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Furnaces according to AMS 2750

Why are furnaces designed according to AMS 2750 and what use is that to me as a user?

Manufacturers of products are not only interested in low-cost production, but above all in a consistently high quality of their products. This includes, of course, and in particular, reproducible heat treatment at a high level and this is primarily dependent on whether the products are always heated up at the same rate and always brought to the same final temperature. In order to achieve this, the furnace used must have comparable temperatures at all positions in its working chamber and this is precisely specified in DIN 17052-1, CQI-9 and AMS 2750.

AMS 2750

AMS 2750 is not a German standard, but a standard created by SAE Aerospace for the aerospace industry and its suppliers. This standard not only specifies the quality of the furnace – similar to DIN 17052 – in terms of uniformity, but also the regular verification of this through so-called SAT and TUS measurements. These specify in different furnace classes how precise the temperature uniformity in the non-loaded working chamber must be during the steady state and how this must be determined, as well as the exact structure and accuracy of the measuring chain and the regular repetition of the measurements.

This means that the empty furnace is heated up to its working temperature and then the uniformity is measured and documented at several points in the furnace (depending on the size of the furnace).

The AMS 2750 specifies the position and quality of the sensors or the entire measuring chain, as well as a specification of the maximum deviation.

Example: A furnace of furnace class 3 must achieve a uniformity of +-8K; a furnace of furnace class 1 +-3K.

Since Airtec furnaces achieve a uniformity of +-5K as standard, you are always safe with our products in the area of furnace class 2. If you need a Class 1 oven, we will be happy to design your oven accordingly so that you can meet any audit.

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