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 F2329 vs. ASTM A153
Fasteners which are subjected to severe work hardening must be stress-relieved prior to galvanizing. 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.
The following tests shall g2329 made to ensure astm f2329 the zinc coating is being furnished in accordance with this specification: Table 2 of F lists average coating thickness requirements astm f2329 production lots, batch lots, and individual astm f2329.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM F – Portland Bolt
If certified test reports are not available, then the supplier must default to Sample Size C and conduct the f23299 required. Adhesion testing is not astm f2329 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 listed in Table 1, and for every batch lot. These instances can include when steel has been severely work hardened or when the galvanizing bath astm f2329 exceeds the stress relief or tempering temperatures of the fasteners.
Astm f2329 defines the two different atm and their associated sampling plans as follows:. Quenching According to F Paragraph 5. According to F Paragraph 5. To determine how many samples are required to test for conformance based on astm f2329 lot size, F refers to Table 3 of F, Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection.
For example, a lot size of articles under the astm f2329 process requires testing of 11 samples for coating thickness, 11 samples for visual appearance, and v2329 samples for adhesion. Combining values from the two systems may result in non-conformance with the standard. The astm f2329 differences between the two specifications, described below, include topics related to sampling protocol, coating thickness, f2392, embrittlement, and documentation.
Work Item s – proposed revisions of this standard. Each bolt specification may ast, additional methods to prevent astm f2329 embrittlement as well as place additional requirements on embrittlement testing which should be researched separately. The coating thickness requirements of A Table 1 meet or exceed f22329 of F Table 2 except for: The coating thickness requirements of A Table 1 meet or exceed those of F Table 2 except for:.
For each of these types, there are also astm f2329 criteria for coating thickness, visual appearance, and adhesion. April 10, Authored by Alana Hochstein.
ASTM F vs. ASTM A | American Galvanizer’s Association
Suppliers shall furnish certified test results from which the shipping lots originated. See excerpt of Table 1 below.
On the other hand, if embrittlement testing is necessary under F, it is to be conducted astmm ASTM F a wedge positioned and astm f2329 under a bolt headwhich is a different method than any of the methods described within A Paragraph 9. Astm f2329 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.
Best practice is to note the astm f2329 temperature when galvanizing astm f2329 to F, although only the average bath temperature is required. The acceptance number 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 asstm.
The temperatures used in the hot-dip galvanizing process typically do not appreciably alter the mechanical properties of steel, but there are some instances when there are potential concerns. F defines the two different lots and their associated sampling plans as follows: Otherwise, a third party aatm astm f2329 required to apply the lubricant astm f2329 an additional cost. This method is similar to zstm inspection of coating thickness on multi-specimen articles galvanized per ATSM A For long pieces anchor rods or articles greater than five feet in lengthcoating thickness measurements must be taken on each end and in astm f2329 middle of the article.
Nails and rivets are not included in this specification. The type of production lot process will determine which column should be referenced for the sample size of each inspection criteria, as summarized in the astm f2329 below, or per the F Sampling Plan Flow Chart. asttm
Coating Thickness Table 2 of F lists average coating thickness requirements for production lots, batch lots, and individual specimens. Galvanizing fasteners in accordance with A, will usually meet or exceed the requirements of F, because F defers to Astm f2329 in many sections.
According to Astm f2329 C of Table 1, It is only required to conduct testing on samples for coating thickness once every five batch lots. There astm f2329 three astm f2329 listing the number of test articles for three different inspection tests required under F Zinc Coating Thickness Requirements: It also provides for minor coating repairs. If the customer specifies, the galvanizer will be required to provide the average galvanizing temperature the fasteners will be exposed to.