ASTM A767 PDF
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 following can cause warpage and distortion: They can only be used if the electrical conductivity of the coating differs significantly from that of the substrate. Finally, the adherence requirement is for the entire coating to have a strong adherence throughout the service life of the galvanized steel.
It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
Stripping method, weighing before and after galvanizing, and microscopy method shall be used to referee the results obtained by magnetic thickness measurements. The specification outlines three acceptable forms of touch-up: Within the text, the SI units are shown in brackets. 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.
The requirements in the specification facilitate the production of a high-quality zinc coating and are similar to those found in A and A Work Item s – proposed revisions of this standard.
The values stated in each system may not be exact equivalents. Rebar is commonly bent prior to galvanizing, and the recommendations for diameter and best practices are provided in A The following is a summary of the various pertinent hot-dip galvanizing specifications. However, the AGA does provide a compilation of specifications pertinent 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.
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. These notes and footnotes excluding those in tables shall not be considered as requirements of the specification.
ASTM Specifications | American Galvanizer’s Association
A requires a continuous, smooth, and uniform finish with no uncoated areas including on the threads or issues that interfere with its intended use.
Heat analysis shall be used to determine the percentage of carbon, manganese, phosphorus, sulfur, vanadium, nickel, chromium, molybdenum, columbium, and copper for the required chemical composition. It may also be known by its trade name, e.
This cold working of the bars a776 induced stresses that may be released after the bars are immersed in the molten F zinc bath. Types of embrittlement commonly encountered with galvanized steel are related to aging phenomena, cold working, and absorption of hydrogen.
This material provides general information only and is not intended as a substitute for competent professional examination and verification as to suitability and applicability.
This specification covers black and hot-dipped galvanized hot-formed welded and seamless carbon steel square, ast, rectangular, or special shape structural tubing for welded, riveted, or bolted construction or bridges and buildings, and for general structural purposes.
A retest shall be provided if the average zinc coating mass fails to meet the requirements.
ASTM A – Galvanizing Steel Bars | American Galvanizer’s Association
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.
This specification covers zinc metal made from ore or other material by a process of distillation or by electrolysis in five grades as follows: 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 a7667 of the galvanized rebar to the concrete it is placed in. Asfm Documents aatm separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
The information provided herein is not intended as a representation or warranty on the part of the AGA. 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.
This test method deals with the standard procedures for establishing the relative bond strength aetm steel reinforcing bars in concrete using beam-end specimens. Finally, there are requirements for passivating the material chromating to prevent reaction between concrete and the zinc coating, and on bend diameters.
LME grade, special high grade, high grade, intermediate grade, and prime western grade. This abstract is a brief summary of the referenced standard.
Common distorted and warped members of assemblies are sheets or plates assembled by welding or riveting. 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. Unique to this specification is also the requirement the galvanized bars be immersed in a heated, sodium dichromate solution immediately after the process.
This test method shall determine the effects of surface preparation a7677 condition such as bar coatings on the bond strength of deformed steel reinforcing bars to concrete. 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.