Alloy 4340 AMS 6414 / 6415

 

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AMS 6414 (4340)

2%NiCrMo Steel Single Melted or Vacuum Arc Remelted (VAR)

Features & Benefits Chemical Composition (Wt %)

• High strength (1800 MPa)
• Good ductility
• Resistant to shock
• Excellent transverse properties in VAR material

Applications

• Aircraft landing gear component
• Gears
• Con Rods

	Min	Max
C	0.38	0.43
Si	0.15	0.35
Mn	0.65	0.90
P	-	0.010
S	-	0.010
Cr	0.70	0.90
Mo	0.20	0.30
Ni	1.65	2.00

Supply Condition & Availability Heat Treatment

Supplied annealed, normalised or Quench and double temper. normalised and tempered

Also available untreated for forging

Longitudinal Mechanical Properties (after final heat treatment)

Tensile Strength	Yield Strength	Elongation	Reduction of area
	(0.2% Proof Strength)
MPa	MPa	%	%
Min	Min	Min	Min
1793	1496	10	30

Transverse Mechanical Properties (after final heat treatment)

Nominal Cross Sectional Area Sq Cms	Tensile Strength MPa	Yield Strength (0.2% Proof Strength) MPa	Reduction of Area %	Reduction of Area %	Elongation %
	Min	Min	Min (average of all tests)	Min (individual test)	Min
645	1793	1496	30	25	6
646 - 929	1793	1496	25	20	5
> 929	1793	1496	20	15	4

Care has been taken to ensure that the information herein is accurate, but AEON Materials Corp. does not accept responsibility for errors or for information which is found to be misleading.