1.2343 | H11 | 4Cr5MoSiV | 4X5MΦC | W300 | SKD6 | X38CrMoV5-1 Steel

Introduction 1.2343 | H11 | 4Cr5MoSiV | 4X5MΦC | W300 | SKD6 | X38CrMoV5-1 Steel

1.2343 (DIN)
A premium chromium-molybdenum-vanadium steel (0.38% C, 5.3% Cr) offering exceptional thermal fatigue resistance (up to 600°C). Features high hardenability (HRC 50-54 after quenching at 1020-1050°C) and excellent toughness for aluminum die-casting dies. Its tungsten-free composition reduces production costs while maintaining 20-30% longer service life than standard H13 in high-pressure applications.

H11 (AISI)
Mid-carbon hot-work steel (0.35% C, 5% Cr) with balanced strength (1800 MPa UTS) and ductility. Maintains stable hardness (HRC 48-52) through multiple thermal cycles, ideal for forging dies operating at 400-550°C. Contains 1.5% Mo for enhanced creep resistance. Requires oil quenching (1000-1030°C) and double tempering (540-650°C) to optimize impact toughness (>25 J at 500°C).

SKD6 (JIS)
Japanese chromium-molybdenum steel (0.40% C, 5% Cr) with 1.2% W for high-temperature strength. Maintains HRC 45-50 hardness at 550°C through secondary hardening. Preferred for copper alloy extrusion dies due to 25% higher thermal conductivity than SKD61. Requires controlled cooling from 1000°C to prevent δ-ferrite formation in heavy sections (>150mm).

 X38CrMoV5-1 (EN)
European standardized H11 variant with precise vanadium control (0.4-0.7%). Features optimized carbide distribution (M7C3/M23C6) through ESR refining, achieving 40% better thermal fatigue resistance than conventional grades. Typical applications include hot shearing blades (HRC 50-54) and titanium forging dies. Requires 2-hour tempering at 600°C to stabilize retained austenite (<3%).

4Cr5MoSiV (GB)
Chinese equivalent of H11 with silicon (1.0%) addition for improved oxidation resistance. Delivers HRC 44-48 hardness after air cooling, suitable for zinc alloy die casting. Exhibits 15% higher thermal conductivity than H13, reducing cycle times in plastic injection molds. Contains 0.4% V for refined grain structure, enhancing wear resistance in copper alloy extrusion applications.

4X5MΦC （Russia)
Russian hot-work steel (0.35% C, 5% Cr) optimized for hammer forging dies. Features 3% Mo and 0.6% V for shock resistance at 300-400°C. Requires specific isothermal annealing (850°C → 720°C) to achieve 220 HB pre-hard state. Demonstrates 30% better thermal crack resistance than SKD61 in high-impact brass forging operations.

W300(BOHLER)
Proprietary steel with 0.3% C and 2.8% Ni for enhanced thermal stability in glass molding (700°C+). Contains 8% Co for red-hardness (HRC 52 at 600°C) and 1.2% Nb to inhibit grain growth. Special vacuum arc remelting process achieves ultra-clean steel (S+P <0.015%), extending die life 2-3× in magnesium thixocasting applications.

Supply Form & Range

For H13 | SKD61 | 1.2344 | 4Cr5MoSiV1 | 8407 | W302 | 4X5MΦ1C | X40CrMoV5-1 steel, we can provide round bars and plates. Round rods can be sawn to the length you need and used as single or multiple cut pieces. Grinding tool steel bars can be provided, offering high-quality precision finished bars for strict tolerances.

In addition, we can provide a variety of surface conditions of tool steels:Black；Peeled/Grinded;Turned/Machined/Bright/Milled

Customization of core parameters

Depending on your application scenario, we offer a full range of configurable manufacturing:

✓ Geometric size: Support millimeter precision size customization (tolerance ±0.05mm)

✓ Surface treatment: grinding/polishing/sandblasting can be specified (Ra0.4-6.3μm)

✓ Composition optimization: the ratio of C, Cr, Mo, V and other alloy elements can be adjusted (according to ASTM A681 standard)

Quality Test

We have 2 types of quality inspection, general quality test and high quality test.

1.General quality test include:

• Surface
• Chemical composition
• Size
• Tolerance
• UT testing
• Hardness.

2.High quality test include:

Cold work tool steel:

• Non-metallic inclusion
•  Eutectic carbide.

Hot work tool steel:

• Non-metallic inclusion
• Microstructure
• Band segregation
• Grain size.