ASTM F1941 PDF

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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This abstract is a brief summary of the referenced standard.

ASTM / ASME spec F for Zinc Plating Which finish to choose?

Slight discoloration that results from 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. This standard does not purport to address all of the safety concerns, if any, associated with its use.

ASTM does not give any asrm express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. Link to Active This link will always route to the current Active version of the standard.

ASTM / ASME spec F1941 for Zinc Plating … Which finish to choose?

Work Item s – proposed revisions of this standard. December 9, Atsm. 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. It’s not possible to diagnose a finishing problem or the hazards of an operation via these pages.

Which finish to choose?

ASTM F1941

I am getting really confused in the finishing section. It is my understanding that the darker colors are a naturally occurring process due to the hexavalent chromium and provide greater corrosion resistance. Combining values from the two systems may result in non-conformance to the standard. 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.

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Isn’t the color achieved by adding a dye and the corrosive resistance achieved through a sealer or thicker chromate?

It specifies coating thickness, supplementary hexavalent chromate or non-hexavalent conversion finishes, 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.

One of these should meet your needs. 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.

My company uses fasteners in the most simple sense–like ast kind of fasteners you buy in the bulk bin at the local hardware store. 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 follow up question would be, if the fasteners are coated with trivalent chromite adding the designation “T”why do the salt spray hours in the ASTM spec differ between any color chromate designation?

For example, rather than specifying: This specification covers application, performance and dimensional requirements for electrodeposited coatings on threaded fasteners with metric screw threads. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Historical Version s – view previous versions of standard. Thank you for your assistance. Work Item s – proposed revisions of this standard.

Combining values from the two systems d1941 result in non-conformance with the standard.

This standard does not purport to address all of the safety concerns, if any, associated with its use. The coating material, coating thickness, chromate finish, and trivalent chromite finish shall be selected and designated.

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Nonmagnetic Coatings on Magnetic Basis Metals. My research is leading me to believe that ASTM F M both inch and metric are the two standards I need; but even those have over grades listed! We do not specify specific plating specs; we simply use the general name.

The electrodeposited coating shall cover all surfaces and shall meet the following requirements: Corrosion resistance and embrittlement of coatings shall be determined by performing mechanical tests. Link to Active This link will always route to the current Active version of the standard.

Toby — Thanks for boiling it down for me. 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. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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. It also highlights the differences between barrel and rack plating and makes recommendations as to the applicability of each process.

The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. The values stated in each system may not be exact equivalents; therefore each system shall be used independently of the other.

Active view current version of standard.