Furnaces, Kilns, Ovens, Lehrs
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Heat Treat Furnaces / Aging Ovens meeting AMS 2750E and NADCAP specifications

  • Metal Heat treat furnace with aging oven
  • Bench Top Heat Treat Furnaces (Assaying, Hardening, Tempering)
  • Fuel gas fired Bottom Drop Furnace with heated quench tank
  • Fuel Gas fired Bottom drop furnace with quench tank
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Heat treating is a thermal process used to alter the physical properties of metals. By changing the rate of heating and cooling, the mechanical behavior of metals is easily manipulated. The different processes include solution heat treating, precipitation / age hardening, annealing, aging, quenching, assayingtempering and hardening. Interesting: Aluminum alloys are soft after quenching, ferrous materials become briddle. Both groups require another heat treat process after quenching.

View the Bench Top Assaying, Hardening or Tempering Heat Treat Furnaces Specification Sheets with a full description of features and options and then either call to talk to a Keith company specialist or email to request prices, additional furnace specifications and delivery.

Keith furnaces are built to NFPA 86 specifications and meet pyrometric requirements such as NADCAP, AMS 2750 E (Aerospace Material Specifications) and MIL Spec specifications. The different specifications outline in detail the different requirements for thermal processing systems of each alloy. Selecting the furnace class for temperature uniformity and instrumentation type, which guides the design of the system, these specifications also regulate inspection cycles and inspection precision. The class of heat treatment furnace (1-6), type of instrumentation (A - E), quench delay time (5-15 sec) and quench medium temperatue for solution heat treatment are based each alloys process heat treat specification (examples: AMS 2770, AMS 2771, AMS 2772, BAC-5621, RPS-953, MIL-H-6088). These specs are verified by temperature uniformity surveys (TUS) & NADCAP  AC 1702 audits. 

The pyrometric specifications contained in AMS 2750 E regarding instrumentation and furnace class can be summarized as follows:

Instrumentation Type Furnace
Class
Temperature Uniformity
  A B C D E C F
One thermocouple connected to the controller for each control zone X X X X X 1 +/- 3 +/- 5
Record of the temperature measured by the control thermocouple X X X X   2 +/- 6 +/- 10
Sensors for recording X   X     3 +/- 8 +/- 15
One charge thermocouple with record for each control zone X X       4 +/- 10 +/- 20
One over-temperature protection device for each control zone X X X X   5 +/- 14 +/- 25
            6 +/- 24 +/- 50

Our standard metal heat treat furnace systems are built to accommodate process surveys thermocouples according to many pyrometric requirements for thermal processing equipment used for metal heat treatment. Our engineering department is very familiar with many types of specifications.

Metal Heat Treating Furnaces for ferrous materials:

Contact Keith Company to order a Metal Heat Treat Furnace for your application, or to learn more about any of our products.