Browse Standards AMS6312F
Historical Revised 2001-03-01

Steel Bars, Forgings, and Tubing, 1.8ni 0.25mo (038-0.43c) (SAE 4640) AMS6312F

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

These products have been used typically for parts 0.250 inch (6.35 mm) and under in nominal section thickness at time of heat treatment requiring a through-hardening steel capable of developing hardness as high as 50 HRC when properly hardened and tempered and also parts of greater thickness requiring proportionately lower hardness, but usage is not limited to such applications.

AMS6312J
2015-12-03
Latest
Revised
AMS6312H
2011-05-17
Historical
Revised
AMS6312G
2006-05-17
Historical
Revised
AMS6312F
2001-03-01
Historical
Revised
AMS6312E
1994-04-01
Historical
Reaffirmed
AMS6312D
1981-04-01
Historical
Revised
AMS6312C
1978-01-15
Historical
Revised
AMS6312B
1971-05-15
Historical
Revised
AMS6312A
1942-03-01
Historical
Revised
AMS6312
1939-12-04
Historical
Issued

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