Zinc Coating Thickness Requirements: ASTM A vs. F Dimension. ASTM A ASTM F Avg. Coating. Thickness of. Specimens. Tested. ASTM F covers the requirements for hot-dip zinc coating applied to carbon steel and alloy steel bolts, screws, washers, nuts, and special. ASTM A does not cover threaded bolts and fasteners. ASTM A and F are the ASTM specifications that cover the requirements for.

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The amount of additional documentation beyond ASTM A requirements will vary depending on a number of f23229 requirements the customer can specify under F There are three columns listing the number of test articles for three different inspection tests required under F This material provides general information only and is not intended as a substitute for competent professional examination and verification as to suitability and applicability.

Hot-Dip Galvanizing Specifications – Portland Bolt

Therefore, it must be clarified whether the plant has the asrm to lubricate hardware after hot-dip galvanizing. ASTM A This specification covers the requirements for hot-dip galvanizing on iron and steel products made from rolled pressed and forged shapes, castings, plates, bars, and strips.

Also in which material we are coating or galavanizing. For long pieces anchor rods or r2329 greater than five feet in lengthcoating thickness measurements must be taken on each end and in the middle of the article.

The f23229 differences between the two specifications, described below, include topics related to sampling protocol, coating thickness, inspection, embrittlement, and documentation.

Galvanizing fasteners in accordance with A, will usually meet or exceed the requirements of F, because F defers to A in many sections. In no case shall the average reading of a single specimen be below the average thickness shown in the Average Thickness on Individual Specimen column.


Phil- The hot dip galvanizing process is f23229 or less the same within all of those standards, the difference is how they are handled. This abstract is a brief summary of the referenced standard. For high strength fasteners having a speci?

ASTM F – Portland Bolt

B For test method, see For example, a lot xstm of articles under the detection process requires testing of 11 samples for coating thickness, 11 samples for visual appearance, and 3 samples for adhesion. The test methods for appearance and smoothness under F asrm be conducted for every batch lot by visual inspection in accordance with methods provided in A Also, A and F have different sampling requirements; F requires more samples per lot than A This t2329 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.

Any insights would be deeply appreciated. Galvanized washers shall not be bonded to each other see Note 2. If your requirement is for hot dip galvanizing, electroplating would not be sufficient. Materials and Manufacture 5.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Suitable acceptance criteria shall be agreed between the purchaser and the galvanizer before placing the order.

It is f2239 for the galvanizer to communicate the bath temperature to the customer to ensure the end user understands the effects the galvanizing temperature will have on the steel.

According to Note C of Table 1, It is only required to conduct testing on samples for astn thickness once every five batch lots. Each bolt specification may list additional methods to prevent hydrogen embrittlement as well as place additional requirements on embrittlement testing which should be researched separately. Many thanks Sal from Dubai.


Leave this field empty. According to F Paragraph 5. Sal- Are you asking which galvanizing standard you should be using? Will galvanizing bolts, that will be used for Sub-Sea hydratightightening using AquaMax jacks permissible, or would the stretching of the bolt under tension remove the galvanized warranty.

Afif — The difference between hot dip galvanizing structural articles and fasteners is the spinning. Coating Thickness Table 2 of F lists average coating thickness requirements for production lots, batch lots, and individual specimens. This specification is intended to be applied to hardware items that are centrifuged or otherwise handled to remove excess zinc.

ASTM F2329 vs. ASTM A153

Vinay- ASTM A and A both say that the maximum service temperature for galvanized bolts should not exceed F unless caution is used in regard to the potential for liquid hydrogen embirittlement.

This method is similar to an inspection of coating thickness on multi-specimen articles galvanized per ATSM A The average of those selected measurements is the average coating thickness.

It is important to note the acceptance criterion in all cases is zero defects. April 10, Authored by Alana Hochstein. The zinc used for the coating shall conform to the chemical composition required. Thus, the thickness determined is a point value. Threaded fasteners are handled differently in order to remove the excess zinc from the threads and would fall under A or F In addition, the purchaser shall provide fasteners having sufficient dimensional allowance to accommodate the zinc thickness deposition, as required in 8.