NORMA ASTM A123 PDF

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ASTM A123-17: Standard Specification for Zinc (Hot-Dip Galvanized) Coatings

A fabrication can have more than one material category such as a frame assembly. It is the responsibility of the designer and fabricator to ensure the product has been properly designed and built before hot-dip galvanizing. The galvanizer should be informed of any necessary special instructions or requests, preferably in writing on the purchase order, before the materials are shipped to the galvanizing plant. It is the responsibility of the galvanizer to ensure compliance with the specifications, as long as the product has been designed and fabricated in accordance with the supporting specifications. 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, it should be approved by the customer. Once the material has been hot-dip galvanized, it can be fully inspected at the galvanizing plant prior to shipment. Any materials rejected by an inspector for any reason except embrittlement may be stripped, regalvanized, and resubmitted for inspection.

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ASTM A123 - A153

Steel and iron often earn their rust-resistance through galvanization, which involves coating the material in zinc. However, regardless of its relatively basic procedure and resulting superior corrosion protection, due to the metallurgical reaction between the iron and molten zinc to form a tightly bonded alloy coating, hot-dip galvanizing benefits from the harmonized guidelines laid out in ASTM A It also covers steel forgings and iron castings too large to be centrifuged, but it does not, however, apply to wire, pipe, tube, or steel sheet that is galvanized on specialized or continuous lines. It is also not to be used for steel less than 22 gage thick. In addition, it addresses sampling and test methods to assure that the zinc coating is being furnished properly. Your email address will not be published. This site uses Akismet to reduce spam.

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ASTM Specifications

Standard designations usually consist of a letter prefix and a sequentially assigned number. This may optionally be followed by a dash and the last two digits of the year in which the standard was adopted. Prefix letters correspond to the following subjects:. This list may include either current or withdrawn standards. A withdrawn standard has been discontinued by its sponsoring committee.

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ASTM A123 for Structural Steel Products

This specification covers the standard requirements for hot-dip galvanized zinc coatings on iron and steel products made from rolled pressed and forged shapes, castings, plates, bars, and strips. This specification deals with both unfabricated products and fabricated products, for example, assembled steel products, structural steel fabrications, large tubes already bent or welded before galvanizing, and wire work fabricated from uncoated steel wire. Also covered here are steel forgings and iron castings incorporated into pieces fabricated before galvanizing or those too large to be centrifuged or otherwise handled to remove excess galvanizing bath metal. This specification also covers steel forgings and iron castings incorporated into pieces fabricated before galvanizing or which are too large to be centrifuged or otherwise handled to remove excess galvanizing bath metal.

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