Spherical InduSteel Powder CLC 1.2738 Prehardened Mold Steel Powder (300HB/30HRC) for Thick Sections

InduSteel Spherical Powder CLC 1.2738 Prehardened Mold Steel Spherical Powder (300HB/30HRC) for Thick Sections Product Information -:- For detailed product information, please contact sales. -: InduSteel Spherical Powder CLC 1.2738 Prehardened Mold Steel Spherical Powder (300HB/30HRC) for Thick Sections Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical InduSteel Powder CLC 1.2738 Prehardened Mold Steel Powder (300HB/30HRC) for Thick Sections characteristics -:- For detailed product information, please contact sales. -: Spherical InduSteel Powder CLC 1.2738 Prehardened Mold Steel Powder (300HB/30HRC) for Thick Sections 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 1.2738 Prehardened Mold Steel Powder (300HB/30HRC) for Thick Sections 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 1.2738 Prehardened Mold Steel Powder (300HB/30HRC) for Thick Sections Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Industeel CLC 1.2738 Prehardened Mold Steel (300HB/30HRC) for Thick Sections Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: Industeel CLC 1.2738 Prehardened Mold Steel for Thick Sections** ## **1. Overview** **Industeel CLC 1.2738** is a premium **nickel-alloyed, prehardened chromium-molybdenum mold steel** specifically engineered for **large, thick-section plastic injection molds and die-casting tooling**. Supplied in a **quenched and tempered (prehardened) condition** with a guaranteed hardness of approximately **300 HB (30-32 HRC)**, this steel is distinguished by its **exceptional through-hardenability, high toughness, and minimal distortion characteristics**. The addition of approximately 1% nickel significantly enhances core toughness and impact strength, making it the material of choice for massive mold bases, large cavities, and heavy-duty tooling components where uniform mechanical properties and resistance to catastrophic failure are paramount. The **CLC (Cleanliness and Consistency)** quality ensures superior internal soundness and isotropic properties throughout large cross-sections. ## **2. International Standards & Specifications** This material conforms to the international standard for high-hardenability, nickel-alloyed prehardened mold steels. * **Primary Standard:** * **DIN 1.2738 / EN ISO 4957 40CrMnNiMo8-6-4:** The defining European standard for high-hardenability prehardened mold steel. * **Key International Equivalents:** * **AISI P20+Ni / P20 Modified:** American equivalent, often designated as a premium P20 with nickel addition. * **Common Trade Names:** Widely known as **GS-318, 1.2738, or P20+Ni**. * **ISO 4957:** Classified under **40CrMnNiMo8-6-4**. * **Manufacturer's Designation:** * **Industeel CLC 1.2738:** The proprietary designation indicating **CLC (Cleanliness and Consistency)** quality, guaranteeing exceptional homogeneity and predictable performance in extremely thick formats. ## **3. Chemical Composition (Weight %, per DIN 1.2738)** The composition is optimized for deep hardening and high toughness through nickel and balanced alloying. | Element | Composition Range (%) | Role & Benefit | |---------|----------------------|----------------| | **Carbon (C)** | 0.37 – 0.43 | Provides base strength and hardness. Slightly higher than standard P20 (1.2311) for increased strength. | | **Chromium (Cr)** | 1.80 – 2.10 | Enhances hardenability and provides moderate corrosion resistance. | | **Molybdenum (Mo)** | 0.15 – 0.25 | Critical for hardenability, especially in combination with nickel, and improves toughness. | | **Nickel (Ni)** | **0.90 – 1.20 (Key Feature)** | **The defining alloying element.** Dramatically increases **core toughness and impact strength**, improves hardenability for thicker sections, and enhances fatigue resistance. This is the primary differentiator from 1.2311. | | **Manganese (Mn)** | 1.40 – 1.60 | Enhances hardenability and works with sulfur for machinability. | | **Silicon (Si)** | 0.20 – 0.40 | Deoxidizer and solid solution strengthener. | | **Sulfur (S)** | ≤ 0.005 (Standard CLC quality) | Kept very low to ensure excellent **weldability, polishability, and isotropic toughness**. | | **Phosphorus (P)** | ≤ 0.025 | Impurity, minimized for optimal toughness. | ## **4. Typical Physical & Mechanical Properties (As Prehardened)** * **Delivery Condition:** Quenched and tempered at the mill, ready for machining. * **Guaranteed Hardness:** **290 – 330 HB (30 – 34 HRC)** – **Exceptional uniformity guaranteed in very thick sections (commonly up to 1500mm or more).** * **Tensile Strength:** 1050 – 1200 MPa (152,000 – 174,000 psi) * **Yield Strength (0.2% Offset):** 900 – 1050 MPa (131,000 – 152,000 psi) * **Elongation:** ≥ 12% (in 50mm) * **Impact Toughness (Charpy V-Notch):** **≥ 40 J (29 ft-lb) at room temperature** – **Significantly higher (50-100%) than standard 1.2311**, providing superior resistance to chipping and crack propagation. * **Machinability:** **Very Good** – Comparable to or slightly better than 1.2311 due to its nickel content improving chip formation. Rated 80-85% of 1% carbon steel. * **Polishability:** **Excellent** – The CLC quality and low sulfur content enable high-quality surface finishes (SPI #A2-A3). * **Weldability:** **Good** – Requires preheat (250-350°C) and post-weld stress relief. The nickel content improves weld metal toughness. * **Through-Hardenability:** **Outstanding.