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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See Specifying Duplex Systems for more information. However, the AGA does provide a compilation of specifications pertinent to galvanizing. This abstract is a brief summary of the referenced standard.
Finally, the adherence requirement is for the entire coating to have a strong adherence throughout the service life of the galvanized steel. A requires a continuous, smooth, and uniform finish with no uncoated areas including on the threads or issues that interfere with its intended use.
The LCC analysis considers not only the initial cost of the system but also the future costs maintenance, replacement, etc. This qstm 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.
The requirements for finish, appearance, and adherence are identical to those in the other main standards. The requirements in the specification facilitate the production of a high-quality zinc coating and are similar to those found in A and A Requirements concerning the renovation of uncoated areas after initial hot-dip galvanizing are contained within the material specifications A, A, A KnowledgeBase What is EN ?
Therefore, each system shall be used independently of the other. The specification requirements for coating thickness only contain minimums, there is no maximum coating thickness limitation in the specification. First, the specification details the coating thickness requirements based on bar size.
The galvanized coating shall be chromate treated. The requirements of this specification are very similar to those in A, except for the addition of threaded products and embrittlement requirements.
This specification covers prime western grade-recycled PWG-R zinc made by recycling zinc secondary materials including but not limited to drosses and skimmings. Historical Version s – view previous versions of standard. Link to Active This link will always route to the current Active version of the standard. January 25, Authored by Dr. 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 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.
ASTM A – Galvanizing Steel Bars | American Galvanizer’s Association
Was this answer helpful? 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. Purchase a copy from the AGA, or asstm your local galvanizer. The material provided herein has been developed to provide accurate and authoritative information about after-fabrication hot-dip galvanized steel.
This specification covers zinc metal made from ore or other material by a process of distillation or by electrolysis in five grades as follows: Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: 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.
This practice is applicable to chromate coatings of the colorless both one and atsmiridescent 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.
The following can cause warpage and distortion: Embrittlement is the loss or partial loss of ductility in a steel where an embrittled product characteristically fails by fracture without appreciable deformation. 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 w767.
This specification covers steel reinforcing bars with protective zinc coatings applied by dipping the properly prepared reinforcing bars into a molten bath of zinc.
The adherence requirement is the same as A, for strong bond throughout the life of the hot-dip galvanized steel. This material provides general information only and is not intended as a substitute for competent professional examination and verification as to suitability and applicability.
ASTM Specifications | American Galvanizer’s Association
The mass of the coating shall be determined by magnetic thickness gage measurements. Standard Specification for Zinc.
ASTM A Practice for Repair of Damaged and Uncoated Areas of HOt-Dip Galvanized Ast, 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 cold working of the bars causes induced stresses that may be released after the bars are immersed in the molten F zinc bath. 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.
The purpose of the calculation is to provide justification for the purchase of a higher initial cost system with a low life-cycle cost over an initially less expensive coating which has high future costs. The material categories covered in the specification include structural steel and plate, strips and a77, pipes and tubing, and wires. 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.
Standard Specification for 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 asfm be centrifuged, spun, or otherwise handled to remove the excess zinc. A retest shall be provided if the average zinc coating mass fails to meet the requirements.
The information provided herein is not intended as a representation or warranty on the part of the AGA.