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 mass of zinc coating shall conform to specified requirements. Stripping method, weighing before and after galvanizing, and microscopy method shall be used to referee the results obtained by magnetic thickness measurements. Purchase a copy from the AGA, or contact your local galvanizer. The galvanizer is identified throughout this specification as the manufacturer.
Whenever different analyses of steel or different surfaces of steel are united in an assembly the galvanized finish is not generally uniform in appearance.
Within the text, the SI units are shown in brackets. There are coating thickness minimums, but no maximums, and the threads are not subject to the coating thickness requirement. Fabrications can have more than one material category, such as a frame assembly. Specification for Structural Steel.
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. 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.
The following is a summary of the various pertinent hot-dip galvanizing specifications. However, if the galvanizer has to perform additional work in order to prepare the product for hot-dip galvanizing, such as drilling holes to facilitate drainage or venting, the galvanizer will communicate and resolve the issue with the customer. Work Item s – proposed revisions of this standard. Unique to this specification is also the requirement the galvanized bars be immersed in a heated, sodium dichromate solution immediately after the process.
Therefore, each system shall be used independently of the other. This material provides general information only and is not intended as a substitute for competent professional examination and verification as to suitability and applicability. The following can cause warpage and distortion: 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 by the hot-dip coating process.
This specification covers steel reinforcing bars with protective zinc coatings applied by dipping the properly prepared reinforcing bars into a molten bath of zinc.
Combining values from the two systems may result in non-conformance with this specification. Requirements concerning the renovation of uncoated areas after initial hot-dip galvanizing are contained within the material specifications A, A, A The mass of the coating shall be determined by magnetic thickness gage measurements.
ASTM A – Galvanizing Steel Bars | American Galvanizer’s Association
These notes and footnotes excluding those in tables shall not be considered as requirements of the specification. The requirements in the specification facilitate the production of a high-quality zinc coating and are similar to those found in A and A 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 it is placed in.
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.
This test method deals with the standard procedures for establishing the relative bond strength of steel reinforcing bars in concrete using beam-end specimens.
Embrittlement is the loss or partial loss of ductility in a steel where an embrittled product characteristically fails by fracture without appreciable deformation. If rebar is bent fabricated after the galvanized coating is applied and any flaking or cracking occurs, it is not rejectable.
Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: This specification covers prime western grade-recycled PWG-R zinc made by recycling zinc secondary materials including but not limited to drosses and skimmings.
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.
Standard Specification for Zinc Hot-Dip Galvanized Coatings on Iron and Steel Products covers individual steel pieces as well as assemblies of various classes of material. This tubing shall be produced in both welded and seamless sizes and must have the chemical requirements of carbon, manganese, phosphorus, sulfur, and copper.
The material astk herein has been developed to provide accurate and authoritative information about after-fabrication hot-dip galvanized steel. 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.
The purpose of the calculation is to xstm justification for the purchase of asgm higher a76 cost system with a low life-cycle cost over an initially less expensive coating which has high future costs.
The adherence requirement is the same as A, for strong bond throughout the life of the hot-dip galvanized steel. Galvanization shall be used to prepare reinforcing bars.
The galvanizer shall be permitted to subject the newly coated steel reinforcing bars to air or steam wiping to remove excess zinc from the bars. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but atm not provided as part of the standard. Leave this field blank. This specification covers zinc metal made from ore or other material by a process of a7677 or by electrolysis in five grades as follows: 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.
Anyone making use of this information assumes all liability arising from such use. Inspector Listing – Non-U. The specification also calls out specific recommended before galvanizing bending radii. Steel materials and nuts shall be manufactured, processed, and formed a776 appropriate for their respective grades. The material categories covered asttm the specification include structural steel and plate, strips and bars, pipes and tubing, and wires. It is the responsibility of the designer and fabricator to ensure the product has been properly designed and built before the hot-dip galvanizing process supporting specifications.
This specification covers carbon structural steel shapes, plates, and bars of structural quality for use in riveted, bolted, or welded construction of bridges and buildings, and for general structural purposes.
Common distorted and warped members of assemblies are sheets or plates assembled by asym or riveting. Was this answer helpful?
Assemblies should consist of elements of similar chemistry and surface condition. This cold working of the bars causes induced stresses that may be released after the bars are immersed in the molten F zinc bath.
The requirements for finish, appearance, and adherence are identical to those in the other main standards.