** Capable of achieving fully martensitic structure with uniform hardness in sections exceeding 1000mm, a key performance attribute. * **Physical Properties:** * **Density:** 7.85 g/cm³ * **Modulus of Elasticity:** 210 GPa (30.5 × 10⁶ psi) * **Thermal Conductivity:** ~ 35 W/m·K (at 20°C) * **Coefficient of Thermal Expansion:** 11.5 × 10⁻⁶/°C (20–100°C) ## **5. Product Application** CLC 1.2738 is specifically designed for large-scale, high-performance tooling where size and reliability are critical. * **Large Plastic Injection Molds:** * **Massive mold bases and frames** for automotive molds (bumpers, dashboards, body panels). * **Large single-cavity molds** for appliances, bins, pallets, and industrial components. * **Molds for engineering plastics** requiring high clamp pressure. * **Die Casting Tooling:** * **Heavy backing plates, bolster plates, and holder blocks** for aluminum and magnesium die-casting machines. * **Large ejector housings and support structures.** * **General Heavy-Duty Tooling:** * **Large fixtures, jigs, and machine beds** requiring high rigidity and stability. * **Press tools and forming dies** with large footprints. ## **6. Key Features & Advantages of CLC Quality for Thick Sections** * **Unmatched Through-Hardening Capability:** Guarantees uniform hardness and mechanical properties from surface to core in the thickest commercially available blocks, eliminating soft spots. * **Exceptional Toughness:** The nickel addition provides superior impact strength, reducing the risk of catastrophic cracking in large, expensive tools. * **Minimal Distortion Tendency:** Exhibits excellent dimensional stability during machining and in service due to its homogeneous, stress-relieved structure. * **Superior Internal Cleanliness (CLC):** Minimizes the risk of failure initiation at inclusions, which is critically important in large cross-sections where stress concentrations can be significant. * **Excellent Polishability and Texture Transfer:** Capable of high-quality surface finishes required for large automotive and consumer product molds. * **Good Weldability for Large Tool Repairs:** Allows for reliable repair of large molds when necessary. * **Proven Reliability in Massive Applications:** Industry-standard for the largest and most demanding plastic injection molds worldwide. ## **7. Processing Guidelines** * **Machining:** Use sharp carbide tools. The material's good machinability and uniform hardness allow for predictable metal removal rates even in deep cavities. * **Stress Relieving:** For critical, high-precision large molds, a stress relief treatment (500-550°C for 2 hours per 25mm thickness) after rough machining is highly recommended to ensure ultimate dimensional stability. * **Welding:** Preheat to 250-350°C. Use low-hydrogen electrodes (e.g., matching 1.2738 composition or AWS E7018). Post-weld heat treatment at 450-500°C is recommended. * **Electrical Discharge Machining (EDM):** Performs well. A stress relief treatment after rough EDM is advisable. * **Surface Treatment:** Responds well to **nitriding** to increase surface hardness for wear resistance on slides and cores. **Summary:** Industeel CLC 1.2738 represents the pinnacle of prehardened mold steel technology for large-scale tooling applications. Its nickel-alloyed composition, combined with CLC manufacturing quality, delivers the unique combination of deep hardenability, high toughness, and dimensional stability required for massive mold blocks. For mold makers and tool shops producing the world's largest and most critical plastic injection molds and die-casting tooling, CLC 1.2738 provides the reliable, predictable performance necessary to manage risk, ensure tool longevity, and achieve production success with multi-ton tooling investments. It is not merely a material choice but an engineering solution for scale and reliability. -:- For detailed product information, please contact sales. -: Industeel CLC 1.2738 Prehardened Mold Steel (300HB/30HRC) for Thick Sections Specification Dimensions Size： Diameter 20-1000 mm Length <7045 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 1.2738 Prehardened Mold Steel (300HB/30HRC) for Thick Sections Properties -:- For detailed product information, please contact sales. -:

Spherical InduSteel Powder CLC 1.2738 Prehardened Mold Steel Powder (300HB/30HRC) for Thick Sections Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical InduSteel Powder CLC 1.2738 Prehardened Mold Steel Powder (300HB/30HRC) for Thick Sections -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of InduSteel Spherical Powder CLC 1.2738 Prehardened Mold Steel Spherical Powder (300HB/30HRC) for Thick Sections -:- For detailed product information, please contact sales. -: Chemical Identifiers InduSteel Spherical Powder CLC 1.2738 Prehardened Mold Steel Spherical Powder (300HB/30HRC) for Thick Sections -:- For detailed product information, please contact sales. -:

Packing of InduSteel Spherical Powder CLC 1.2738 Prehardened Mold Steel Spherical Powder (300HB/30HRC) for Thick Sections -:- 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 3516 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