What is ASTM a416?

Standard Specification for Low-Relaxation, Seven-Wire Strand

ASTM License Agreement

IMPORTANT- READ THESE TERMS CAREFULLY BEFORE ENTERING THIS ASTM PRODUCT.
By purchasing a subscription and clicking through this agreement, you are entering into a contract, and acknowledge that you have read this License Agreement, that you understand it and agree to be bound by its terms. If you do not agree to the terms of this License Agreement, promptly exit this page without entering the ASTM Product.

1. Ownership:
This Product is copyrighted, both as a compilation and as individual standards, articles and/or documents ("Documents") by ASTM ("ASTM"), 100 Barr Harbor Drive, West Conshohocken, PA - USA, except as may be explicitly noted in the text of the individual Documents. All rights reserved. You (Licensee) have no ownership or other rights in the ASTM Product or in the Documents. This is not a sale; all right, title and interest in the ASTM Product or Documents (in both electronic file and hard copy) belong to ASTM. You may not remove or obscure the copyright notice or other notice contained in the ASTM Product or Documents.

2. Definitions.

A. Types of Licensees:

(i) Individual User:
a single unique computer, with an individual IP address;

(ii) Single-Site:
one geographic location or to multiple sites within one city that are part of a single organization unit administered centrally; for example, different campuses of the same university within the same city administered centrally.

(iii) Multi-Site:
an organization or company with independently administered multiple locations within one city, or an organization or company located in more than one city, state or country, with central administration for all locations.

B. Authorized Users:
any individual who has subscribed to this Product; if a Site License, also includes registered students, faculty or staff member, or employee of the Licensee, at the Single or Multiple Site.

3. Limited License.
ASTM grants Licensee a limited, revocable, nonexclusive, non-transferable license to access, by means of one or more authorized IP addresses, and according to the terms of this Agreement, to make the uses permitted and described below, each ASTM Product to which Licensee has subscribed.

A. Specific Licenses:

(i) Individual User:

(a) the right to browse, search, retrieve, display and view the Product;

(b) the right to download, store or print single copies of individual Documents, or portions of such Documents, solely for Licensee's own use. That is, Licensee may access and download an electronic file of a Document (or portion of a Document) for temporary storage on one computer for purposes of viewing, and/or printing one copy of a Document for individual use. Neither the electronic file nor the single hard copy print may be reproduced in anyway. The individual Document downloaded may not otherwise be sold or resold, rented, leased, lent or sub-licensed.

(ii) Single-Site and Multi-Site Licenses:

(a) the right to browse, search, retrieve, display and view the Product;

(b) the right to download, store or print single copies of individual Documents, or portions of such Documents for the Authorized User's personal use, and to share such copies with other Authorized Users of Licensee within Licensee's computer network;

(c) if an educational institution, Licensee is permitted to provide a hard copy of individual Documents to individual students (Authorized Users) in a class at Licensee's location;

(d) Licensee will undertake all necessary authentication and verification processes to ensure only Authorized Users can access the ASTM Product.

4. After Accessing ASTM A416 Standard for PC Strand - PC Wire

We supply seven wire pc strand with ASTM / US standard as following details.

A 416/A416M - 06 Standard Specification for Steel Strand, Uncoated Seven-Wire for Prestressed Concrete

This standard is issued under the fixed designation A 416/A416M.

Want more information on astm a416/a416m? Feel free to contact us.

1. Scope*

1.1 This specification covers two types and two grades of seven-wire, uncoated steel strand for use in pretensioned and post-tensioned prestressed concrete construction. The two types of strand are low-relaxation and stress-relieved (normal-relaxation). Low-relaxation strand shall be regarded as the standard type.

1.2 The values stated in either inch-pound units or SI units are to be regarded as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other.

2. Referenced Documents

2.1 ASTM Standards:

A 370 Test Methods and Definitions for Mechanical Testing of Steel Products
A 981 Test Method for Evaluating Bond Strength for 15.2 mm (0.6 in.) Diameter Prestressing Steel Strand, Grade 270, Uncoated, Used in Prestressed Ground Anchors
E 328 Test Methods for Stress Relaxation for Materials and Structures

3. Terminology

Definitions of Terms Specific to This Standard:

Strand, n-a group of wires having a center wire enclosed tightly by six helically placed outer wires with uniform pitch of not less than 12 and not more than 16 times the nominal diameter of the strand.

4. Ordering Information

Orders for seven-wire low-relaxation or stress-relieved (normal-relaxation) strand under this specification should include the following information:

Quantity (meters [feet]), Diameter of strand, Grade of strand, Type of strand, Packaging, ASTM designation and year of issue, and Special requirements, if any.

5. Materials and Manufacture

The base metal shall be carbon steel of such quality that when drawn to wire, fabricated into strand, and then thermally treated, shall have the properties and characteristics prescribed in this specification.

6. Mechanical Properties

Low-relaxation strand shall also be tested as prescribed in Methods E 328.

7. Dimensions and Permissible Variations

The size of the finished strand shall be expressed as the nominal diameter of the strand in millimeters [inches].

TABLE 1 Breaking Strength Requirements

TABLE 2 Yield Strength Requirements

TABLE 3 Diameter Relation Between Center and Outer Wires

8. Workmanship, Finish, and Appearance

The finished strand shall be uniform in diameter and shall be free of imperfections not consistent with good commercial strand practices.

9. Sampling

Test specimens cut from either end of the strand package are permitted. Any specimen found to contain a wire joint shall be discarded and a new specimen obtained.

10. Number of Tests

One specimen for test shall be taken from each 18-Mg [20-ton] production lot of finished strand, and tested for breaking strength, yield strength, and elongation.

11. Inspection

If outside inspection is required, the manufacturer shall afford the inspector representing the purchaser all reasonable facilities to satisfy that the material is being furnished in accordance with this specification.

12. Rejection

Failure of any test specimen to comply with the requirements of the specification shall constitute grounds for rejection of the lot represented by the specimen.

13. Certification

If outside inspection is waived, a manufacturer's certification that the material has been tested in accordance with and meets the requirements of this specification shall be the basis of acceptance of the material.

14. Packaging and Marking

The strand shall be furnished on reels or in reelless packs having a minimum core diameter of 610 mm [24 in.], unless otherwise specified by the purchaser.

S1. Bond Capacity

The results of bond-capacity tests performed in accordance with Test Method A 981 shall be submitted to the purchaser.

For more PC Steel Bar information, please contact us. We will provide professional answers.