Alloy Steel H-11 (AMS 6485 / AMS 6487 / AMS 6488)

Technical Data Sheet


Chemical Composition Limits
Weight% C Mn Si Cr Mo V
DYNAFLEX VAC-ARC® 0.40 0.30 0.90 5.00 1.30 0.50

Alloy H-11 (DYNAFLEX VAC-ARC®) is a medium alloyed steel with a relatively low carbon content. H-11 has good toughness and deep hardens by air quench from heat treatment. H-11 ultra high strength grade makes it idea for structural applications such as aircraft landing gear. It resists softening at temperatures up to 1000 F while retaining good ductility and toughness even at strength levels on the order of 275 ksi.

Alloy H-11 (DYNAFLEX 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
DYNAFLEX VAC-ARC® Longitudinal 1793 1482 8 30
Austenitize at 1800°F (1010°C) for 15-45 minutes and air cool
Temper three times for 2-3 hours at a temperature not lower than 1000°F (538°C) and air cool

AMS 6485
AMS 6487
AMS 6488
UNS T20811


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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.