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.
|Published (Last):||12 November 2014|
|PDF File Size:||15.20 Mb|
|ePub File Size:||1.76 Mb|
|Price:||Free* [*Free Regsitration Required]|
Stripping method, weighing before and after galvanizing, and microscopy method shall be used to referee the results obtained by magnetic thickness measurements. However, the AGA does provide a compilation of specifications pertinent to galvanizing. These notes and footnotes excluding those in tables shall not be astn as requirements of the specification. If rebar is awtm fabricated after the galvanized coating is applied and any flaking or cracking occurs, it is not rejectable.
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.
Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: 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. Number 12 and smaller bar must have a minimum of 3.
Types of embrittlement commonly encountered with galvanized steel are related to aging phenomena, cold working, and absorption of hydrogen. 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.
Anyone making use of this information assumes all liability arising from such use. 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.
First, the specification details the coating thickness requirements based on bar size. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Common distorted and warped members of assemblies are sheets or plates assembled by welding or riveting. The following can cause warpage and distortion: The galvanizer shall be permitted to subject the newly coated steel reinforcing bars to air or steam wiping to remove excess w767 from the bars.
LME grade, special high grade, high grade, intermediate grade, and prime western grade. Rebar is commonly bent prior to galvanizing, and the recommendations for diameter and best practices are provided in A Purchase a copy from the AGA, or z767 your local galvanizer.
This specification covers rolled steel structural shapes for use in building framing or bridges, or for general structural purposes. The values stated in each system may not be exact equivalents.
Atsm specification covers prime western grade-recycled PWG-R zinc made by recycling zinc secondary materials including but not limited to drosses and skimmings. The galvanized coating shall be chromate treated.
Are you still looking for astmm right answer? 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. Assemblies should consist of elements of similar chemistry a677 surface condition. 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.
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. The mass of the coating shall be determined by magnetic thickness gage measurements.
Steel materials and nuts axtm be manufactured, processed, and formed as appropriate for their respective grades.
The information provided herein is not intended as a representation or warranty on the part of the AGA. Galvanization shall be used to prepare reinforcing bars.
ASTM A – Galvanizing Steel Bars | American Galvanizer’s Association
Was this answer helpful? 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 sstm with the customer.
A requires a continuous, smooth, and uniform finish with no uncoated areas including on the threads or issues that interfere with its intended use. Eddy-current-type thickness measurement is a non-destructive test measuring variations in the impedance of an eddy-current inducing coil caused by coating asm variations. This specification covers steel reinforcing bars with protective zinc coatings applied by dipping the properly prepared reinforcing bars into a molten bath of zinc.
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.