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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These notes and footnotes excluding those in tables shall not be considered as requirements of the specification. There are coating thickness minimums, but no maximums, and the threads are not subject to the coating thickness requirement. A requires a continuous, smooth, and uniform finish with no uncoated areas including on the threads or issues that interfere with its intended use. Types of embrittlement commonly encountered with galvanized steel are related to aging phenomena, cold working, and absorption of hydrogen.
Link to Active This link will always route to the current Active version of the standard. Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated A77 s: If rebar is bent fabricated after the galvanized coating is applied and any flaking or cracking occurs, it is not rejectable.
This tubing shall be produced in both welded and seamless sizes and must have the chemical requirements of carbon, manganese, phosphorus, sulfur, and copper. Heat analysis shall be used to determine the percentage of carbon, manganese, phosphorus, sulfur, vanadium, nickel, chromium, molybdenum, aa767, and copper for the required chemical composition.
This test method asm with the standard procedures for establishing the relative bond strength of steel reinforcing bars in concrete using beam-end specimens. Galvanization shall be used to prepare reinforcing bars.
The following is a summary of the various pertinent hot-dip galvanizing specifications. Was this answer helpful? The LCC analysis considers not only the initial cost of the system but also the future costs maintenance, replacement, etc.
KnowledgeBase What is Wstm ? Any combination of these products can be assembled into a single fabrication and then hot-dip galvanized. Fabrications can have more than one material category, such as a frame assembly.
This specification covers the chemical, mechanical, and dimensional requirements for eight grades Grades O, A, B, Aetm, 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.
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. Eddy-current-type thickness measurement is a non-destructive test measuring variations in the impedance of an eddy-current inducing coil caused asmt coating thickness variations. The requirements of this specification are very similar to those in A, except for the addition of threaded products and embrittlement requirements.
The specification requirements for coating thickness only contain minimums, there is no maximum coating thickness limitation in the specification.
The requirements for finish, appearance, and adherence are identical to those in the other main standards.
ASTM A – Galvanizing Steel Bars | American Galvanizer’s Association
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.
Rebar is commonly bent prior to galvanizing, and the recommendations for diameter and best practices are provided in A However, there are a few additional requirements for galvanized rebar. Standard Specification for Zinc Hot-Dip Galvanized Coatings on Iron and Steel Products covers individual steel pieces as well as assemblies of various astk of material.
Work Item s – proposed revisions of this standard. The galvanized coating shall be chromate treated. Are you still looking for the right answer? The specification also calls out specific recommended before galvanizing bending radii. The values stated in each system may not be exact equivalents.
The specification outlines three acceptable forms of touch-up: This abstract is a brief summary of the referenced standard. This specification covers zinc metal made from ore or other material by a process of distillation or by electrolysis in five grades as follows: Assemblies should consist of elements of similar chemistry and surface condition. LME grade, special high grade, awtm grade, intermediate grade, and prime western grade.
ASTM A767 – Galvanizing Steel Bars for Concrete Reinforcement – Rebar
They can only be used if the electrical conductivity of the coating differs significantly from that of the substrate. Specification for Structural Steel. This specification covers rolled steel structural shapes for use in zstm framing or bridges, or for general structural purposes.
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.
This specification covers cold-formed welded and seamless asfm steel awtm, square, rectangular, or special shape structural tubing for welded, riveted, or bolted construction of bridges and buildings, and for general structural purposes.
ASTM Specifications | American Galvanizer’s Association
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. The following can cause warpage and distortion: Inspector Listing – Non-U. A retest shall be provided if the average zinc coating mass fails to meet the requirements.
Unique to this specification is also the requirement the asfm bars be immersed in a heated, sodium dichromate solution immediately after the process. The galvanizer is identified throughout this specification as the manufacturer.
This post-treatment helps to prevent the formation of wet storage stain on the bars when they are in bundles at astmm job site and also promotes good adhesion of the galvanized rebar to the concrete it is placed in. 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.
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, 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 issue with the customer.
This test method shall determine the effects of surface aatm or condition such as bar coatings on the bond strength of deformed steel reinforcing bars to concrete. However, the AGA does provide a compilation of specifications pertinent to galvanizing.
The material provided herein has been developed to provide accurate and authoritative information about after-fabrication 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.