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SAE AMS6409E Steel, Bars, Forgings, and Tubing 0.80Cr - 1.8Ni - 0.25Mo (0.38 - 0.43C) (SAE 4340) Special Aircraft Quality Cleanliness Normalized and Tempered - UNS G43406

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SAE International

Steel, Bars, Forgings, and Tubing 0.80Cr - 1.8Ni - 0.25Mo (0.38 - 0.43C) ( 4340) Special Aircraft Quality Cleanliness Normalized and Tempered - UNS G43406
 N AMS6409E

 

Annotation

 

Form

This specification covers a low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.

Application

These products have been used typically for parts required to meet stringent magnetic particle inspection criteria, having sections 3.5 inches (89 mm) and under in nominal thickness at time of heat treatment, and requiring a through-hardening steel capable of developing a minimum hardness of 40 HRC when properly hardened and tempered and also for parts of greater thickness, but requiring proportionately lower hardness, but usage is not limited to such applications.

Certain design and processing procedures may cause these products to become susceptible to stress-corrosion cracking after heat treatment; ARP1110 recommends practices to minimize such conditions.

These products are not recommended for use in parts heat treated to a hardness greater than 46 HRC (ultimate tensile strength over 220 ksi (1517 MPa)) or where the high transverse properties of remelted steel are required (see 8.2).

 

Автоматический перевод:

 

Сталь, запреты, создание, и шланг трубки 0.80Cr - 1.8Ni - 0.25 мес (0.38 - 0.43C) (SAE 4340) специальная качественная чистота самолета, нормализованная и умеренная - UNS G43406

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