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

ASTM Specifications | American Galvanizer’s Association

This specification covers the requirements for hot-dip zinc coating applied to carbon steel and alloy steel bolts, screws, washers, nuts, atm special threaded fasteners applied by the hot-dip coating process. This abstract is a brief summary of the referenced standard.

Purchase a copy from the AGA, or contact your local galvanizer. Number 12 and smaller bar must have a minimum of 3.

ASTM Specifications

However, there are a few additional requirements for galvanized rebar. Are you still looking for the right answer?

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 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.

KnowledgeBase What is EN ? Standard Specification for Zinc.

Inspector Listing – Non-U. Fabrications can have more than one material category, such as a frame assembly.

ASTM A767 – Galvanizing Steel Bars for Concrete Reinforcement – Rebar

This tubing shall be produced in both welded and seamless sizes and must have the chemical requirements of carbon, manganese, phosphorus, sulfur, and copper. Specification ast, Structural Awtm. Steel materials and nuts shall be ast, processed, and formed as appropriate for their respective grades. Types of embrittlement commonly encountered with galvanized steel are related to aging phenomena, cold working, and absorption of hydrogen. Therefore, each system shall be used independently of the other.


If rebar is bent fabricated after the galvanized coating is applied and any flaking or cracking occurs, it is not rejectable. They can only be used if the electrical conductivity of the coating differs significantly from that of the substrate. There are coating thickness minimums, but no maximums, and the threads are not subject to the coating thickness requirement. This specification covers carbon structural steel shapes, plates, and bars of structural quality for a76 in riveted, bolted, or welded construction of bridges and buildings, and for general structural purposes.

This test method shall determine the effects of surface preparation or condition such as bar coatings on the bond strength of deformed steel reinforcing bars to concrete.

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

The specification outlines three acceptable forms of touch-up: Within the text, the SI units are shown in brackets. A retest shall be provided if the average zinc coating mass fails to meet the requirements. This specification covers prime western grade-recycled PWG-R zinc made by recycling zinc secondary materials including but not limited to drosses and skimmings.

Any combination of these products can be assembled into a single fabrication and then hot-dip galvanized. The galvanizer shall be permitted to subject the newly coated steel reinforcing bars to xstm or steam wiping to remove excess zinc from the bars.

First, the specification details the coating thickness requirements based on bar size. It is important to note reinforcing steel used in conjunction with structural steel, welded to a fabricated assembly is not governed by ASTM A but rather ASTM A, the standard specification for zinc coatings on iron and steel products.

This specification covers steel reinforcing bars with protective zinc coatings applied by dipping the properly prepared reinforcing bars into a molten bath of zinc. 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 areas remaining after initial hot-dip galvanizing.

  ASTM D1050 PDF

It is the responsibility of the designer and fabricator to ensure the product has been properly a7767 and built before the hot-dip galvanizing process supporting specifications.

Standard Specification for Zinc Coating Hot-Dip on Iron and Hardware applies to hardware products such as castings, fasteners, rolled, pressed, and forged products, and miscellaneous threaded objects that will be centrifuged, spun, or aa767 handled to remove the excess zinc.

The adherence requirement is the same as A, for strong bond throughout the life of the hot-dip galvanized steel.

Finally, the adherence requirement is for the entire coating to have a strong adherence throughout the service life of the galvanized steel. Embrittlement aetm the loss or partial loss of ductility in a steel where an embrittled product characteristically fails by fracture without appreciable deformation. This specification covers zinc metal made from ore atsm other material by a process of distillation or by electrolysis in five grades as follows: This specification covers black and hot-dipped galvanized hot-formed welded and seamless carbon steel square, round, rectangular, or special shape structural tubing for welded, riveted, or bolted construction or bridges and buildings, and for general structural purposes.

Whenever different analyses of steel or different surfaces of steel are united in an assembly the galvanized finish is not generally uniform in appearance. 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.

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