Rationale: AMS4944L deletes AS6279 that does not apply to hydraulic tubing. AMS4944K resulted from an update of this specification and included a reduction in hydrogen content and removal of an increased sample weight allowance (Table 1), use of vacuum in the first consumable melting (3.2), use of vacuum/inert gas furnaces (3.3.2), revision of tubing size in tolerance Table 4, included the addition of AS6279 (3.7) (now deleted), reduced flarability sampling (4.3.3) and revised reporting (4.5).
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Also known as: SAE AMS 4944
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