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 CLC 1.2738 Prehardened Mold Steel Flange (300HB/30HRC) for Thick Sections Product Information
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InduSteel Flange CLC 1.2738 Prehardened Mold Steel Flange (300HB/30HRC) for Thick Sections Synonyms
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Industeel CLC 1.2738 Prehardened Mold Steel (300HB/30HRC) for Thick Sections Product Information
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# **Industeel CLC 1.2738 Prehardened Mold Steel (300 HB / 30 HRC) for Thick Sections**
## **Product Overview**
Industeel CLC 1.2738 is a premium-grade, nickel-chromium-molybdenum alloyed mold steel specifically engineered and heat-treated for applications requiring **exceptional through-hardness uniformity in thick cross-sections**. Supplied in a prehardened and tempered condition at approximately 300 HB (30 HRC), this grade offers outstanding hardenability that ensures minimal hardness drop from surface to core, even in very large block sizes. It combines high core strength with good toughness and machinability, making it the material of choice for heavy-duty plastic molds and large forming tools where dimensional stability under load is paramount.
## **Key Features & Benefits**
* **Superior Through-Hardenability:** The core advantage of CLC 1.2738 is its excellent hardenability, guaranteed by a carefully balanced high-nickel alloy design. This ensures a uniform hardness profile (typically ≤ 30 HB points variation) throughout the entire thickness of massive components, preventing soft cores that can lead to indentation or failure.
* **Optimized for Thick Sections:** Specifically processed to deliver guaranteed mechanical properties in **large dimensions** (e.g., blocks exceeding 1000mm thickness), where standard prehardened steels would exhibit significant core softening.
* **High Core Strength & Toughness:** The nickel-alloyed microstructure provides an excellent combination of tensile strength and impact toughness in the prehardened state, essential for withstanding high clamping forces and intermittent loads in large molds.
* **Good Machinability & Polishability:** Despite its high hardenability, it maintains good machinability in the 300 HB condition and can be polished to high surface finishes (SPI-SPE A2/A3), suitable for visible plastic parts.
* **Minimized Distortion Risk:** Supplied ready-to-machine, it eliminates the risks of distortion, cracking, and size changes associated with the quenching of large, complex parts in a workshop heat treatment.
## **Typical Applications**
Industeel CLC 1.2738 is the preferred material for large-scale, high-performance tooling:
* **Very Large Plastic Injection Molds:** For automotive body panels, bumpers, dashboards, appliance housings, and pallets.
* **Thick-Walled Mold Bases & Support Plates:** Where consistent hardness and rigidity across the entire cross-section are critical to prevent deflection.
* **Compression & Transfer Molds:** For rubber and composite materials.
* **Large Die Casting Dies:** For aluminum and magnesium, particularly for structural components.
* **Forming Tools & Press Brake Dies:** For sheet metal forming.
## **International Standards & Designations**
| Region/Standard | Standard Designation | Common Name / Equivalent |
| :--- | :--- | :--- |
| **EUR (EN)** | **1.2738** (42CrMoNiV7-6) | Proprietary "CLC" version with guaranteed through-hardening. |
| **Germany (W-Nr.)** | **1.2738** | |
| **USA (AISI/ASTM)** | **P20+X / P20+Ni** (Modified P20 with added Nickel) | Often called "P20 Plus" or directly by DIN 1.2738. |
| **USA (UNS)** | **K21020** (Modified) | |
| **Japan (JIS)** | **PX88** | Equivalent high-hardenability P20 type. |
| **Sweden (SS)** | **718 HH** (Heavy Hardening) | Refers to high-hardenability variants of 718. |
*Note: "CLC" is Industeel's proprietary brand, indicating controlled ladle chemistry and specialized heat treatment cycles to achieve the guaranteed through-hardening properties in thick sections.*
## **Chemical Composition (Typical %)**
The high Nickel and Molybdenum content is key to its deep-hardening properties.
