ASTM A911/A911M-21

Standard Specification for Low-Relaxation Steel Bars for Prestressed Concrete Railroad Ties

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STANDARD published on 15.4.2021

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The information about the standard:

Designation standards: ASTM A911/A911M-21
Publication date standards: 15.4.2021
SKU: NS-1023948
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM

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Steels for reinforcement of concrete

Annotation of standard text ASTM A911/A911M-21 :

This specification covers uncoated, stress-relieved steel bars for prestressed concrete railroad ties. Analysis of the steel shall conform to the chemical requirements specified by the specification. Mechanical requirements including test method, tensile strength, yield strength, elongation and wrapping test are provided. One test specimen each for the tensile test and the wrapping test shall be taken for every 10 coils or fraction thereof in a lot.

Keywords:
low-relaxation bars, prestressed concrete, railroad ties, steel bars, stress-relieved,, ICS Number Code 77.140.15 (Steels for reinforcement of concrete)

Additional information

1. Scope

1.1?This specification covers low-relaxation steel bars for use in prestressed concrete railroad ties.

1.2?This specification is applicable for orders in either inch-pounds units (as Specification A911) or in SI units (as Specification A911M).

1.3?The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the specification.

1.4?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

2. Referenced Documents

Fed.Std.No.123	Marking for Shipments (Civil Agencies)
MIL-STD-129	Marking for Shipment and Storage
A370-23	Standard Test Methods and Definitions for Mechanical Testing of Steel Products
E328-21	Standard Test Methods for Stress Relaxation for Materials and Structures

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