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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ASTM A767 – Galvanizing Steel Bars for Concrete Reinforcement – Rebar
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. The material categories covered in the specification include structural steel and plate, strips and bars, pipes and tubing, and wires. Standard Specification for Zinc. A retest shall be provided astmm the z767 zinc coating mass fails to meet the requirements. The requirements for finish, appearance, and adherence are identical to those in the other main standards.
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.
However, if the galvanizer has to perform additional work in order to prepare the product for asttm galvanizing, such as drilling holes to facilitate drainage or venting, the galvanizer will communicate and resolve the issue with the customer.
Standard Specification atsm Zinc Coating Hot-Dip on Iron and Hardware applies to hardware products such as castings, fasteners, rolled, pressed, and forged products, and miscellaneous threaded objects that will be centrifuged, spun, or otherwise handled to remove the excess zinc.
This specification covers carbon structural steel shapes, plates, and bars of structural quality for use in qstm, bolted, or welded construction of bridges and buildings, and for general structural purposes.
Embrittlement is the loss or partial loss of ductility in a steel where an embrittled product characteristically fails by fracture without appreciable deformation.
Common distorted and warped members of assemblies are sheets or plates assembled by welding or riveting. Galvanization shall be used to prepare reinforcing bars.
Unique to this specification is also the requirement the galvanized bars be 7a67 in a heated, sodium dichromate solution immediately after the process. Combining values from the two systems may result in non-conformance with this specification. Finally, there are requirements for passivating the material chromating to prevent reaction between concrete and the zinc coating, and on bend diameters. Rebar is commonly bent prior to galvanizing, and the recommendations for diameter and best practices are provided in A The galvanizer shall be permitted to subject the newly coated xstm reinforcing bars to air or steam wiping to remove excess zinc from the bars.
The mass of the coating shall be determined by magnetic thickness gage measurements. These notes and footnotes excluding those in tables shall not be considered as requirements of the specification.
ASTM A767/A767M – 16
This specification covers steel reinforcing bars with protective zinc coatings applied by dipping the properly prepared reinforcing bars into a molten a7767 of 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. 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.
A7677 requirements of this specification are very similar to those in A, except for the addition of threaded products and embrittlement requirements.
ASTM Specifications | American Galvanizer’s Association
It may also be known by its trade name, e. Inspector Listing – Non-U. 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.
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 wstm deposited coatings. Requirements concerning the renovation of uncoated areas after initial hot-dip galvanizing are contained within the material specifications A, A, A 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.
However, there are a few additional requirements for galvanized rebar.
ASTM A – Galvanizing Steel Bars | American Galvanizer’s Association
The requirements in the specification facilitate the production of a high-quality zinc coating and are similar to those found in A and A The specification also calls out specific recommended before galvanizing bending radii. 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.
See Specifying Duplex Systems for more information. Historical Version s – view previous versions of standard. The adherence requirement is the same as A, for strong bond throughout the life of the hot-dip galvanized steel.