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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They can only be used if the electrical conductivity of the coating differs significantly from that of the substrate. This specification covers zinc metal made from ore or other material by a process of distillation or by astk in five grades as follows: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM A767 – Galvanizing Steel Bars for Concrete Reinforcement – Rebar
The mass of zinc coating shall conform to specified requirements. This practice is applicable to chromate coatings of the colorless both one and two-dipiridescent yellow or bronze, olive drab, black, colorless anodic, yellow or black anodic types, and of the dyed variety, when applied to surfaces of electrodeposited zinc, mechanically deposited zinc, hot-dipped zinc, rolled zinc, electrodeposited cadmium, or mechanically deposited coatings. Whenever different analyses of steel or different surfaces of steel are united in an assembly the galvanized finish is not generally uniform in appearance.
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. 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.
Within the text, the SI units are shown in brackets. This abstract is a brief summary of the referenced standard.
The mass of the coating shall be determined by magnetic thickness gage measurements. This specification covers steel reinforcing bars with protective zinc coatings applied by dipping the properly prepared reinforcing bars into a molten bath of zinc. First, the specification details the coating thickness requirements based on bar size. Are axtm still looking for the right answer? The requirements of this specification are very similar to those in A, except for the addition of threaded products and embrittlement requirements.
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.
However, there are a few additional requirements for galvanized rebar. 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 material categories covered in the specification include structural steel and plate, strips and bars, pipes and tubing, and wires. Standard Specification for Zinc.
Finally, there are requirements for passivating the material chromating to prevent reaction between concrete and the zinc coating, and on bend diameters.
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 specification covers prime western grade-recycled PWG-R zinc made by recycling zinc secondary materials including but not limited to drosses and skimmings. The information provided herein is not intended as a representation or warranty on the part of the AGA.
W767 specification outlines three aa767 forms of touch-up: See Specifying Duplex Systems for more information. Any combination of these products can be assembled into a single fabrication w767 then hot-dip galvanized.
This tubing shall be produced in both welded and seamless sizes and must have the chemical requirements of carbon, manganese, phosphorus, sulfur, and copper. However, the AGA does provide a compilation of specifications pertinent to galvanizing.
Leave this field blank. The material provided herein has been developed to provide accurate and authoritative information about after-fabrication hot-dip galvanized steel.
ASTM A – Galvanizing Steel Bars | American Galvanizer’s Association
It may also be known by its trade name, e. Anyone making use of this information assumes aastm liability arising from such use. 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. Unique to this specification is also the requirement the galvanized bars be immersed in a heated, sodium dichromate solution immediately after the process.
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. Stripping method, weighing before and after galvanizing, and microscopy method shall be used to referee the results obtained by magnetic thickness measurements. Rebar is commonly bent prior to galvanizing, and the recommendations for diameter and best practices are provided in A The following can cause warpage and distortion: Steel materials and nuts shall be manufactured, processed, and formed as appropriate for their respective grades.
Requirements concerning the renovation of uncoated areas after initial hot-dip galvanizing are contained within the material specifications A, A, A The LCC analysis considers not only the initial cost of the system but also the future costs maintenance, replacement, etc. Historical Version s – view previous versions of standard. There are coating thickness minimums, but no maximums, and the threads are not subject to the coating thickness requirement.
This cold working of the bars causes z767 stresses that may be released after the bars are immersed in the molten F aa767 bath. It is important to note reinforcing steel used in a776 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 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 test method deals with the standard procedures for establishing the relative bond strength of steel reinforcing bars in concrete using beam-end specimens.