Tempering C-ALHT

Description

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TEMPERING C-ALHT is a eutectic potassium/sodium nitrate mixture formulated to meet AMS 2821 Class 2. It can be used for the annealing and solution heat treatment of aluminum alloys and other non-ferrous alloys such as Nitinol. TEMPERING C-ALHT is also suitable for tempering or “drawing” hardened steels.

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TEMPERING C-ALHT is exceptionally fluid in the molten state, completely water-soluble only requiring tap water to wash off parts and has excellent chemical & thermal stability when used within its working range. It can be used as a quench from any austenitizing media, except cyanide-base salts. It is not advisable to quench steel parts from temperatures > 1650°F into TEMPERING C-ALHT unless the parts are small and separated. For parts austenitized at temperatures > 1650ºF, a neutral bath at an intermediate temperature should be employed as a stabilizing medium before the isothermal quench in TEMPERING C-ALHT.

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Key Properties

• Formulated as a eutectic potassium/sodium nitrate mixture, it meets AMS 2821 Class 2, making it suitable for the annealing and solution heat treatment of aluminum alloys and other non-ferrous alloys, as well as tempering hardened steels.
• Exhibits exceptional fluidity in its molten state, is completely water-soluble for easy part washing, and maintains excellent chemical and thermal stability within its operating range of 480 - 1100°F.
• Not recommended for quenching steel parts from temperatures above 1650°F without using a neutral bath as an intermediate step to prevent part damage.
• Requires simple steel pots for temperatures up to 850°F, but higher temperatures necessitate alloy pots, especially in externally fired or radiant tube furnaces.
• Requires careful handling and storage, including the use of proper protective equipment and dry conditions for parts and fixtures to prevent splattering and contamination, with a specific warning against heating beyond 1100°F to avoid rapid decomposition and potential hazards.