Spherical InduSteel Powder CLC 1.2312 Prehardened Mold Steel Powder (300HB/32HRC) with Improved Machinability

InduSteel Spherical Powder CLC 1.2312 Prehardened Mold Steel Spherical Powder (300HB/32HRC) with Improved Machinability Product Information -:- For detailed product information, please contact sales. -: InduSteel Spherical Powder CLC 1.2312 Prehardened Mold Steel Spherical Powder (300HB/32HRC) with Improved Machinability Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical InduSteel Powder CLC 1.2312 Prehardened Mold Steel Powder (300HB/32HRC) with Improved Machinability characteristics -:- For detailed product information, please contact sales. -: Spherical InduSteel Powder CLC 1.2312 Prehardened Mold Steel Powder (300HB/32HRC) with Improved Machinability Particle Size -:- For detailed product information, please contact sales. -: -:- -:- 0-15μm ,5-25μm, 15-45μm, 15-53μm,20-63um, 45-75μm, 45-105μm, 45-150μm ,75-150μm. (Various granularities can be customized according to customer requirements) -:- For detailed product information, please contact sales. -:

Spherical InduSteel Powder CLC 1.2312 Prehardened Mold Steel Powder (300HB/32HRC) with Improved Machinability Applicable processes -:- For detailed product information, please contact sales. -: Laser/electron beam additive manufacturing (SLM/EBM, 3D printing) Direct laser deposition (DLD) Used in thermal spray (TSA) Powder hot isostatic pressing (HIP) Metal injection molding (MIM) Powder metallurgy (PM) Laser cladding (LC), etc. -:- For detailed product information, please contact sales. -: Spherical InduSteel Powder CLC 1.2312 Prehardened Mold Steel Powder (300HB/32HRC) with Improved Machinability Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Industeel CLC 1.2312 Prehardened Mold Steel (300HB/32HRC) with Improved Machinability Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: Industeel CLC 1.2312 Prehardened Mold Steel (Free-Cutting Grade)** ## **1. Overview** **Industeel CLC 1.2312** is a premium **free-cutting, prehardened chromium-molybdenum alloy steel** specifically engineered for plastic injection molds and tooling applications requiring **exceptional machinability**. As the free-machining variant of the standard DIN 1.2311/P20 steel, it is supplied in a **quenched and tempered condition** with a guaranteed hardness of approximately **300 HB (32 HRC)**. The key distinguishing feature of 1.2312 is its **controlled sulfur content**, which forms manganese sulfide (MnS) inclusions that act as internal chip breakers, dramatically improving machinability. The **CLC (Cleanliness and Consistency)** quality designation ensures superior metallurgical control, providing a homogeneous structure with optimized sulfide distribution for consistent performance. This material is ideal for molds with extensive machining requirements, complex geometries, and applications where reduced machining time is a critical economic factor. ## **2. International Standards & Specifications** This material conforms to the international standard for free-machining prehardened mold steels, with enhanced quality assurance. * **Primary Standard:** * **DIN 1.2312 / EN ISO 4957 35CrMo2+S:** The defining European standard for free-cutting prehardened plastic mold steel. * **Key International Equivalents:** * **AISI P20+S (Modified):** American equivalent free-machining grade. * **Common Trade Names:** Often marketed as **GS-711, 1.2312, or P20 Free-Cutting**. * **Manufacturer's Designation:** * **Industeel CLC 1.2312:** The proprietary designation indicating **CLC (Cleanliness and Consistency)** quality. This ensures that the sulfur content and resulting MnS inclusions are optimally controlled and uniformly distributed, maximizing machinability benefits while minimizing potential anisotropy. ## **3. Chemical Composition (Weight %, per DIN 1.2312)** The composition is nearly identical to 1.2311, with the critical addition of sulfur to enable free-machining characteristics. | Element | Composition Range (%) | Role & Benefit | |---------|----------------------|----------------| | **Carbon (C)** | 0.33 – 0.40 | Provides fundamental strength and hardness. | | **Chromium (Cr)** | 1.80 – 2.10 | Enhances hardenability for uniform properties. | | **Molybdenum (Mo)** | 0.15 – 0.25 | Critical for hardenability in thick sections. | | **Manganese (Mn)** | 1.40 – 1.60 | Enhances hardenability and, crucially, combines with sulfur to form **manganese sulfide (MnS) inclusions**. | | **Silicon (Si)** | 0.20 – 0.40 | Deoxidizer and solid solution strengthener. | | **Sulfur (S)** | **0.05 – 0.06 (Key Feature)** | **The defining element.** Forms soft MnS inclusions that act as built-in chip breakers, lubricate the cutting tool edge, and significantly reduce cutting forces. This is the source of its **improved machinability**. | | **Phosphorus (P)** | ≤ 0.025 | Impurity, kept low for optimal toughness. | ## **4. Typical Physical & Mechanical Properties (As Prehardened)** * **Delivery Condition:** Quenched and tempered at the mill, ready for machining. * **Guaranteed Hardness:** **300 – 330 HB (32 – 34 HRC)** – Uniform throughout the cross-section (typically guaranteed up to 1000mm thickness). * **Tensile Strength:** 1000 – 1150 MPa (145,000 – 167,000 psi) * **Yield Strength (0.2% Offset):** 850 – 1000 MPa (123,000 – 145,000 psi) * **Elongation:** ≥ 10% (in 50mm) * **Impact Toughness (Charpy V-Notch):** **Slightly lower than 1.2311** – Typically ≥ 20 J (15 ft-lb) at room temperature. The MnS inclusions can reduce toughness, particularly in the transverse