ASTM F2329 PDF

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ASTM A Authored by Alana Fossa. Galvanizing fasteners in accordance with A, will usually meet or exceed the requirements of F, because F defers to A in many sections. However, there are some differences between the specifications the galvanizer and customer should be aware of to determine whether it is practical for a particular galvanizing plant to meet the customers specific requirements under the latest F revision The major differences between the two specifications, described below, include topics related to sampling protocol, coating thickness, inspection, embrittlement, and documentation.

ASTM F describes two different sampling plans for batch lots and production lots. The differences in the types of lots entail different sampling plans, which specify the number of test articles for performing various test methods during inspection of the finished product.

It is important to ensure the customer specifies which type of lot is required. F defines the two different lots and their associated sampling plans as follows:. A batch lot is defined as a quantity of identical parts cleaned, pickled, fluxed, and galvanized together at one time in a galvanizing basket.

F Table 1 provides the sampling plan for batch lots. The batch lot inspection process is more similar to inspection under A than inspection of production lots, but Table 1 of F has some additional requirements to consider. See excerpt of Table 1 below. Compared to the sampling plan in A, F requires fewer samples per batch lot size, but the galvanizer is required to also conduct adhesion testing and visual inspection for appearance on these test articles as defined by Table 1.

It is important to note the acceptance criterion in all cases is zero defects. Production lots are defined as batches of parts originating from the same manufacturing lot, processed continuously through cleaning, pickling, fluxing, dipping in molten zinc and spun in a centrifuge, or other means, without any significant change in time, temperature, and concentration of the constituents of the process.

There are two types of production lots one for a detection process and the other for a prevention process. For each of these types, there are also inspection criteria for coating thickness, visual appearance, and adhesion. The acceptance number in all cases is zero defects.

If certified test reports are not available, then the supplier must default to Sample Size C and conduct the tests required. For example, a lot size of articles under the detection process requires testing of 11 samples for coating thickness, 11 samples for visual appearance, and 3 samples for adhesion.

According to Note C of Table 1, It is only required to conduct testing on samples for coating thickness once every five batch lots. For long pieces anchor rods or articles greater than five feet in length , coating thickness measurements must be taken on each end and in the middle of the article.

This method is similar to an inspection of coating thickness on multi-specimen articles galvanized per ATSM A The test methods for appearance and smoothness under F shall be conducted for every batch lot by visual inspection in accordance with methods provided in A Table 2 of F lists average coating thickness requirements for production lots, batch lots, and individual specimens. The coating thickness requirements of A Table 1 meet or exceed those of F Table 2 except for:.

On the other hand, if embrittlement testing is necessary under F, it is to be conducted per ASTM F a wedge positioned and tensioned under a bolt head , which is a different method than any of the methods described within A Paragraph 9. 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.

These instances can include when steel has been severely work hardened or when the galvanizing bath temperature exceeds the stress relief or tempering temperatures of the fasteners. Fasteners which are subjected to severe work hardening must be stress-relieved prior to galvanizing. Paragraph 7. It is necessary 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.

If the customer specifies, the galvanizer will be required to provide the average galvanizing temperature the fasteners will be exposed to. Best practice is to note the bath temperature when galvanizing steel to F, although only the average bath temperature is required.

According to F Paragraph 5. Additionally, Paragraph 5. Because A does not require water quenching nor chemical post-treatments, communication between the customer and the galvanizer is required to determine whether the galvanizer has a quench tank and the capability to perform chemical post-treatments, or if air-cooling will be acceptable.

Therefore, it must be clarified whether the plant has the ability to lubricate hardware after hot-dip galvanizing. Otherwise, a third party will be required to apply the lubricant at an additional cost. The amount of additional documentation beyond ASTM A requirements will vary depending on a number of optional requirements the customer can specify under F However, if a purchaser also requires the galvanizer to inspect dimensional requirements of parts upon delivery, they must provide the galvanizer with the necessary tools and inspection gauges.

The material provided herein has been developed to provide accurate and authoritative information about after-fabrication hot-dip galvanized steel. This material provides general information only and is not intended as a substitute for competent professional examination and verification as to suitability and applicability. The information provided herein is not intended as a representation or warranty on the part of the AGA. Anyone making use of this information assumes all liability arising from such use.

Was this answer helpful? Are you still looking for the right answer? Ask an Expert. July 16, Post Comment. Login Close. April 10, Authored by Alana Fossa. April 10, Authored by Bernardo A. Duran III.

F defines the two different lots and their associated sampling plans as follows: Batch Lots A batch lot is defined as a quantity of identical parts cleaned, pickled, fluxed, and galvanized together at one time in a galvanizing basket.

Production Lots Production lots are defined as batches of parts originating from the same manufacturing lot, processed continuously through cleaning, pickling, fluxing, dipping in molten zinc and spun in a centrifuge, or other means, without any significant change in time, temperature, and concentration of the constituents of the process.

Coating Thickness Table 2 of F lists average coating thickness requirements for production lots, batch lots, and individual specimens. Quenching According to F Paragraph 5. Leave this field blank.

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ASTM F2329

ASTM A does not cover threaded bolts and fasteners. 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. It does not cover threaded fasteners that are centrifuged or otherwise handled to remove excess zinc. This ASTM specification covers zinc coatings applied by the hot-dip process on iron and steel hardware. This specification is intended to be applied to hardware items that are centrifuged or otherwise handled to remove excess zinc. Since threaded fasteners are spun at high speeds in a centrifuge to remove excess zinc from the threads, they would fall under the A class C specification. The standard specification that 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.

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ASTM F2329 Fasteners

Historical Version s - view previous versions of standard. Work Item s - proposed revisions of this standard. More F This specification 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. The zinc used for the coating shall conform to the chemical composition required. The following tests shall be made to ensure that the zinc coating is being furnished in accordance with this specification: coating thickness; finish and appearance; embrittlement test; and adhesion test. This abstract is a brief summary of the referenced standard.

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ASTM F2329 vs. ASTM A153

ASTM A Authored by Alana Fossa. Galvanizing fasteners in accordance with A, will usually meet or exceed the requirements of F, because F defers to A in many sections. However, there are some differences between the specifications the galvanizer and customer should be aware of to determine whether it is practical for a particular galvanizing plant to meet the customers specific requirements under the latest F revision The major differences between the two specifications, described below, include topics related to sampling protocol, coating thickness, inspection, embrittlement, and documentation. ASTM F describes two different sampling plans for batch lots and production lots.

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