1.2312 Tool Steel
1.2312 tool steel is a widely used pre-hardened tool steel designed for high-performance molds and tooling applications. Known for its excellent machinability and toughness, it is a preferred choice in industries like plastic molding, die casting, and general engineering. But what makes it stand out? Let’s dive deep into its properties, applications, and advantages.
What is 1.2312 ?
1.2312 is a pre-hardened, high-quality tool steel that contains sulfur to enhance its machinability. It is similar to 1.2311 but with improved cutting performance, making it ideal for complex machining processes. Since it is pre-hardened to 28-34 HRC, it eliminates the need for additional heat treatment, reducing production time and costs.
Key Chemical Composition of 1.2312
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.35 – 0.40 |
| Silicon (Si) | 0.20 – 0.40 |
| Manganese (Mn) | 1.30 – 1.60 |
| Chromium (Cr) | 1.80 – 2.10 |
| Molybdenum (Mo) | 0.15 – 0.25 |
| Sulfur (S) | 0.05 – 0.10 |
Properties and Benefits of 1.2312
- Pre-Hardened (28-34 HRC): No need for further heat treatment.
- Excellent Machinability: Easier to machine than 1.2311, reducing tooling wear and production costs.
- Good Toughness and Wear Resistance: Suitable for high-load applications.
- Uniform Hardness Distribution: Ensures consistent mold performance.
- Moderate Corrosion Resistance: Can be nitrided for enhanced surface hardness and wear resistance.
Applications of 1.2312
- Plastic Injection Molds: Ideal for large and complex mold bases.
- Die Casting Molds: Used for aluminum, zinc, and magnesium die casting dies.
- Press and Forming Tools: Suitable for press tools and forming dies.
- Automotive Parts: Used in the production of mold components for the automotive industry.
- Machine Parts: Applied in general engineering where high machinability is needed.
Comparison: 1.2312 vs. 1.2311
| Property | 1.2312 | 1.2311 |
| Hardness (HRC) | 28-34 | 28-34 |
| Machinability | Excellent (higher sulfur content) | Good |
| Corrosion Resistance | Moderate | Moderate |
| Polishability | Moderate | Excellent |
| Toughness | Slightly lower due to sulfur | High |
| Applications | Machined mold bases, general tooling | High-polish molds, die casting |
Heat Treatment and Processing Guidelines
-
Stress Relieving: Heat to 550-600°C, hold for 1-2 hours, then cool slowly.
-
Nitriding: Can be nitrided to increase surface hardness and wear resistance.
-
Polishing and Texturing: Not as good as 1.2311 for high-gloss applications but sufficient for most machining needs.
Conclusion
1.2312 tool steel is an excellent choice for mold bases, die casting, and general tooling due to its pre-hardened state, superior machinability, and good toughness. Its enhanced sulfur content makes it easier to machine than 1.2311, saving both time and costs. Understanding its properties will help you make the best decision for your tooling and mold applications.
For more details or to place an order, contact us at [email protected] or via WhatsApp +8613642825398.
