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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Steel materials and nuts shall be manufactured, processed, and formed as appropriate for their respective grades. Combining values from the two systems may result in non-conformance with this specification.
ASTM A767/A767M – 16
This test method shall determine the effects of surface preparation or condition such as bar coatings on the bond strength asrm deformed steel reinforcing bars to concrete. The specification outlines three acceptable forms of touch-up: 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.
This cold working of the bars causes induced stresses that may be released after the bars are immersed in the molten F zinc bath. This post-treatment helps to prevent the formation of wet storage stain on the asttm 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.
Anyone making use of this information assumes all liability arising from such use. The galvanizer is identified throughout this specification as the manufacturer. There are coating thickness minimums, but no ast, and the threads are not subject to the coating thickness requirement. This specification covers steel reinforcing bars with protective zinc coatings applied by dipping the properly prepared atm bars into a molten bath of zinc.
ASTM A – Galvanizing Steel Bars | American Galvanizer’s Association
All fabricated assemblies shall be designed with vent and ast, holes such that no air is trapped during immersion of the assemblies into cleaning solutions or molten zinc. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Within the text, the SI units are shown in brackets. Finally, there are requirements for passivating the material chromating to prevent reaction between concrete and the zinc coating, and on bend diameters. 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.
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. Inspector Listing – Non-U.
A retest shall be provided if the average zinc coating mass fails to meet the requirements.
Link to Active This link will always route to the current Active version of the standard. Purchase a copy from the AGA, or contact your local galvanizer. The specification requirements for coating thickness only contain minimums, there is no maximum coating thickness limitation in the specification.
ASTM A767 – Galvanizing Steel Bars for Concrete Reinforcement – Rebar
The zstm is a summary of the various pertinent hot-dip galvanizing specifications. Fabrications can have more than one material category, such as a frame assembly.
Requirements concerning the renovation of uncoated areas after initial hot-dip galvanizing are contained astmm the material specifications A, A, A Rebar is commonly bent prior to galvanizing, and the recommendations for diameter and best practices are provided in A Eddy-current-type thickness measurement is a non-destructive test measuring variations in the impedance of an eddy-current inducing coil caused by coating thickness variations.
Types of embrittlement commonly encountered with galvanized steel are related to aging phenomena, cold working, and absorption of hydrogen.
Work Item s – proposed revisions of this standard. 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 asmt, 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.
The adherence requirement is the same as A, for strong bond throughout the life of the hot-dip galvanized steel. 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. The mass of the coating shall be determined by magnetic thickness gage measurements. The requirements of this specification are very similar to those in A, except for the addition of threaded products and embrittlement requirements.
Finally, the adherence requirement is for the entire coating to have a strong adherence throughout the service life of the galvanized steel.
ASTM Specifications | American Galvanizer’s Association
Standard Specification for Zinc. 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. Leave this field blank. Satm specification covers rolled steel structural shapes for use in building framing or bridges, or for general structural purposes.