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Aircraft Steel HY-TUF Vac Melt (AMS 6418 / AMS 6425)

Technical Data Sheet

LESCALLOY HY-TUF VAC ARC® is a high strength low alloy steel. within the tensile range 220/240 ksi (1517/1655MPa) LESCALLOY HY-TUF VAC ARC has good ductility, fracture toughness and impact strength. HY-TUF is most commonly used for aircraft landing gear, flap tracks and other structural applications.

Chemical Composition Limits
Weight%	C	Mn	Si	Ni	Cr	Mo
LESCALLOY HY-TUF VAC-ARC®	0.25	1.35	1.50	1.80	0.30	0.40

Availability
LESCALLOY HY-TUF VAC ARC® is available in bar (round bar). For all stock availability contact Sales.

Typical Mechanical Properties

Material	Orinentation	Ultimate Tensile Strength (Mpa)	0.2 % Yield Strength (Mpa)	% Elongation	% Reduction of Area
LESCALLOY HY-TUF VAC ARC®	Transverse	1517	1276	5	30
Typical Transverse specification limits after the following heat treatments 1725°F (940 °C), one hour, air cool 1600°F (871°C), one hour, oil quench 550°F (288°C), two hours, air cool

Specifications
AMS 6418
AMS 6425 (Vac Melt)
AMS 2300
AMS 2301
AMS 2304
AMS-S-7108
MIL-S-7108
ASTM A322
UNS K32550
DMS-1841 Grd B
DMS-1841 Grd A

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Disclaimer
Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.