Standard

SAE AMS2454A

Published

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Abstract

Purpose This specification covers the requirements for electroless nickel-phosphorus plate that is co-deposited with polytetrafluoroethylene (PTFE) over other materials. Application This deposit has been used typically to provide a uniform build-up on intricate shapes for improvement of wear resistance, low reflectivity, and/or as an electrically conductive finish with improved corrosion resistance, but usage is not limited to such applications. The deposit is generally dark and nonreflective. The deposit has been used in service up to 500 °F (260 °C), although wear and/or corrosion resistance may degrade as service temperature increases. Corrosion resistance is a function of substrate material and the type and thickness of underplate and the electroless nickel PTFE composite surface layer. See 8.15. This plating is not specifically intended for applications requiring premium solderability or adhesive bondability. See 8.14. Application of electroless nickel PTFE composite plating to steel parts having a hardness of 46 HRC (ultimate tensile strength of 220 ksi [1517 MPa] or higher) shall not be performed unless authorized by the design documentation or specific approval has been received from the cognizant engineering organization. Classification The cognizant engineering organization may assign one or more of the following classifications to specify plating requirements: Class Designates Thermal Treatment (see 3.3.2, 3.4.4, 8.5, and 8.11) Class 1: Except for hydrogen embrittlement relief, no post plating thermal treatment. Class 2: Thermal treatment at 450 °F (232 °C) to harden the deposit. Class 3: Thermal treatment at 375 °F (191 °C). Class 4: Thermal treatment at 250 °F (121 °C). Unless a specific class is specified, Class 1 or Class 4 may be supplied. Safety - Hazardous Materials While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved.

Document information

  • Standard from SAE_AC
  • Published:
  • Version: 0
  • Document type: IS