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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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.
The material provided herein has been developed to provide accurate and sstm information about after-fabrication hot-dip galvanized steel. However, the A76 does provide a compilation of specifications pertinent to galvanizing.
This specification covers steel reinforcing bars with protective zinc coatings applied by dipping the properly prepared reinforcing bars into a molten bath of zinc. This x767 provides asrm information only and is not intended as a substitute for competent professional examination and verification as to suitability and applicability. Finally, there are requirements for passivating the material chromating to prevent reaction between concrete and the zinc coating, and on bend diameters.
Steel materials and nuts shall be manufactured, processed, and formed as appropriate for their respective grades. Common distorted and warped members of assemblies are sheets or plates assembled by welding or riveting. Practice for Repair a7767 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.
This specification covers rolled steel structural shapes for use in building framing or bridges, or for general structural purposes.
If rebar is bent fabricated after the galvanized coating is applied and any flaking or cracking zstm, it is not rejectable. 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. 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.
The galvanized coating shall be chromate treated. Any combination of these products can be assembled into a single fabrication and then hot-dip galvanized. This specification covers zinc metal made from ore or other material by a process of distillation or by electrolysis in five grades as follows: A retest shall be provided if the average zinc coating mass fails to meet the requirements.
Are you still looking for the right answer? Therefore, each system shall be used independently of the other.
The specification outlines three acceptable forms of touch-up: Specification for Structural Steel. Types of embrittlement commonly encountered with galvanized steel are related to aging phenomena, cold working, and absorption of hydrogen. Stripping method, weighing before and after galvanizing, and microscopy method shall be used to referee the results obtained by magnetic thickness measurements.
Aztm this answer helpful? The specification also calls out specific recommended before galvanizing bending radii. The values stated in each system may not be exact equivalents.
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. 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.
ASTM Specifications | American Galvanizer’s Association
The requirements for finish, appearance, and adherence are identical to those in the other main standards. 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. 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.
The purpose of the calculation is to provide justification for the purchase of a higher initial cost system qstm a low life-cycle cost over an initially less expensive coating which has high future costs. Inspector Listing – Non-U. This specification covers black and hot-dipped galvanized hot-formed welded and seamless carbon steel square, a76, rectangular, or special shape structural tubing for welded, riveted, or bolted construction or bridges and buildings, and for general structural purposes.
Anyone making use of this information assumes all liability arising from such use. Leave this field blank. Link to Active This link will always route to the current Active version of the standard.
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 following can cause warpage and distortion: Within the text, the SI units are shown in brackets.
ASTM A767 – Galvanizing Steel Bars for Concrete Reinforcement – Rebar
Finally, the adherence requirement is for the entire coating to have a strong adherence throughout the service life of the galvanized steel. Embrittlement is the loss or partial loss of ductility in a steel where an embrittled product characteristically fails by fracture without appreciable deformation. 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, wstm shapes, and other hot-dip galvanized products, including uncoated areas remaining after initial hot-dip galvanizing.
These notes and footnotes excluding those in tables ashm not be considered as requirements of the specification.