International Mold Steel Rod/Bar,Superplast® Stainless Plastic and Rubber Mold Steel Rod/Bar

International Mold Steel Rod Superplast® Stainless Plastic and Rubber Mold Steel Rod Product Information -:- For detailed product information, please contact sales. -: International Mold Steel Rod Superplast® Stainless Plastic and Rubber Mold Steel Rod Synonyms -:- For detailed product information, please contact sales. -:

International Mold Steel Superplast® Stainless Plastic and Rubber Mold Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: Superplast® Stainless Steel for Plastic and Rubber Molds** ## **1. Overview** **Superplast®** is a proprietary, **premium-grade, martensitic stainless mold steel** engineered specifically for the most demanding plastic injection, compression, and rubber molding applications. As an **Electro-Slag Remelted (ESR) steel**, it delivers exceptional **microstructural cleanliness, isotropic properties, and superior polishability**. This steel is formulated to provide an optimal balance of **high corrosion resistance, excellent machinability in the pre-hardened state, and outstanding wear performance after heat treatment**. Superplast® is designed as a versatile, high-performance solution for mold makers requiring a single material that excels in both general-purpose and high-wear applications, particularly where surface finish, dimensional stability, and resistance to corrosive processing environments are critical. ## **2. International Standards & Specifications** Superplast® is a proprietary grade that typically meets or exceeds the requirements of several key international stainless mold steel standards. * **Primary Manufacturer Standard:** * **International Mold Steel (IMS) Superplast®:** The proprietary specification defining its enhanced properties. * **Key International Benchmarks & Equivalents:** * **DIN 1.2085 / 1.2316 (Enhanced):** Combines the high polishability and corrosion resistance of 1.2085 (420-type) with the higher hardness capability and modified chemistry similar to 1.2316 (a corrosion-resistant P20+ type). * **AISI 420 Modified / P20+Stainless:** A hybrid-type stainless steel offering performance between standard 420 stainless and modified P20 grades. * **JIS SUS420J2 Modified:** An enhanced version of the Japanese stainless mold steel. * **Common Industry Grades:** Comparable in performance to other premium-branded stainless mold steels such as **Stavax ESR (Uddeholm)**, **M300 ESR (Böhler)**, or **Moldmax® (Carpenter)**. * **ISO 4957 X36CrMo17:** A potential classification for steels with similar Cr and Mo content. ## **3. Chemical Composition (Weight %, Typical)** The chemistry is carefully balanced to enhance corrosion resistance, hardenability, and polishability beyond standard grades. | Element | Typical Range (%) | Role & Benefit | | :--- | :--- | :--- | | **Carbon (C)** | 0.33 – 0.43 | Provides core hardness and wear resistance. Optimized for a good balance between toughness and hardenability. | | **Chromium (Cr)** | 15.50 – 17.50 | **High chromium content** ensures **superior corrosion resistance**, significantly better than standard P20 or 420 (13% Cr) grades. Forms a robust passive layer. | | **Molybdenum (Mo)** | 0.80 – 1.40 | **Critical addition.** Enhances corrosion resistance (especially against pitting), increases hardenability for more uniform properties in thick sections, and improves toughness. | | **Vanadium (V)** | ≤ 0.10 | Added in small amounts for grain refinement. | | **Manganese (Mn)** | 0.50 – 1.00 | Aids in hardenability and hot workability. | | **Silicon (Si)** | 0.30 – 0.60 | Deoxidizer, improves strength and fluidity. | | **Nickel (Ni)** | (May be present, ~1.0) | Sometimes added to improve toughness and further enhance corrosion resistance. | | **Sulfur (S)** | **≤ 0.003 (Very Low)** | Kept extremely low to ensure **excellent polishability and weldability**, and to maintain good transverse toughness. | ## **4. Typical Physical & Mechanical Properties** * **Standard Delivery Condition:** **Pre-hardened and tempered** to approximately **30-34 HRC (290-330 HB)**, optimized for excellent machinability and ready for mold fabrication. * **Properties in Pre-Hardened State (30-34 HRC):** * **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% * **Machinability:** **Excellent** for its hardness level, a key feature of this grade. * **Properties After Final Hardening (Optional for High-Wear Areas):** * **Austenitizing:** 1020-1050°C (1868-1922°F), oil or air quench. * **Tempering:** 180-250°C (for high hardness) or 400-550°C (for high toughness). * **Achievable Hardness:** **50 – 56 HRC** (depending on tempering temperature). * **Wear Resistance:** Very good in the hardened state, suitable for abrasive plastics or high-volume production. * **Physical Properties:** * **Density:** ~7.78 g/cm³ * **Thermal Conductivity:** ~ 25 W/m·K (at 20°C) * **Coefficient of Thermal Expansion:** ~ 10.8 x 10⁻⁶/K (20-100°C) * **Corrosion Resistance:** **Excellent.