H11 STEEL
H-11 hot work tool steel.
H-11 is a 5% chromium hot work tool steel with excellent impact toughness and good resistance to thermal fatigue cracking. Compared to H13, it contains less vanadium, which results in higher toughness but somewhat reduced wear resistance and temper resistance. It is a deep-hardening, air-hardening steel with minimal size change during heat treatment. H11 performs well under conditions involving thermal shock and water cooling.
Note: Specialty steel products are available upon request and all stock is subject to mill availability.
H11 steel chemical composition.
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.35 – 0.40 |
| Chromium (Cr) | 4.75 – 5.50 |
| Molybdenum (Mo) | 1.10 – 1.75 |
| Vanadium (V) | 0.25 – 0.50 |
| Silicon (Si) | 0.80 – 1.20 |
| Manganese (Mn) | 0.20 – 0.50 |
| Iron (Fe) | Balance |
H11 key features.
Excellent impact toughness
Higher toughness than H13 (due to lower vanadium content)
Good thermal fatigue cracking resistance (heat checking)
Excellent resistance to gross cracking & thermal shock
Minimal size change during hardening
Air-hardening, deep-hardening steel
H11 available in multiple shapes.
Manjula Steel Industries is the largest stockiest and supplier of H11 tool steel in flat, square and round bar. We provide steel in all sizes as your requirements. H11 die steel is available in flat, square and round shape. Consult our team who will assist you for h11 steel query.
Mechanical properties.
| Property | Value |
|---|---|
| Tensile Strength | ~1860 MPa |
| Yield Strength | ~1500 MPa |
| Hardness (as delivered, annealed) | ~197 HB |
| Hardness (after heat treatment) | 46 – 50 HRC |
| Elongation | ~10 – 12 % |
| Impact Toughness (Charpy V-notch) | High |
Heat treatment & processes.
| Process | Temperature Range | Notes |
|---|---|---|
| Annealing | 800 – 840°C | Furnace cool at max. 20°C/hr to 600°C, then air cool |
| Stress Relieving | ~650°C | After machining, slow cool |
| Hardening | 1000 – 1050°C | Preheat in 2 steps (600–650°C, 850–900°C), then heat to final temp |
| Quenching | Air or oil | Air cooling preferred (minimal distortion) |
| Tempering | 540 – 650°C | Double temper recommended; hardness 46–50 HRC |
International grade equivalents.
| Standard | Designation |
|---|---|
| AISI | H11 |
| DIN | X37CrMoV5-1 |
| Werkstoff Nr. | 1.2343 |
| UNS | T20811 |
| BH | BH11 |
H11 applications.
H11 hot work tool steel.
H-11 hot work tool steel offers an exceptional balance of toughness, resistance to cracking, and dimensional stability during heat treatment. Its lower vanadium content compared to H13 provides higher impact toughness, making it especially suitable for demanding hot work applications where resistance to thermal shock and gross cracking is critical.
With reliable performance in die casting, forging, extrusion, and hot shear operations, H11 is a proven choice for tooling that requires maximum durability under severe service conditions.