ASTM A/A M. Standard Practice for Providing High-Quality Zinc Coatings (Hot-Dip) provides details on steel selection and other design practices such as. Designation: A – 03 Standard Practice for Providing High-Quality Zinc ASTM Standards: These elements manifest their structural effect as an A. ASTM Apdf – Download as PDF File .pdf), Text File .txt) or read online.

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Failure to follow this practice will result in areas that will not galvanize properly, or that may retain entrapped flux or excessive amounts of zinc. While tapping or retapping after galvanizing results in uncoated female threads, the zinc coating on the engaged male thread will retard corrosion of both components.

Historical Version s – view previous versions of standard. 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.

ASTM Specifications

LME grade, special high grade, high grade, intermediate grade, and prime western grade. 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. This is much superior to putting a hole with the circumference of the hole NOTE 1—Crop corners of gussets on fabricated columns. Thank you for interesting in our services.

The requirements for finish, appearance, and adherence are identical to those in the other main standards. Certain elements asgm in steels are known atm have an influence on the coating structure. However, the AGA does provide a compilation of specifications pertinent to galvanizing. Inch-pound units and SI units are not necessarily exact atm.


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. Eddy-current-type thickness measurement is a non-destructive test satm variations in the impedance of an eddy-current inducing coil asstm by coating thickness variations.

Welding flux residues shall be removed by standard galvanizing cleaning techniques and are best removed at the gun. Please help us to share our service with your friends. Permission rights to photocopy the standard may also be secured from the ASTM website www. This standard has been approved for use by agencies of the Department of Defense.

Purchase a copy from the AGA, or contact your local galvanizer.

Standard Specification for Zinc. When embedding steel wstm in concrete, the highest quality system is produced when all of the steel parts are coated with the same corrosion protection system.

Cosmetically this accelerated growth is seen as a gray matte finished coating as opposed to the usual bright and smooth appearance of galvanized coatings. 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 specification requirements for coating thickness only contain minimums, there is no maximum coating thickness limitation in the specification. 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.

This hole shall be located as close as possible to the weld bead joining the two steel pieces and the edge of the hole shall be not more than 0. Whenever different analyses of steel or different surfaces of steel are united in an assembly the galvanized finish is not generally uniform in appearance. There is also evidence that these coatings are subject to a premature red staining in atmospheric exposure; however, this staining has been found not to be associated with corrosion of the substrate steel.


The venting shall open wherever possible. Inspector Listing – Non-U. Within the text of this specification and where appropriate, SI units are shown in brackets. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.

Gusset plates shall not be spaced closer than 36 in. All oil or grease should be removed from both the sheet steel and wire or rod before rolling. When an assembly of steel parts or an individual steel part has been designed and fabricated with critical dimensions and must be subsequently hot-dip galvanized, the designer should be aware that the hot-dip galvanizing process chemical cleaning to prepare the surfaces for coating and this may alter the critical dimensions.

ASTM A – 01 Standard Practice for Providing High-Quality Zinc Coatings (Hot-Dip)

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. In addition the hot-dip galvanized coating can awtm the base steel material thickness from 2.

Heat analysis shall aa385 used to determine the percentage of carbon, manganese, phosphorus, sulfur, vanadium, nickel, chromium, molybdenum, columbium, and copper for the required chemical composition.