23 Feb The ASTM F specification covers several common electrodeposited coatings on threaded fasteners. The below chart details the various. The fastener industry should be made aware of an important recent development in the realm of. ASTM fastener standard specifications. ASTM F/. ASTM F/FM: Standard Specification for Electrodeposited Coatings on Mechanical Fasteners, Inch and Metric.
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One of these should meet your needs. Changing the last letter to a B means that the chromate is blue-bright transparent with a bluish tinge and slight Iridescence or C means that it is yellow yellow iridescent. My company uses fasteners in the most simple sense–like the kind of fasteners you buy in the bulk bin at the local hardware store.
It is my understanding that the darker colors are a naturally occurring process due to the hexavalent chromium and provide greater corrosion resistance. The values stated in each system may not be exact equivalents; therefore each system shall be used independently of the other.
Slight discoloration that results wstm baking, drying, or electrode contact during rack-plating, or all of these, as well as slight staining that results from rinsing shall not be cause for rejection. Work Item s – proposed revisions of this standard. My research is leading me to believe that ASTM F M both inch and metric astn the two standards I need; but even those have over grades listed!
Which finish to choose?
Nonmagnetic Coatings on Magnetic Basis Metals. We do not specify specific plating v1941 we simply use the general name. The coating material, coating thickness, chromate finish, and trivalent chromite finish shall be selected and designated.
The electrodeposited coating shall cover satm surfaces and shall meet the following requirements: For example, rather than specifying: This abstract is a brief summary of the referenced standard. Combining values from the two systems may result asym non-conformance to the standard. Active view current version of standard. December 9, Q. 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.
All I want is a single spec to call out, to get the basic zinc-electroplated fastener. 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 – Portland Bolt
Isn’t the color achieved by adding a dye and the corrosive resistance achieved through a sealer or thicker chromate? That’s exactly what I needed.
It specifies coating thickness, supplementary hexavalent chromate or trivalent chromite finishes, corrosion resistance, precautions for managing the risk of hydrogen embrittlement and hydrogen embrittlement relief for high-strength and surface-hardened fasteners.
Nonmagnetic Coatings on Magnetic Basis Metals.
This specification covers application, performance and dimensional astk for electrodeposited coatings on threaded fasteners with metric screw threads. All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer.
Link to Active This link will always route to the current Active version of the standard. Link to Active F19411 link will always route to the current Active version of the standard. Corrosion resistance and embrittlement of coatings shall be determined by performing mechanical tests.
I am getting really confused in the finishing section. It specifies coating thickness, supplementary hexavalent chromate or non-hexavalent conversion coatings, corrosion resistance, precautions for managing the risk of hydrogen embrittlement and hydrogen embrittlement relief for high-strength and surface-hardened fasteners.
The chromate finish letter E designates a black color.
ASTM / ASME spec F1941 for Zinc Plating … Which finish to choose?
It’s not possible to diagnose a finishing problem or the hazards of an operation via these pages. Historical Version s – view previous versions of standard.
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. This standard does not purport to address all of the safety concerns, if any, associated with its use.
ASTM / ASME spec F for Zinc Plating Which finish to choose?
It also highlights the differences between barrel and rack plating and makes recommendations as to the applicability of each process. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Is there an acceptable way to demonstrate equivalence? 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.