H11 Tool Steel Round & Flat Bar
Arch Metals supplies H11 tool steel round and flat bar from Dallas, Texas, to die makers and aerospace manufacturers across Texas and the surrounding states. H11 is a 5% chromium hot-work tool steel with excellent toughness and resistance to heat checking. It is also used as an ultra-high-strength structural steel. We supply annealed H11 to ASTM A681 and aircraft-quality bar to AMS 6485 with certified material and saw cutting to size. Request a quote and we’ll confirm sizes and availability.
H11 Tool Steel Forms
- Round bar, annealed
- Flat bar and blocks, annealed
- Aircraft-quality bar on request
Size availability changes with mill supply. Send us your sizes through our quote request form and we’ll confirm stock, lead time and pricing.
H11 Tool Steel Conditions and Specifications
- Annealed bar (ASTM A681): supplied soft for machining and then hardened.
- Aircraft-quality bar (AMS 6485): premium-melted H11 for high-strength structural parts.
- Heat treatment (Air quench): typically hardened and tempered to about 38–55 HRC depending on the application.
Not sure which condition or specification your drawing calls for? Send us the print requirements and we’ll match the material.
Typical Properties of H11 Tool Steel
- Annealed hardness: about 192–229 HB
- Working hardness: about 38–55 HRC after hardening and tempering
- Toughness: very high for a hot-work steel
- Density: 0.280 lb/in³ (7.75 g/cm³)
- Chemistry: about 0.4% carbon, 5% chromium, 1.3% molybdenum and 0.5% vanadium
These are typical values for H11 tool steel. Guaranteed minimums vary by specification, condition and size, so check the governing spec or your mill cert for design values.
Why Engineers Choose H11 Tool Steel
H11 keeps its hardness at high working temperatures and resists heat checking from repeated heating and cooling. It is tougher than H13, so it is preferred where cracking is the main risk. In structural form it reaches very high strength with good toughness. For cold-work tooling under impact, see S7 tool steel. Common uses for H11 include:
- Die-casting and extrusion dies
- Hot forging and hot shear tools
- Aircraft structural parts and fasteners
- High-strength shafts and missile components
H11 Tool Steel FAQs
What is the difference between H11 and H13?
H13 has more vanadium for better wear and heat-check resistance; H11 has higher toughness and is less prone to cracking.
Is H11 used for aircraft parts?
Yes. Aircraft-quality H11 to AMS 6485 is used for ultra-high-strength structural components such as fittings and fasteners.
Can H11 be air hardened?
Yes. H11 is air hardening, which keeps distortion low during heat treatment.
Cut-to-Size H11 Tool Steel With Delivery Across Texas
We ship H11 tool steel throughout Texas, Oklahoma, Louisiana, New Mexico and Arizona, and we saw bar and plate to the size you need. See our processing services for cutting options, or browse all the metals we supply. We also supply S7, A3 and D7 tool steel.
To get pricing, send us the grade, condition, form, size, length and quantity through our quote request form, or call (888) 444-6061.