** The high Cr and Mo content provides superior resistance to rust from cooling water, humidity, and acidic by-products from plastics (PVC, flame-retardants, acetals) and rubber compounds. * **Key Performance Features:** * **Polishability:** **Very Good to Excellent.** Capable of achieving high-gloss finishes (SPI #A2-A1) due to its homogeneous ESR structure and low sulfur content. * **Texture Transfer:** Excellent for etching fine, detailed textures. ## **5. Product Application** Superplast® is designed as a versatile, high-end material for a broad spectrum of molding applications where corrosion is a concern. * **Plastic Injection Molds:** * **Molds for Corrosive Plastics:** PVC, flame-retardant (FR) compounds, polyacetals, and other acid-releasing materials. * **Medical and Food-Grade Molds:** Where hygiene, cleanability, and corrosion resistance are mandatory. * **High-Gloss Consumer Product Molds:** For automotive interiors, electronics housings, and cosmetic packaging. * **General-Precision Molds:** Where the combination of machinability and corrosion resistance reduces risk and lead time. * **Rubber Molding (Compression, Transfer, Injection):** * **Molds for Technical Rubber Components:** Seals, gaskets, diaphragms. * **Tire Mold Segments and Inserts.** * Resists corrosion from rubber release agents and curing by-products. * **Other Applications:** * **Die Casting:** Ejector pins, cores, and inserts for zinc/aluminum where coolant corrosion is an issue. * **Hot Runner System Components** requiring corrosion resistance. ## **6. Key Features & Advantages** * **Superior Corrosion Resistance:** The high Chromium (15.5-17.5%) and Molybdenum content provide best-in-class protection against rust and chemical attack in molding environments, extending mold life and reducing maintenance. * **Excellent Machinability in Pre-Hardened State:** A primary selling point. Allows for faster, easier machining with better surface finishes and longer tool life compared to many other pre-hardened stainless grades. * **High Hardness Capability:** Can be through-hardened to 50-56 HRC for applications requiring extreme wear resistance, offering greater flexibility than steels with lower maximum hardness. * **Exceptional Polishability and Texture Etching:** The clean, homogeneous ESR structure ensures flawless surface finishes and perfect replication of fine textures. * **Good Dimensional Stability:** Exhibits minimal distortion during machining and, if applied, during final heat treatment due to its uniform properties. * **Weldability and Repairability:** Can be welded using appropriate stainless filler metals and procedures, with good results. * **Nitriding Suitability:** Responds well to surface hardening treatments like nitriding to further enhance wear resistance on selected areas (e.g., cores, ejectors). **Summary:** International Mold Steel Superplast® represents a versatile, high-performance stainless mold steel engineered to solve multiple challenges in plastic and rubber molding. By offering superior corrosion resistance, exceptional machinability in its delivery state, and the optional capability for high final hardness, it provides mold makers with a "one-stop" solution that reduces material selection complexity. For applications ranging from corrosive plastic processing to high-volume rubber molding, Superplast® delivers a robust combination of durability, surface quality, and manufacturing efficiency. -:- For detailed product information, please contact sales. -: International Mold Steel Superplast® Stainless Plastic and Rubber Mold Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7031 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. -: International Mold Steel Superplast® Stainless Plastic and Rubber Mold Steel Properties -:- For detailed product information, please contact sales. -:

Applications of International Mold Steel Rod Superplast® Stainless Plastic and Rubber Mold Steel Rod -:- For detailed product information, please contact sales. -: Chemical Identifiers International Mold Steel Rod Superplast® Stainless Plastic and Rubber Mold Steel Rod -:- For detailed product information, please contact sales. -:

Packing of International Mold Steel Rod Superplast® Stainless Plastic and Rubber Mold Steel Rod -:- 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 Rod 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 3502 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