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DIN1.2343 Tool Steel
Superior High-Temperature Performance
DIN 1.2343 excels in extreme thermal environments (up to 600°C/1112°F), retaining hardness, strength, and dimensional stability. Its high thermal conductivity minimizes heat-induced distortion, making it ideal for high-pressure die casting, hot forging dies, and aluminum extrusion tools.
Unmatched Thermal Fatigue Resistance
Engineered to withstand rapid heating/cooling cycles, this steel resists cracking and surface degradation, significantly extending tool life in plastic molding, non-ferrous metal processing, and thermal cycling applications.
Versatile & Cost-Effective Solution
Combining exceptional toughness with machinability, DIN 1.2343 suits diverse industries—from automotive to aerospace. Its balanced composition reduces downtime and maintenance costs, outperforming alternatives in demanding hot work tooling and general engineering scenarios.
- HONGXIN
- 中国
- 30DAYS
- 8000TONS/MONTH
- Information
DIN 1.2343 (AISI H11) Hot Work Tool Steel
Premium Solution for High-Temperature Tooling
1.Overview
DIN 1.2343 is a premium-grade hot work tool steel, equivalent to AISI H11, renowned for its exceptional toughness, resistance to thermal fatigue, and ability to retain mechanical properties at elevated temperatures (up to 600°C / 1112°F). Designed for demanding industrial applications, it combines high thermal conductivity with excellent wear resistance, making it a top choice for tooling and components exposed to cyclic thermal stress and abrasive conditions.
2.Chemical Composition & International Equivalents
| Grade | C | Mn | P | S | Si | Cr | V | Mo |
| DIN 1.2343 | 0.28-0.35 | 0.10-0.40 | / | / | 0.80-1.20 | 2.70-3.20 | 0.40-0.70 | 1.10-1.50 |
| ASTMH11 | 0.35-0.45 | 0.20-0.60 | 0.03 | 0.03 | 0.80-1.25 | 4.75-5.50 | 0.30-0.60 | 1.10-1.60 |
| JIS SKD6 | 0.32-0.42 | ≦0.50 | 0.03 | 0.03 | 0.80-1.20 | 4.50-5.50 | 0.30-0.50 | 1.00-1.50 |
| BH11 | 0.32-0.40 | ≦0.40 | 0.35 | 0.35 | 0.85-1.15 | 4.74-5.25 | 0.30-0.50 | 1.25-1.75 |
3.Mechanical & Thermal Properties
| Property | Metric Value | Imperial Value |
| Hardness (Air-Cooled) | 52-57 HRC | / |
| Elastic Modulus | 207 GPa | 30,000ksi |
| Impact Toughness (Charpy V-notch) | 13.6-33.9 J | 10.0-25.0 ft-lb |
| Thermal Conductivity | 42.2 W/m·K | 292.9 BTU·in/hr·ft²·°F |
| Density | 7.81 g/cm³ | 0.282 lb/in³ |
4.Supply Specifications
Size | Round | Dia 12-500mm |
Plate/Flat/Block | Thickness 8mm-300mm | |
| Width 210mm-710mm | ||
| Process | EAF+LF+VD+Forged+Heat treatment(optional) |
5.Heat Treatment Guidelines
Annealing
Slowly heat to 843 – 898(1550-1650 F) then slowly Cool to 538(1000) in heat treatment furnace. Then frosty in make public. After annealing hardness HBS: 235 Max
Hardening
DIN 1.2343(H11 Steel) steel having enormously high hardenability and should be hardened by cooling in yet appearance. The use of a salt bath or controlled mood furnace is desirable to minimize decarburization, and if not user-simple, pack hardening in spent arena coke is suggested. The temperature employed is usually 1800-1850F, depending upon size section.
Quenching
Quenching temperature / ℃ | salt bath furnace: 996
Quenching temperature / ℃ | controlled atmosphere furnace: 1010
The heat preservation time/min: 5 ~ 15
Quenching medium: air cooling .
Tempering
Tempering temperature / : 552
After tempering hardness HRC or future: 52
6.Key Applications
Hot Work Tooling: Die casting dies, forging dies, extrusion tooling.
Aerospace: Aircraft landing gear components.
Plastic Molding: High-wear inserts for engineering plastics.
Industrial Cutting: Hot shear blades, gripper dies.
7.Delivery Condition
For hot forged or hot rolled bar, usually the delivery condition is hot forged or rolled, annealed, rough turned.
For hot forged plate, usually the delivery condition is hot forged, annealed, milled surface.
For hot rolled plate, usually the delivery condition is hot rolled, annealed, black surface.
8.Production Equipment
Hongxin Mold Tech Co.,Ltd. owns 1 set of Hot Rolling Production Line at size range flats 8-80*210-710mm, rounds 16-50mm Dia.
12 sets of Hydraulic Forging Hammers from Power 560kgs to 6000kgs which could cover flats 40-300*210-710mm.
8 sets of EF+LF+VD
5 sets of ESR
9 sets of Milling Machines
10 sets of Turning Lathes
6 sets of Precision Milling Machines.
CERTIFICATION: GB/T19001-2016/ISO9001:2015
Why Partner With Us?
Global Stock: Immediate availability of standard and custom sizes.
Certified Quality: Compliant with DIN EN ISO 4957, ASTM A681, and JIS G4404.
Technical Expertise: Full support for heat treatment and application optimization.
ISO 9001 Certified: Rigorous quality assurance for reliability
