SAE AMS6409-1987
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 G43400)

Standard No.

SAE AMS6409-1987

Release Date

1987

Published By

SAE - SAE International

Status

Be replaced

Replace By

SAE AMS6409-1992

Latest

SAE AMS6409F-2021

Scope

Form: This specification covers a low-alloy steel in the form of bars@ forgings@ mechanical tubing@ and forging stock. Application: Primarily for parts required to meet stringent magnetic inspection criteria and having sections 3.5 in. (90 mm) and under in nominal thickness at time of heat treatment requiring a through-hardening steel capable of developing a minimum hardness of 30 HRC when properly hardened and tempered and also for parts of greater thickness but requiring proportionately lower hardness. Certain design and processing procedures may cause these products to become susceptible to stress-corrosion cracking after heat treatment; ARP 1110 recommends practices to minimize such conditions. These products are not recommended for use in parts heat treated to a tensile strength range having a maximum over 220@000 psi (1515 MPa) or where the high transverse properties of vacuum-arc-remelted or electroslag remelted steel are required.

SAE AMS6409-1987 history

• 2021 SAE AMS6409F-2021 Steel, Bars, Forgings, Mechanical Tubing and Forging Stock 0.80Cr - 1.8Ni - 0.25Mo (0.38 - 0.43C) (SAE 4340) Special Aircraft Quality Cleanliness Normalized and Tempered
• 2016 SAE AMS6409E-2016 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)
• 2012 SAE AMS6409D-2012 Steel, Bars, Forgings, and Tubing 0.80Cr 1.8Ni 0.25Mo (0.38-0.43C) (SAE 4340) Special Aircraft Quality Cleanliness, Normalized and Tempered
• 2007 SAE AMS6409C-2007 Steel, Bars, Forgings, and Tubing 0.80Cr 1.8Ni 0.25Mo (0.38-0.43C) (SAE) 4340) Special Aircraft Quality Cleanliness, Normalized and Tempered
• 2002 SAE AMS6409B-2002 Steel, Bars, Forgings, and Tubing 0.80Cr 1.8Ni 0.25Mo (0.38-0.43C) Special Aircraft Quality Cleanliness, Normalized and Tempered
• 1996 SAE AMS6409A-1996 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)
• 1992 SAE AMS6409-1992 STEEL BARS, FORGINGS, AND TUBING 0.80Cr - 1.8Ni - 0.25Mo (0.38 - 0.43C) (SAE 4340) Special Aircraft Quality Cleanliness Normalized and Tempered
• 1987 SAE AMS6409-1987 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 G43400)