direction. * **Machinability:** **Outstanding / Excellent** – Rated **90-95% of 1% carbon steel**. This represents a **significant improvement (10-15%) over standard 1.2311**. Allows for higher cutting speeds, feeds, and extended tool life. * **Polishability:** **Good to Very Good** – The MnS inclusions can be pulled out during polishing, potentially limiting the ability to achieve the very highest mirror finishes (SPI A1) compared to 1.2311. Fine finishes (SPI A2-A3) are readily achievable. * **Weldability:** **Fair** – The sulfur content increases the risk of solidification cracking (hot cracking). Welding requires specialized procedures, careful choice of filler metal (very low sulfur), and is generally not recommended for critical areas. * **Physical Properties:** * **Density:** 7.85 g/cm³ * **Modulus of Elasticity:** 210 GPa * **Thermal Conductivity:** 36 W/m·K (at 20°C) * **Coefficient of Thermal Expansion:** 11.5 × 10⁻⁶/°C ## **5. Product Application** CLC 1.2312 is the optimal choice for molds where machining time and cost are primary concerns, and where the highest polish or extensive welding is not required. * **Plastic Injection Molds with Complex Geometry:** * **Large mold bases and frames** requiring extensive milling and drilling. * **Cavities and cores with deep pockets, intricate ribs, or substantial material removal.** * **Prototype molds and low-to-medium volume production molds** where machining efficiency is key. * **Tooling for Non-Cosmetic Parts:** * **Molds for technical components** where surface finish is less critical than dimensional accuracy. * **Blow molds** for industrial containers. * **Die Casting Tooling:** * **Backing plates, ejector housings, and support structures.** * **General Machined Components:** * **Jigs, fixtures, and machine parts** requiring good strength and stability with easy machining. ## **6. Key Features & Advantages** * **Superior Machinability:** The primary advantage. Reduces machining time by 15-30%, lowers tool wear, improves surface finish from machining operations, and allows for higher productivity. * **No Heat Treatment Required:** Eliminates distortion risks and reduces manufacturing lead time. * **Good Dimensional Stability:** The CLC quality ensures consistent behavior during machining. * **Excellent Chip Breaking:** Produces short, broken chips that are easy to evacuate, improving safety and process efficiency. * **Reduced Cutting Forces and Power Consumption:** Lower energy requirements during machining. * **Good Nitriding Response:** Can still be surface hardened via nitriding to improve wear resistance on selected areas. * **Cost-Effective for High-Machining-Content Tools:** The savings in machining time and tooling often outweigh the material cost premium. ## **7. Processing Guidelines & Trade-offs** * **Machining:** Exploit its free-cutting nature. Use sharp tools, higher speeds/feeds than for 1.2311. Enjoy excellent chip control. * **Polishing:** Be aware of the potential for "pitting" if MnS inclusions are pulled out. Use sequential abrasive steps. For highest polish, select 1.2311 instead. * **Welding:** **Generally discouraged.** If absolutely necessary, use ultra-low sulfur filler metals, extensive pre-heat (>300°C), and post-weld heat treatment. Weld quality will be inferior to 1.2311. * **EDM:** Performs well. Standard parameters apply. * **Design Consideration:** Anisotropy – Mechanical properties, especially toughness, are slightly directional due to the alignment of MnS stringers in the rolling direction. **Summary:** Industeel CLC 1.2312 is a specialized, performance-optimized mold steel that makes a clear trade-off: it sacrifices some polishability and weldability to gain outstanding machinability. For mold shops focused on reducing machining hours, improving throughput on CNC equipment, and manufacturing complex tools, it is an invaluable material. The CLC quality ensures that the benefits of sulfur addition are delivered consistently and effectively. It is not a universal replacement for 1.2311 but rather a strategic choice where machining efficiency is the dominant driver in the toolmaking process. -:- For detailed product information, please contact sales. -: Industeel CLC 1.2312 Prehardened Mold Steel (300HB/32HRC) with Improved Machinability Specification Dimensions Size： Diameter 20-1000 mm Length <7042 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: Industeel CLC 1.2312 Prehardened Mold Steel (300HB/32HRC) with Improved Machinability Properties -:- For detailed product information, please contact sales. -:

Spherical InduSteel Powder CLC 1.2312 Prehardened Mold Steel Powder (300HB/32HRC) with Improved Machinability Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical InduSteel Powder CLC 1.2312 Prehardened Mold Steel Powder (300HB/32HRC) with Improved Machinability -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of InduSteel Spherical Powder CLC 1.2312 Prehardened Mold Steel Spherical Powder (300HB/32HRC) with Improved Machinability -:- For detailed product information, please contact sales. -: Chemical Identifiers InduSteel Spherical Powder CLC 1.2312 Prehardened Mold Steel Spherical Powder (300HB/32HRC) with Improved Machinability -:- For detailed product information, please contact sales. -:

Packing of InduSteel Spherical Powder CLC 1.2312 Prehardened Mold Steel Spherical Powder (300HB/32HRC) with Improved Machinability -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Spherical Powder drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3513 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition