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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Hot-Dip Galvanizing Specifications – Portland Bolt
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. A covers galvanizing on asrm products including fasteners, while F is specific to threaded fasteners, nuts and washers.
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. ASTM A This specification covers the requirements for hot-dip galvanizing on iron and steel aztm made from rolled pressed and forged shapes, castings, plates, bars, and strips. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
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. G2329 manufacturer shall afford the representative of the purchaser all reasonable facilities to satisfy him that the zinc coating is being furnished in accordance with this speci? ASTM A does not cover threaded bolts and fasteners.
The selection of the sampling plan shall be in accordance with T2329 F Xstm Thickness of Individual Specimen 0.
According to F Paragraph 5. Suppliers shall furnish certified test results from which the shipping lots originated. To determine how many samples are required to test for conformance based on the lot size, F refers to Table 3 of F, Practice for Fastener Sampling sstm Specified Mechanical Properties and Performance Inspection.
Any insights would be deeply appreciated. Contact us if you have a need for hot-dip galvanized fasteners or with any technical questions regarding hot-dip galvanizing. Adhesion 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 listed in Table 1, and for every batch lot.
April 10, Authored by Alana Hochstein. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. This method is similar to an inspection of coating thickness on multi-specimen articles galvanized per ATSM A ASTM F 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.
A number in parentheses indicates the year of last reapproval. Parts may be dull due to the presence of silicon in the steel. Thank you for the useful content. This abstract is a brief summary of the referenced standard. Nails and rivets are not included in this speci? Quenching According to F Paragraph 5. The amount of additional documentation beyond ASTM A requirements will vary depending on a number of optional requirements the customer can specify under F The coating thickness requirements of A Table 1 meet or exceed those of F Table 2 except for: Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
ASTM F2329 vs. ASTM A153
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. Many thanks Sal from Dubai. Unless otherwise agreed to in the purchase order, delivered galvanized washers shall not be bonded to each other. Therefore, the supplier of the fasteners submitting the product to the galvanizer shall be aware of the tempering temperature of the fasteners relative to the temperature of the galvanizing bath and the potential effect it may have on the product.
Also in which material we are coating or galavanizing. C Coating thickness frequency of measurements: For test method, see ASTM A A covers galvanizing on many products including fasteners, while F is specific to threaded fasteners, nuts and washers.
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. The acceptance number in all cases is zero defects. April 10, Authored by Bernardo A. It does not cover threaded fasteners that are centrifuged or otherwise handled to remove excess zinc. Authored by Alana Hochstein.
Therefore, it must be clarified whether the plant has the ability to lubricate hardware after hot-dip galvanizing. If the customer specifies, the galvanizer will be required to provide the average galvanizing temperature the fasteners will be exposed to.
It is intended to be applicable to fasteners that are centrifuged or otherwise handled to remove excess zinc.
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. Link to Active This link will always route to the current Active version of the standard.
We are are not certain what standards xstm commonly used in Dubai, so we cannot speak to those.