When it comes to hot work tool steels, 1.2343 steel is one of the most widely used and trusted materials across industries such as automotive, die casting, forging, and plastic molding. Known for its excellent combination of toughness, thermal resistance, and wear resistance, 1.2343 is often compared to 1.2344 (H13).
Learn everything about 1.2343 steel (H11): chemical composition, mechanical properties, heat treatment, advantages, and comparison with 1.2344. Find the best applications and contact Otai Special Steel for supply.
What is 1.2343 Steel?
1.2343 is a hot work tool steel standardized under DIN EN ISO. In the U.S., it is often compared to H11 tool steel.
Key features of 1.2343 steel include:
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Excellent toughness
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Good resistance to thermal fatigue cracking
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High hardenability
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Better resistance to shock loading compared to 1.2344
Chemical Composition of 1.2343
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.32 – 0.39 |
| Silicon (Si) | 0.80 – 1.20 |
| Manganese (Mn) | 0.20 – 0.50 |
| Chromium (Cr) | 4.80 – 5.50 |
| Molybdenum (Mo) | 1.10 – 1.40 |
| Vanadium (V) | 0.30 – 0.60 |
👉 The relatively lower vanadium content compared to 1.2344 makes 1.2343 tougher and more resistant to shock loads.
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (N/mm²) | 1000 – 1300 |
| Yield Strength (N/mm²) | 850 – 1000 |
| Hardness (Annealed) | ~ 200 HB |
| Hardness (After Heat Treatment) | 44 – 52 HRC |
| Impact Toughness | High |
1.2343 vs 1.2344 Steel
| Property | 1.2343 (H11) | 1.2344 (H13) |
|---|---|---|
| Toughness | Higher | Lower |
| Wear Resistance | Lower | Higher |
| Thermal Resistance | Good | Excellent |
| Shock Resistance | Excellent | Moderate |
👉 If you need higher toughness and resistance to cracking, choose 1.2343.
👉 If you need higher wear resistance under extreme heat, choose 1.2344.
Applications of 1.2343
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Die Casting Molds – aluminum, magnesium, and zinc alloys
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Forging Dies – hammer dies, press dies
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Extrusion Tools – extrusion dies for non-ferrous metals
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Plastic Molds – especially when requiring high toughness
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Aircraft Components – parts requiring thermal resistance
Advantages
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Excellent impact strength
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Good machinability in annealed condition
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High thermal fatigue resistance
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Can be used in both hot and cold work applications
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Lower risk of cracking compared to 1.2344
Cost Consideration
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1.2343 steel is usually more affordable than 1.2344, due to lower alloying content.
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Best for projects where toughness and crack resistance are more important than extreme wear resistance.
Conclusion
1.2343 steel is a reliable hot work tool steel that offers a great balance of toughness, thermal resistance, and cost-effectiveness. It is especially suited for die casting, forging, and extrusion applications where cracking and impact resistance are critical.
At Dongguan Otai Special Steel, we supply 1.2343 in different sizes and heat-treatment conditions. If you’re considering whether 1.2343 is the right material for your project, feel free to contact us—we’re here to help.
📧 Email: [email protected]
📱 WhatsApp: +8613642825398
