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ASTM A/AM. Standard Specification for Zinc-Coated (Galvanized) Steel Bars for Concrete Reinforcement is exclusively applicable to hot-dip galvanizing . ASTM A/AM: Standard Specification for Zinc-Coated (Galvanized) Steel Bars for Concrete Reinforcement. ASTM A/AMa Testing Mechanical Splices for Steel Reinforcing Bars .. ASTM A/AM Zinc-Coated (Galvanized) Steel Bars for Concrete.

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Within the text, the SI units are shown in brackets.

ASTM A – Galvanizing Steel Bars | American Galvanizer’s Association

The galvanizer is identified throughout this specification as the manufacturer. Wstm Specifying Duplex Systems for more information. The material provided herein has been developed to provide accurate and authoritative information about after-fabrication hot-dip galvanized steel.

Work Item s – proposed revisions of this standard. Fabrications can have more than one material category, such as a frame assembly. The LCC analysis considers not only the initial cost of the system but also the future costs maintenance, replacement, etc.

However, the AGA does provide a compilation of specifications astj to galvanizing. Whenever different analyses of steel or different surfaces of steel are united in an assembly the galvanized finish is not generally uniform in appearance. Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: 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.

The requirements of this specification are very similar to a776 in A, except for the addition of threaded products and embrittlement requirements. The following is a summary of the various pertinent hot-dip galvanizing specifications. The values stated in each system may not be exact equivalents.

This specification covers prime western grade-recycled PWG-R zinc made by recycling zinc secondary materials including but not limited to drosses and skimmings. Embrittlement is the loss or partial loss of ductility in a steel where an embrittled product characteristically fails by fracture without appreciable deformation. This specification covers cold-formed welded and seamless carbon steel round, square, rectangular, or special shape structural tubing for welded, riveted, or bolted construction of bridges and buildings, and for general structural purposes.

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ASTM Specifications

The galvanized coating shall be chromate treated. This specification covers the requirements for hot-dip zinc coating applied to carbon steel and alloy steel bolts, screws, washers, nuts, and special threaded fasteners applied qstm the hot-dip coating process.

Common distorted and warped members of assemblies are sheets q767 plates q767 by welding or riveting. The information provided herein is not intended as a representation or warranty on the part of the AGA. Finally, there are requirements for passivating the material chromating to prevent reaction between concrete and the zinc coating, and on bend diameters.

Requirements concerning the renovation of uncoated areas after initial hot-dip galvanizing are contained within the material specifications A, A, A They can only be used if the electrical conductivity of the coating differs significantly from that of the substrate.

ASTM A767/A767M – 16

The following can cause warpage and distortion: The mass of zinc coating shall conform to specified requirements. The specification outlines three acceptable forms of touch-up: This material provides general information only and is not intended as a substitute for competent professional examination and verification as to suitability and applicability. All fabricated assemblies shall be designed with vent and drain holes such that no air is trapped during immersion of the assemblies into cleaning solutions or molten zinc.

This specification covers the chemical, mechanical, and dimensional requirements for eight grades Grades O, A, B, C, D, DH, C3, and DH3 of carbon and alloy steel nuts for general structural and mechanical uses on bolts, studs, and other externally threaded parts.

The design of the product and selection of proper steel for its suitability to withstand normal galvanizing operations is the responsibility of the designer and fabricator.

Specification for Structural Steel. A retest shall be provided if the average zinc coating mass fails to meet the requirements. Was this answer helpful? Unique to this specification is also the requirement the galvanized bars be immersed in a heated, sodium dichromate solution immediately after the process.


It may also be known by its trade name, e. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. A requires a continuous, smooth, and uniform finish with no uncoated areas including on the threads or issues that interfere with its intended use.

The requirements in the specification facilitate the production of a high-quality zinc coating and are similar to those found in A and A Therefore, each system shall be used independently of the other. Any combination of these products can be assembled into a single fabrication and then hot-dip galvanized. ASTM A Practice for Repair of Damaged and Uncoated Areas of HOt-Dip Galvanized Coatings covers appropriate methods used to repair damaged hot-dip galvanized coatings on hardware, structural shapes, and other hot-dip galvanized products, including uncoated axtm remaining after initial hot-dip galvanizing.

This specification covers zinc metal made from ore or other material by a process of distillation or by electrolysis in five grades as follows: However, there are a few additional requirements for galvanized rebar.

This post-treatment helps to prevent the formation of wet storage stain on the bars when they are in bundles at a job site and also promotes good adhesion of the galvanized rebar to the concrete astj is placed in. These notes and footnotes excluding those in tables shall not be considered as requirements of the specification.

The purpose of the calculation is to provide justification for the purchase of a higher initial cost system with a low life-cycle cost over an initially less expensive coating which has high future costs. This specification covers steel reinforcing bars with protective zinc coatings applied by dipping the properly qstm reinforcing bars into a molten bath of zinc.

The specification also calls out specific recommended before galvanizing bending radii.