1,We Manufacturing processes are primarily classified into four types:
1:Forging,
2:Casting,
3:Cutting,
4:Rolling.
2,We can manufacture in accordance with these standards.
Standards:
GB Series (Chinese Standards), JB Series (Machinery Standards), HG Series (Chemical Industry Standards), ASME B16.5 (American Standards), BS4504 (British Standards), DIN (German Standards), and JIS (Japanese Standards).
Internationally, there are two primary systems of pipe flange standards: the European system, represented by the German DIN standards (including those of the former Soviet Union), and the American system, represented by the US ANSI pipe flange standards. Other common standards include: the Chinese Ministry of Machinery Industry standards (JB series), the Ministry of Chemical Industry standards (HG series), the Chinese National Standard *GB/T 9112–9124-2010 Steel Pipe Flanges*, as well as US standards (ASME B16.5), British standards (BS4504), German standards (DIN), Japanese standards (JIS), and marine standards (CBM), among others.
The nominal pressure ratings for the PN series are designated by "PN" and comprise the following nine levels: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160.
The nominal pressure ratings for the Class series are designated by "Class" and comprise the following six levels: Class150, Class300, Class600, Class900, Class1500, and Class2500.
Flange Classification
1. **According to Chemical Industry Standards:** Flanges are classified as follows:
Plate Flat Welding Flange (PL), Necked Flat Welding Flange (SO), Necked Butt Welding Flange (WN), Integral Flange (IF), Socket Welding Flange (SW), Threaded Flange (Th), Butt Welding Ring Loose Flange (PJ/SE), Blind Flange (BL), Flat Welding Ring Loose Flange (PJ/PJ), and Lined Blind Flange (BL(s)).
2. **According to Petrochemical (SH) Industry Standards:** Flanges are classified as follows:
Threaded Flange (PL), Butt Welding Flange (WN), Flat Welding Flange (SO), Socket Welding Flange (SW), Loose Flange (LJ), and Blind Flange (no specific designation).
3. **According to Machinery (JB) Industry Standards:** Flanges are classified as follows:
Integral Flange, Butt Welding Flange, Plate Flat Welding Flange, Butt Welding Ring Plate Loose Flange, Flat Welding Ring Plate Loose Flange, Lap Joint Ring Plate Loose Flange, and Blind Flange.
4. **According to Connection Method/Type:** Flanges are classified as follows:
Plate Flat Welding Flange, Necked Flat Welding Flange, Necked Butt Welding Flange, Socket Welding Flange, Threaded Flange, Blind Flange, Necked Butt Welding Ring Loose Flange, Flat Welding Ring Loose Flange, Ring-Type Joint (RTJ) Flange and Blind Flange, Large-Diameter Plate Flange, Large-Diameter High-Neck Flange, Figure-8 Blind Plate, Butt Welding Ring Loose Flange, etc.
5. **According to the Component Being Connected:** Flanges can be classified into Vessel Flanges and Pipe Flanges.
6. **According to Structural Type:** Flanges include Integral Flanges, Threaded Flanges, Flat Welding Flanges, Butt Welding Flanges, Lap Joint (Loose/Swivel) Flanges, and Blind Flanges.
A flange—also referred to as a flange plate or rim—is a component used to connect shafts to one another, or, more commonly, to join the ends of pipes. Flanges are also utilized at the inlet and outlet ports of equipment to facilitate connections between two devices—for instance, the flange on a speed reducer. A "flange connection" or "flanged joint" refers to a detachable joint assembly comprising three interconnected elements—a flange, a gasket, and bolts—that together form a sealed structural unit. In the context of piping systems, a "pipe flange" specifically denotes a flange used for plumbing within the installation; when applied to equipment, it refers to the inlet or outlet flange of that specific device. Flanges feature a series of holes through which bolts are inserted to securely fasten the two flanges together, while a gasket placed between the flanges ensures a leak-proof seal. Flanges are broadly categorized into three types: threaded (screw-in) flanges, welded flanges, and clamp-type flanges. Flanges are invariably used in pairs; threaded flanges are suitable for low-pressure piping applications, whereas welded flanges are required for systems operating at pressures exceeding 4 kilograms per square centimeter. A sealing gasket is inserted between the two flange plates, which are then firmly secured using bolts. The thickness of a flange—as well as the specifications of the bolts used to fasten it—vary depending on the specific pressure rating required for the application. When connecting equipment such as water pumps or valves to piping systems, the corresponding connection points on these devices are often manufactured in the shape of a matching flange; this method of attachment is also referred to as a "flange connection." Generally, any connecting component that utilizes bolts to join and seal the perimeters of two flat surfaces—such as the joints in ventilation ducts—is termed a "flange"; such components may collectively be classified as "flange-type parts." However, since such a connection often constitutes merely a *portion* of a larger device—for instance, the interface between a flange and a water pump—it would be inappropriate to classify the entire water pump itself as a "flange-type part." Conversely, smaller components—such as valves—that feature such flanged interfaces may indeed be appropriately categorized as "flange-type parts."
