Steel, Bars, Forgings, and Tubing 0.80cr 1.8ni 0.25mo (0.38 0.43c) (SAE 4340)

Standard:
Revised:
  • 2003-06-16
 
  • HISTORICAL Access the latest revision: AMS6415U
Publisher:
  • SAE International
Pages:
9
Scope:

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, 3.5 inches and under in nominal thickness at time of heat treatment, 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; SAE ARP 1110 recommends practices to minimize such conditions.

History:
Standard Published Revision Status
AMS6415U 2016-12-07 Latest Revised
2012-07-02 Historical Revised
2007-02-27 Historical Revised
2003-06-16 Historical Revised
1997-11-01 Historical Revised
1996-06-01 Historical Revised
1995-05-01 Historical Reaffirmed
1988-10-01 Historical Revised
1984-10-01 Historical Revised
1979-10-15 Historical Revised
1973-12-01 Historical Revised
1968-11-01 Historical Revised
1964-01-31 Historical Revised
1954-05-01 Historical Revised
1951-10-01 Historical Revised
1949-08-01 Historical Revised
1945-08-01 Historical Revised
1942-06-01 Historical Revised
1940-01-23 Historical Issued
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