welds in the individual wires. 8.2 The individual wires of the completed strand shall not fracture when wrapped in a close helix of at least two turns upon itself as a mandrel at a rate not exceeding 15 turns/min.
9. Dimensions, Mass, and Permissible Variations
9.1 The nominal diameter of the finished strand and of the individual wires, the number of wires per strand, and the approximate weight per 1000 ft (or per 304.80 m) of strand are shown in Table 1. 9.2 The diameter of the individual wires forming the strand shall not vary from the nominal wire diameters by more than 60.001 in. (60.025 mm).
10. Workmanship, Finish, and Appearance
10.1 The finished strand shall be tight, smooth, and free of imperfections not consistent with good commercial practice. 10.2 The diameter of the finished strand shall be uniform, except for a minor increase in diameter due to a wire joint.