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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Also, the combination of two different steel types or thicknesses in one item may result in a nonuniform galvanizing finish. Steels with silicon in the range 0. The following is a summary of the various pertinent hot-dip galvanizing specifications. The material categories covered in the specification include structural steel and plate, strips and bars, pipes and tubing, and wires. There are coating thickness minimums, but no maximums, and the threads are not subject to the coating thickness requirement.

Re-machining or otherwise reprocessing of critical dimensions after hot-dip galvanizing may be required. In addition, a layer of the molten zinc adheres to the surface of the compound layers as the satm is withdrawn from the galvanizing bath.

The requirements for finish, appearance, and adherence are identical to those in the other main standards. Current edition approved Nov. Similarly these holes shall allow all solutions and molten zinc to drain freely from the assemblies.

What are the differences between ASTM A123/A123M and ASTM A385?

KnowledgeBase What is EN ? Work Item asrm – proposed revisions of this standard. NOTE 1—Strengthening gussets in channel sections should be cropped for zinc a38.


In the case of columns with end plates see Fig. When embedding steel parts in concrete, the highest quality system is produced when all of the steel parts are coated with the same corrosion protection system. Steel materials and nuts shall be manufactured, processed, and formed as appropriate for their respective grades. The following can cause warpage and distortion: This heating may cause discoloration of the galvanized coating near the heated area.

Using the following formulas, the chart shows typical sizes of holes and clipped corners. Standard Specification for Zinc Coating Hot-Dip on Iron and Hardware applies to hardware products such as castings, fasteners, rolled, pressed, and forged products, and miscellaneous threaded objects that will be centrifuged, spun, or otherwise handled to remove the excess zinc. It may be necessary to post heat these parts in order to have them function freely. The requirements of this specification are very similar to those in A, except for the addition of threaded products and embrittlement requirements.

In box sections see Fig. 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. Internal Gussets—Should be spaced a minimum of 36 in. First, the specification details the coating thickness requirements based on bar size.

This welding operation will reheat the area and may relieve some of the residual stress near the cope edges. This is much superior to putting a hole with the circumference of the hole NOTE 1—Crop corners of gussets on fabricated columns. Where internal venting is not possible, external vents shall be provided with one vent hole in each side of each intersection. To accommodate the thickness of the galvanized coating on the bolt, the clearance hole may need to be reamed to remove excess galvanized coating so that the galvanized bolt will fit in the clearance hole.


The vent opening shall be a half circle with its diameter at the base plate D, Fig.

This specification covers z385 western grade-recycled PWG-R zinc made by recycling zinc secondary materials including but not limited to drosses and skimmings. Grease or oil becomes volatile at the galvanizing temperature and will generate gas which will prevent zinc from sealing the contact edges.

ASTM Apdf – Free Download PDF

Inch-pound units and SI units are not necessarily qstm equivalents. Last previous edition approved in as A — 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.

Not all combinations of silicon, phosphorus, carbon, and manganese can be galvanized successfully.

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. Any combination of these products can be assembled into a single fabrication and then hot-dip galvanized.

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