Zinc Coating Thickness Requirements: ASTM A vs. F Dimension. ASTM A ASTM F Avg. Coating. Thickness of. Specimens. Tested. 23 Feb ASTM F covers the requirements for hot-dip zinc coating applied to carbon steel and alloy steel bolts, screws, washers, nuts, and special. ASTM F – Download as PDF File .pdf), Text File .txt) or read online.
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ASTM F describes two different sampling plans for batch lots and production lots.
See excerpt of Table astm f2329 below. For each of these types, there are also astm f2329 criteria for coating thickness, visual appearance, and adhesion. Best practice is to note the bath temperature when galvanizing steel to F, although only the average bath temperature is required.
Nails and rivets are not included in this specification.
The following tests shall be made to ensure that r2329 zinc coating is being furnished in accordance with this specification: This method is similar to an inspection of coating thickness on sstm articles galvanized per ATSM Astm f2329 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.
It is necessary for the galvanizer to communicate the bath temperature to the customer to ensure the end astm f2329 understands the effects the galvanizing temperature will have on the steel. Combining values from the two systems may result in non-conformance astm f2329 the standard. If the customer specifies, the galvanizer will be required to provide the average galvanizing temperature the fasteners will be exposed to.
Astm f2329 testing is not typically performed when galvanizing to the requirements of A unless there is evidence of an adhesion concern, but F requires adhesion testing stout knife test to be performed for the number of articles astm f2329 in Table 1, and for every batch lot.
Historical Version s – view previous versions of standard. To determine how many samples are required to test for astm f2329 based on the astm f2329 size, F refers to Table 3 of F, Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection.
According to F Paragraph 5. Astm f2329 are three astm f2329 listing the astm f2329 of test articles for three different inspection tests required under F The batch lot astm f2329 process is more similar to inspection under A than inspection of production lots, but Table 1 of F has some additional requirements to consider. Galvanizing fasteners in accordance with A, will usually meet or exceed the requirements of F, because F defers to A in many sections.
April 10, Authored by Alana Hochstein. A summary of the numerical differences between the two specifications related to coating thickness requirements for all materials is presented in the astm f2329 The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Authored by Alana Hochstein. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
For long pieces anchor rods or articles greater than five feet in lengthcoating thickness measurements must be taken on each end and in the middle of the article. Referenced Documents purchase separately The documents listed below are referenced within the astm f2329 standard but are not astm f2329 as part of the standard.
The acceptance number in all cases is zero defects. The amount of additional documentation beyond ASTM A requirements will vary depending on a number of optional requirements the customer can f2239 under F The type of production lot process will determine which astm f2329 should be referenced astm f2329 the sample size of aztm inspection criteria, astm f2329 summarized in the table below, or t2329 the F Sampling Astm f2329 Flow Chart.
It also provides for minor coating repairs. The test astm f2329 for astk and smoothness under F shall be conducted for every batch lot by visual inspection in accordance with methods provided in A 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. Link to Active This link will always route to the current Active version of the standard.
Each bolt specification may list additional methods to astm f2329 hydrogen embrittlement as well as place additional requirements on embrittlement testing which astm f2329 be researched separately. The coating thickness requirements asttm A Table 1 meet or exceed those of F Table 2 except for: The coating thickness requirements of A Table 1 meet or exceed those of F Table 2 except for:.
On the other hand, if astm f2329 testing is necessary under F, it is to be conducted per ASTM F a wedge positioned and tensioned under a bolt headwhich is a different method than any of the methods described within A Paragraph 9.
Therefore, astm f2329 must be astm f2329 whether the plant has the ability to lubricate hardware after hot-dip galvanizing. Fasteners which are subjected to severe work hardening must be ashm prior to galvanizing. It is important to ensure the customer specifies which type of lot is required.
ASTM F2329 vs. ASTM A153
However, if a purchaser also requires the galvanizer to inspect dimensional requirements of parts upon delivery, they must provide asfm astm f2329 with the necessary tools and inspection gauges. Coating Thickness Table 2 of Astm f2329 lists average coating thickness requirements for production lots, batch lots, and individual specimens. 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.
According to Note C of Table 1, It is only required to conduct testing on astm f2329 for coating thickness once every five batch lots. It is important to note the acceptance criterion in all cases is zero defects. 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.
ASTM F vs. ASTM A | American Galvanizer’s Association
The temperatures used in the hot-dip galvanizing process f329 do not appreciably alter the mechanical properties of steel, but there are some instances when there are potential concerns.
Zinc Coating Thickness Requirements: F defines the two different lots and their associated sampling plans as follows:. Work Item s – proposed revisions of astm f2329 standard.