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InduSteel Flange Superplast® 350 Mold Steel Flange Product Information
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InduSteel Flange Superplast® 350 Mold Steel Flange Synonyms
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Industeel Superplast® 350 Mold Steel Product Information
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# **Product Introduction: Industeel Superplast® 350 Mold Steel**
## **1. Overview**
**Industeel Superplast® 350** is a premium-grade **prehardened, through-hardening chromium-molybdenum alloy steel** designed as a versatile, high-performance material for plastic injection molds and general tooling applications. Supplied in a **quenched and tempered (prehardened) condition** with a guaranteed hardness of approximately **350 HB (36-38 HRC)**, it occupies a strategic position between standard P20-type steels (300 HB) and higher-hardness specialty grades. Superplast® 350 offers an optimal balance of **enhanced wear resistance, good toughness, excellent machinability, and superior polishability**, making it an ideal choice for medium-to-large production molds requiring extended service life, high-quality surface finishes, and reliable performance with engineering plastics and abrasive compounds.
## **2. International Standards & Specifications**
Superplast® 350 is a proprietary grade engineered to deliver consistent performance beyond standard prehardened mold steel classifications.
* **Primary Manufacturer Standard:**
* **Industeel Superplast® 350:** Proprietary specification defining this intermediate-hardness prehardened mold steel.
* **Material Classification & Comparative Grades:**
* **Type:** **Enhanced Prehardened Chromium-Molybdenum Alloy Steel** (P20+/H11 Modified Type).
* **Performance Benchmark:** Bridges the gap between standard **DIN 1.2311/1.2738 (~300 HB)** and high-hardness grades like **Superplast® 400 (~400 HB)** or prehardened H13 variants. Offers a 15-20% increase in yield strength over standard P20.
* **International Equivalents (Conceptual Similarity):**
* **Premium P20+Ni at Elevated Hardness:** Certain high-quality 1.2738 grades can be supplied at ~350 HB.
* **Modified H11/H13 Prehardened:** Some manufacturers offer hot work steel derivatives in prehardened conditions at similar hardness.
* **Proprietary Intermediate Grades:** Such as **Uddeholm IMPAX Hi-Hard** or similar performance-tier steels.
* **ISO 4957:** Would fall under alloy steel classifications (e.g., 35CrMo2 modified) but represents a specialized composition and heat treatment.
## **3. Chemical Composition (Weight %, Typical)**
The composition is optimized for increased hardenability and tempering resistance while maintaining excellent machinability.
| Element | Typical Range (%) | Role & Benefit |
|---------|------------------|----------------|
| **Carbon (C)** | 0.35 – 0.42 | Provides core strength and hardness. Slightly elevated compared to standard P20 to achieve the target 350 HB hardness while maintaining good toughness. |
| **Chromium (Cr)** | 1.80 – 2.10 | Enhances hardenability for uniform through-thickness properties and provides mild wear/corrosion resistance. |
| **Molybdenum (Mo)** | 0.30 – 0.50 | **Increased content** (vs. standard P20). Critical for achieving higher hardenability, improving toughness, and enhancing tempering resistance. |
| **Vanadium (V)** | 0.05 – 0.15 | Added for grain refinement and to contribute to secondary hardening, improving wear resistance. |
| **Nickel (Ni)** | 0.70 – 1.10 (May be present) | Often included to significantly enhance **core toughness and impact strength** at the elevated hardness level, a key performance feature. |
| **Manganese (Mn)** | 1.20 – 1.60 | Aids in hardenability and strength. |
| **Silicon (Si)** | 0.20 – 0.40 | Deoxidizer and solid solution strengthener. |
| **Sulfur (S)** | ≤ 0.005 (Ultra-Low) | Kept extremely low to ensure excellent **weldability, polishability, and isotropic toughness**. |
## **4. Typical Physical & Mechanical Properties (As Prehardened)**
* **Delivery Condition:** Quenched and tempered at the mill, ready for machining.
* **Guaranteed Hardness:** **340 – 370 HB (36 – 39 HRC)** – Uniform throughout large cross-sections (typically up to 1000mm thickness).
* **Tensile Strength:** 1150 – 1300 MPa (167,000 – 188,000 psi)
* **Yield Strength (0.2% Offset):** 1000 – 1150 MPa (145,000 – 167,000 psi) – **Approximately 20% higher than standard 300 HB P20.**
* **Elongation:** ≥ 10% (in 50mm)
* **Impact Toughness (Charpy V-Notch):** **≥ 25 J (18 ft-lb) at room temperature** – **Very good for its hardness level**, a direct benefit of the optimized alloy design (e.g., potential Ni addition).
