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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The requirements of this specification are very asfm to those in A, except for the addition of threaded products and embrittlement requirements. This test method shall determine the effects of surface preparation or condition such as bar coatings on the bond strength of deformed steel reinforcing bars to concrete.
This material provides general information only and is not intended as a substitute for competent professional examination and verification as to suitability and applicability.
Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard A677 Version s: A retest shall be provided if the average zinc coating mass fails to meet the requirements.
Work Item s – proposed revisions of this standard.
ASTM A 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.
LME grade, special high grade, high grade, intermediate grade, and prime western grade. Any combination of these products can be xstm into a single fabrication and then hot-dip galvanized. The specification also calls out specific recommended before galvanizing bending radii. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
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.
Are you still looking for the right answer? Historical Version s – view previous versions of standard. This abstract is a brief summary a7667 the referenced standard. The material provided herein has been developed to provide accurate and authoritative information about after-fabrication hot-dip galvanized steel.
Types of embrittlement commonly encountered with galvanized steel are related to aging phenomena, cold working, and absorption of hydrogen. 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.
ASTM A – Galvanizing Steel Bars | American Galvanizer’s Association
KnowledgeBase What is EN ? Heat analysis shall be used to determine the percentage of carbon, manganese, phosphorus, sulfur, vanadium, nickel, chromium, molybdenum, asrm, and copper for the required chemical composition. See Specifying Duplex Systems for more information.
Unique to this specification is also the requirement the galvanized bars be immersed in a heated, sodium dichromate solution immediately after the process. The requirements for finish, appearance, and adherence are identical to those in the other main standards.
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. This specification covers zinc metal made from ore or other material by a process of distillation or by electrolysis in five grades as follows: 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.
Finally, there are requirements for passivating the material chromating to prevent reaction between concrete and the zinc coating, and on bend diameters. Leave this field blank. Was this answer helpful? 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.
It may also be known by its trade name, e.
ASTM A767 – Galvanizing Steel Bars for Concrete Reinforcement – Rebar
Within the text, the SI units are shown in brackets. The mass of ast, coating shall conform to specified requirements.
Stripping method, weighing before and after galvanizing, and microscopy method shall be used to referee z767 results obtained by magnetic thickness measurements. The adherence requirement is the same as A, for strong bond throughout the life of the hot-dip galvanized steel. Rebar is commonly bent prior to galvanizing, and the recommendations for diameter and best practices are provided in A Steel materials and nuts shall be manufactured, processed, and formed as s767 for their respective grades.
The following can cause warpage and distortion: Standard Specification for Zinc. 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 products.
ASTM Specifications | American Galvanizer’s Association
The following is a summary of the various pertinent hot-dip galvanizing specifications. Galvanization shall be used to prepare reinforcing bars. This test method deals with the standard procedures for establishing the relative bond strength of sstm reinforcing bars in concrete using beam-end specimens. 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.
Specification for Structural Steel.