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AMS 2750E - This specification covers pyrometric requirements for thermal processing equipment used for heat treatment. It covers temperature sensors, instrumentation, thermal processing equipment, system accuracy tests, and temperature uniformity surveys. These are necessary to ensure that parts or raw materials are heat treated in accordance with the applicable specification(s).

AMS2750E was revised in July 2012 and included the following changes:
  • Replaced AMS2750D from September 2005
  • Includes wireless sensor technology
  • Added requirements to document "As found" instrument calibration and offset conditions (procedural impacts)
  • Calibration changes like check min. of 6 simulated sensor @ min. 4 points, calibrated for each type input/output used
  • Provides more details on Temperature Uniformity Survey Testing (TUS) procedures, furnace repairs and modifications, data collection requirements, survey frequency, number and location of sensors, Pass/Fail requirements
  • Added Refrigeration & Quench Furnace class to tables
For more detailed information on AMS2750E we refer you to the Industrial Heating article.

AS7102 Nadcap Requirement for Heat Treating
  • Documents the requirements for the accreditation program
  • Industry managed program for continuous improvement
    • Standard industry audit program for special processes
    • Focuses on overall supplier performance
    • Auditing overseen by PRI (Performance Review Institute)
A United States defense standard, often called a military standard, "MIL-STD", "MIL-SPEC", or (informally) "MilSpecs", is used to help achieve standardization objectives by the U.S. Department of Defense.

 

Codes, process and material specifications:
AMS 2750E Covers pyrometric requirements for thermal processing equipment used for heat treatment. It covers temperature sensors, instrumentation, thermal processing equipment, system accuracy tests and temperature uniformity surveys.
BAC 5621 Establishes equipment classifications and instrumentation types for processes requiring controlled temperatures. (similar to AMS 2750E) Boeing process specification title: “temperature control for processing materials”
RPS953 Rolls Royce specifications for “laboratory control procedure for heating furnaces and Associated equipment and the thermal processing of materials”. Equipment shall meet AMS 2750E Class 2 for temperatures <1380degF
NADCAP AS7102 This aerospace standard (AS) establishes the requirements for heat treating accreditation by the National Aerospace and Defense Contractors Accreditation Program (NADCAP)
   
Specifications for materials:
AMS 4439G This specification covers magnesium alloy in the form of castings
AMS 2759E Establishes general requirements for heat treating of steel parts
MS 2759/11 Establishes general requirements for thermal stress relief treatments of steel parts.
  • Carbon and low alloy steels
  • Tool steels
  • Precipitation hardening, corrosion-resistant and maraging steel
  • Austenitic corrosion-resistant steels
  • Martensitic corrosion-resistant steels
AMS 2770J Heat treatment of wrought aluminum alloys parts
AMS 2771E Heat treatment of aluminum alloy castings
AMS 2772F Heat treatment of aluminum alloys raw materials