* **Machinability:** **Very Good.** More demanding than 300 HB steels but offers excellent machinability for its hardness. Requires sharp carbide tools and appropriate parameters. Rated ~70-75% of 1% carbon steel.
* **Polishability:** **Excellent.** The ultra-low sulfur content and homogeneous microstructure enable the achievement of high surface finishes (SPI #A2-A3) and good texture replication.
* **Weldability:** **Good.** Requires standard procedures for prehardened steels: preheat (300-350°C), low-hydrogen electrodes, and post-weld stress relief. More forgiving than 400 HB grades.
* **Dimensional Stability:** **Excellent.** Exhibits minimal distortion during machining due to its stable, tempered martensitic structure.
* **Physical Properties:**
* **Density:** 7.85 g/cm³
* **Modulus of Elasticity:** 210 GPa (30.5 × 10⁶ psi)
* **Thermal Conductivity:** ~ 34 W/m·K (at 20°C)
* **Coefficient of Thermal Expansion:** 11.5 × 10⁻⁶/°C (20–100°C)
## **5. Product Application**
Superplast® 350 is selected for applications where a significant upgrade in wear resistance and strength over standard P20 is needed, without the machining challenges of very high hardness steels.
* **High-Volume Plastic Injection Molds:**
* **Molds for engineering plastics** (PA, POM, PC, PBT) and **mildly abrasive filled materials** (low-percentage glass or mineral fill).
* **Automotive interior and exterior components** requiring durability over long production runs.
* **Technical parts and consumer goods molds** where extended tool life reduces cost per part.
* **Die Casting Tooling:**
* **Ejector plates, support pillars, and holder blocks** requiring higher strength.
* **Inserts and cores** for zinc die casting.
* **Hot Runner Systems:**
* **Manifold plates and support components.**
* **General Precision Tooling:**
* **Jigs, fixtures, and machine components** subjected to higher mechanical loads.
* **Wear plates and guide rails.**
## **6. Key Features & Advantages**
* **Enhanced Wear Resistance & Strength:** The 350 HB hardness provides a tangible increase in service life over 300 HB steels for many applications, particularly with engineering and abrasive plastics.
* **Optimal Balance of Properties:** Offers the best compromise between improved wear resistance, good machinability, high toughness, and excellent polishability in the prehardened mold steel range.
* **Eliminates Secondary Heat Treatment:** Removes the cost, lead time, and risk of distortion associated with through-hardening.
* **Excellent Toughness at Elevated Hardness:** Maintains good impact resistance, reducing the risk of chipping and catastrophic failure in large, complex molds.
* **Superior Dimensional Stability:** The stress-relieved, prehardened condition ensures minimal movement during and after machining.
* **Good Weldability and Repairability:** Allows for reliable mold modifications and repairs using established procedures.
* **Good Nitriding Response:** Can be surface hardened via nitriding to further increase surface hardness for specific high-wear areas.
## **7. Processing Guidelines**
* **Machining:** Use sharp carbide tools. Slightly reduce cutting speeds and feeds compared to machining 300 HB steels. Use adequate coolant.
* **Electrical Discharge Machining (EDM):** Performs well. A stress-relief temper (180-200°C) after roughing is recommended for highest precision work.
* **Grinding:** Use appropriate wheels (aluminum oxide). Standard practices apply.
* **Welding:** Preheat to 300-350°C. Use low-hydrogen electrodes (e.g., AWS E7018 or matching filler). Post-weld heat treatment at 450-500°C is recommended for critical applications.
* **Stress Relieving:** For the most critical, high-precision molds, a final stress relief at 500-550°C after machining may be beneficial.
**Summary:**
Industeel Superplast® 350 represents a strategically important tier in the mold steel performance hierarchy. It is engineered for mold makers and manufacturers who have identified that standard P20-type steels are nearing their performance limits but wish to avoid the complexities and costs associated with through-hardening or very high hardness prehardened steels. By delivering a 15-20% increase in mechanical strength with minimal compromise on machinability and toughness, Superplast® 350 provides a cost-effective, low-risk path to significantly extended mold life and improved reliability in demanding production environments. It is the intelligent upgrade for applications where more performance is needed, but "maximum" performance is not required.
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Industeel Superplast® 350 Mold Steel Specification
Dimensions
Size：
Diameter 20-1000 mm Length <7049 mm
Size:We can customized as required
Standard：
Per your request or drawing
We can customized as required
Properties（Theoretical）
Chemical Composition
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Industeel Superplast® 350 Mold Steel Properties
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Applications of InduSteel Flange Superplast® 350 Mold Steel Flange
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Chemical Identifiers InduSteel Flange Superplast® 350 Mold Steel Flange
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Packing of InduSteel Flange Superplast® 350 Mold Steel Flange
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Standard Packing:
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Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Flange 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 3520 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
