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SAE AMS6456 Revision D, February 1, 2007
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Steel, Welding Wire 0.80Cr - 1.8Ni - 0.25Mo (0.35 - 0.40C) (SAE 4340 Mod) Vacuum Melted, Environment-Controlled Packaging
Includes all amendments and changes through Reaffirmation Notice , November 2011
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AIA/NAS Aerospace Standards

This specification covers a low-alloy steel in the form of welding wire.


This wire has been used typically as filler metal for gas-metal-arc or gas-tungsten-arc welding of critical weldments of low-alloy steels requiring a joint capable of being heat treated to a strength level approximating that of the basis metal, but usage is not limited to such applications.


Wire shall be classified as follows:

Type 1 - Bare Wire

Type 2 - Copper Coated

Type 1 shall be supplied unless Type 2 is specified.