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H11
Qilu
Product Description
Hot forged H11 round bar and blocks, supplied annealed for machining or quenched & tempered to 46-52 HRC, with heat treatment and ultrasonic testing done in our own workshop.
Equivalent to: AISI H11 · DIN 1.2343 / X37CrMoV5-1 · JIS SKD6 · GB 4Cr5MoSiV · BS BH11
H11 SKD6 BH11 1.2343 X37CrMoV5-1 4Cr5MoV Hot Work Tool Steel
H11 SKD6 BH11 1.2343 X37CrMoV5-1 4Cr5MoV Hot Work Tool Steel
H11 SKD6 BH11 1.2343 X37CrMoV5-1 4Cr5MoV Hot Work Tool Steel
Supply form — Round bar, flats, plates and blocks
Process — Hot forged / hot rolled
Condition — Annealed (≤ 229 HB), or QT to 46-52 HRC
Diameter range — 10-500 mm
Standard — ASTM A681
Certificate — EN 10204 3.1 standard, 3.2 on request
Lead time — 15-30 days
H11 is a 5 % chromium hot-work tool steel from ASTM A681. The Cr-Mo-V base gives it resistance to thermal fatigue (heat checking), which is why it is the standard grade for aluminium die-casting and extrusion tooling. It is closely related to H13 but with a slightly lower vanadium range, giving a touch more toughness at the same working hardness.
| Element | C | Mn | Si | Cr | Mo | V |
|---|---|---|---|---|---|---|
| ASTM A681 H11 | 0.33-0.43 | 0.20-0.50 | 0.80-1.20 | 4.75-5.50 | 1.10-1.60 | 0.30-0.60 |
Typical values. H11 is normally supplied annealed for machining and hardened after rough machining.
| Property | Annealed | QT (typical) |
|---|---|---|
| Hardness | ≤ 229 HB | 46-52 HRC |
| Tensile strength, Rm (MPa) | — | 1500-1700 |
| Yield strength, Re (MPa) | — | ≥ 1280 |
| Impact, KV (J) | — | ≥ 20 |
| Standard | Designation |
|---|---|
| ASTM (USA) | H11 |
| DIN / EN (Germany/Europe) | 1.2343 / X37CrMoV5-1 |
| JIS (Japan) | SKD6 |
| GB (China) | 4Cr5MoSiV |
| BS (UK) | BH11 |
| Werkstoff Nr. | 1.2343 |
Die casting — aluminium die-casting dies, cores and inserts
Extrusion — extrusion dies, liners and stems for aluminium
Hot forging — forging dies and die inserts
Plastics — injection mold cavities and hot runner components
H11 is hardened from 1000-1030 °C in air or gas and double tempered at 540-600 °C to reach 46-52 HRC. Double tempering transforms retained austenite and stabilises dimension — critical for die inserts that must not distort in service. We can supply pre-hardened and rough-machined blocks ready for finish machining.
Most suppliers in this business are traders who subcontract everything. We run our own processes, which means shorter cycles and one point of accountability when something needs fixing.
Heat treatment shop — quenching, tempering and vacuum heat treatment to your target hardness, with furnace charts recorded per batch
Machining shop — rough turning, peeling, milling and cutting to length, so your bar or block arrives ready for finish machining
Testing — ultrasonic per ASTM A388 / EN 10228-3, hardness mapping across the section, microstructure on request
Certification — EN 10204 3.1 as standard, 3.2 available with third-party witness (ABS, BV, CCS, GL)
Export packing — bundled, end-capped and rust-protected for sea freight
Both are 5 % Cr hot-work steels and are often interchangeable. H13 has a slightly higher vanadium range (0.80-1.20 % vs 0.30-0.60 %), giving a little more wear resistance at the same hardness; H11 has marginally higher toughness. For most die-casting service either works — see our H13 tool steel page.
Yes. We quench and temper to your target hardness, rough-turn or mill to size, and ultrasonically test. Pre-hardened blocks arrive ready for finish machining.
EN 10204 3.1 mill certificate as standard, with heat analysis and mechanical test results. 3.2 with third-party witness (ABS, BV, CCS, GL) on request.
Send us your grade, dimensions, quantity, required hardness and destination port. You will get a quotation with the full technical proposal within 24 hours.
Email: enquiry@qilumetal.com | Web: www.qilumetal.com