| Element | Content (%) | Role |
| :--- | :--- | :--- |
| **Carbon (C)** | 0.40 - 0.45 | Provides base hardness and strength. |
| **Silicon (Si)** | 0.20 - 0.40 | Deoxidizer, strengthens ferrite. |
| **Manganese (Mn)** | 1.40 - 1.60 | Increases hardenability and strength. |
| **Chromium (Cr)** | 1.80 - 2.00 | Improves hardenability, wear, and corrosion resistance. |
| **Molybdenum (Mo)** | 0.15 - 0.25 | Enhances hardenability, strength at high tempering temperatures, and toughness. |
| **Nickel (Ni)** | **0.90 - 1.10** | **The key element for superior hardenability and core toughness.** |
| **Sulfur (S)** | ≤ 0.005 | Very low for better polishability and weldability. |
| **Phosphorus (P)** | ≤ 0.015 | Very low for improved toughness. |
## **Physical & Mechanical Properties**
* **Delivery Hardness:** **290 - 330 HB** (approx. **30 - 34 HRC**). Typically targeted at **300 HB**.
* **Through-Hardening Guarantee:** Hardness uniformity is guaranteed per specification, e.g., max. 30 HB difference between surface and core in qualified thick sections (e.g., > 500mm).
* **Tensile Strength:** ~1000 - 1150 MPa
* **Yield Strength (0.2% offset):** ~800 - 950 MPa
* **Elongation at Break:** ~10 - 14%
* **Reduction of Area:** ~35 - 45%
* **Impact Toughness (Charpy V, longitudinal):** Typically **≥ 25 J** at room temperature, reflecting its good toughness.
* **Thermal Conductivity:** ~35 W/m·K (at 20°C)
* **Coefficient of Thermal Expansion:** ~12.3 x 10⁻⁶ /K (20-100°C)
## **Processing Guidelines**
* **Machining:** Machine in the prehardened state. Use robust setups and sharp tools with positive geometries. Recommended cutting speeds are similar to other 300 HB prehardened steels. Its uniformity allows for predictable machining behavior throughout the part.
* **Welding:** Preheating to **300-350°C** is **mandatory** due to the alloy content and prehardened condition. Use low-hydrogen electrodes (e.g., AWS A5.5 E10018-D3 or similar). Post-weld tempering at **500-550°C** is strongly recommended to relieve stresses, especially in critical applications.
* **Stress Relieving:** For complex and heavily machined large blocks, intermediate stress relieving at **550-600°C** can be performed to ensure dimensional stability.
* **Nitriding:** Excellent candidate for gas or plasma nitriding to significantly increase surface hardness (> 1000 HV) and wear resistance without affecting the core properties.
## **Summary**
**Industeel CLC 1.2738** is the definitive solution for **large, thick-walled mold and die applications** where guaranteed through-hardness and core properties cannot be compromised. Its superior hardenability, derived from a optimized nickel-alloyed chemistry and specialized processing, ensures performance uniformity in massive sections that standard P20/1.2312 grades cannot reliably achieve. It delivers the strength, toughness, and stability required for the most demanding large-format tooling projects.
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Industeel CLC 1.2738 Prehardened Mold Steel (300HB/30HRC) for Thick Sections Specification
Dimensions
Size：
Diameter 20-1000 mm Length <5244 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 CLC 1.2738 Prehardened Mold Steel (300HB/30HRC) for Thick Sections Properties
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Applications of InduSteel Flange CLC 1.2738 Prehardened Mold Steel Flange (300HB/30HRC) for Thick Sections
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Chemical Identifiers InduSteel Flange CLC 1.2738 Prehardened Mold Steel Flange (300HB/30HRC) for Thick Sections
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Packing of InduSteel Flange CLC 1.2738 Prehardened Mold Steel Flange (300HB/30HRC) for Thick Sections
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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 1715 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
