H11 Vac Melt Annealed - Aircraft Alloys - Fry Steel

Aircraft Alloys / H-11 VAC MELT ANN

H11 Vac Melt is a 5% chromium alloy hot-work tool steel known for its incredible impact toughness. This double vacuum melted material provides a level of cleanliness that improves the level of mechanical properties. The alloy is a deep-hardening, air-hardening steel that exhibits minimal size change during heat treatment. This steel is used for hot tooling applications where maximum resistance to cracking is required. Alloy H11 is used to produce hot punches, die casting dies, forging dies, hot shear blades, extrusion tooling and highly stressed structural parts such as aircraft landing gear. (UNS T20811)

Chemicals Makeup of H11 Vac Melt

Element Min Max
Carbon, C 0.38 0.43
Manganese, Mn 0.2 0.4
Silicon, Si 0.8 1
Phosphorus, P - 0.015
Sulfur, S - 0.015
Chromium, Cr 4.75 5.25
Molybdenum, Mo 1.2 1.4
Nickel, Ni - 0.25
Copper, Cu - 0.35
Vanadium, V 0.4 0.6

Common Applications of H11 Vac Melt

  • Aerospace Aerospace
  • Industrial Industrial


  • Great Impact Toughness
  • Resistance To Cracking
  • Minimal Thermal Expansion

We stock H-11 VAC MELT ANN to the following specifications:

  • AMS-6485
  • AMS-6487
  • AMS-6488

Click on a cross-section to see the sizes we stock:

Subscribe now!

Stay up to date with the latest on Fry Steel and industry news.