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 1.2312 Prehardened Mold Steel Flange (300HB/32HRC) with Improved Machinability Product Information
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InduSteel Flange CLC 1.2312 Prehardened Mold Steel Flange (300HB/32HRC) with Improved Machinability Synonyms
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Industeel CLC 1.2312 Prehardened Mold Steel (300HB/32HRC) with Improved Machinability Product Information
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**Industeel CLC 1.2312 Prehardened Mold Steel (300 HB / 32 HRC) with Improved Machinability**
### **Product Overview**
Industeel CLC 1.2312 is a premium-grade, chromium-molybdenum alloyed mold steel supplied in a prehardened and tempered condition. Its primary defining characteristics are a guaranteed uniform hardness of approximately 300 HB (32 HRC) throughout the entire section and significantly enhanced machinability compared to standard prehardened steels. This combination makes it an ideal choice for manufacturing large, complex plastic molds and die-casting tooling where excellent machining performance, good polishability, and reliable through-hardness are critical for productivity and dimensional stability.
### **Key Features & Benefits**
* **Improved Machinability:** Specially treated to offer superior machinability in its prehardened state. This allows for faster machining speeds, reduced tool wear, longer tool life, and better surface finish during milling, drilling, and turning, leading to shorter manufacturing cycles and lower production costs.
* **Uniform Prehardened Condition:** Supplied at a consistent hardness of ~300 HB (32 HRC), eliminating the need for subsequent heat treatment (quenching and tempering) for many applications. This prevents risks of distortion, cracking, and size change associated with post-machining heat treatment.
* **Excellent Polishability & Texture Transfer:** Possesses a homogeneous, fine-grained structure that allows it to be polished to very high surface finishes (e.g., SPI-SPE A1/A2) and is well-suited for photo-etching and texturing processes commonly used in plastic injection molds.
* **Good Wear Resistance & Toughness:** The balanced alloy composition and prehardened condition provide a good compromise between resistance to abrasion (from filled plastics or mild erosive wear) and toughness to withstand operational stresses.
* **Good Dimensional Stability:** The through-hardening and stable tempered structure ensure minimal dimensional changes during tool manufacturing and in service under moderate thermal and mechanical loads.
### **Typical Applications**
Industeel CLC 1.2312 is primarily used in the manufacture of:
* **Large & Medium Plastic Injection Molds:** For automotive components, household appliances, electronic housings, and general industrial parts.
* **Mold Bases & Inserts:** As a standard material for high-quality mold plates and core/cavity inserts requiring stable prehardened properties.
* **Die Casting Tooling:** For non-ferrous metals (aluminum, zinc, magnesium) for components like housings, brackets, and covers, where improved machinability is a major advantage.
* **Compression Molds and Forming Tools.**
### **International Standards & Designations**
Industeel CLC 1.2312 corresponds to the following international standard grades:
| Region/Standard | Standard Designation | Similar/Equivalent Grade |
| :--- | :--- | :--- |
| **EUR (EN)** | **1.2312** (40CrMnNiMo8-6-4) | Designation slightly modified for proprietary version. |
| **Germany (W-Nr.)** | **1.2312** | |
| **USA (AISI/ASTM)** | **P20 Modified** (with improved machinability) | Often referred to as "P20+" or "P20 Enhanced." |
| **USA (UNS)** | **T51620** | For general P20-type steels. |
| **Japan (JIS)** | **PX5** (Modified) | |
| **Sweden (SS)** | **718 (Modified)** | Refers to enhanced machinability versions of IMPAX/718 type. |
*Note: "CLC" is Industeel's proprietary brand designation, indicating specific melting and processing routes that deliver the improved properties.*
### **Chemical Composition (Typical %)**
The composition is optimized for prehardening, machinability, and polishability.
| Element | Content (%) | Element | Content (%) |
| :--- | :--- | :--- | :--- |
| **Carbon (C)** | 0.35 - 0.40 | **Molybdenum (Mo)** | 0.15 - 0.25 |
| **Silicon (Si)** | 0.20 - 0.40 | **Nickel (Ni)** | 0.90 - 1.10 |
| **Manganese (Mn)** | 1.40 - 1.60 | **Sulfur (S)** | **< 0.005** (Very Low) |
| **Chromium (Cr)** | 1.80 - 2.00 | **Phosphorus (P)** | **< 0.015** (Very Low) |
**Key to Machinability:** The very low sulfur (S) and phosphorus (P) content is a deliberate metallurgical choice. Unlike free-machining steels that use high sulfur, this "clean steel" approach minimizes the formation of non-metallic inclusions (MnS stringers), which are detrimental to polishability, etching uniformity, and weldability. The improved machinability in CLC 1.2312 is achieved through precise control of microstructure and hardening, not through high-sulfur additives.
### **Physical & Mechanical Properties**
* **Delivery Hardness:** **300 - 330 HB** (approx. **31 - 34 HRC**). Typically guaranteed at **300 HB min**.
* **Tensile Strength:** ~1000 - 1100 MPa
* **Yield Strength (0.2% offset):** ~800 - 900 MPa
* **Elongation at Break:** ~12 - 15%
* **Reduction of Area:** ~35 - 45%
* **Impact Toughness (Charpy V, longitudinal):** Typically > 20 J at room temperature.
* **Thermal Conductivity:** ~36 W/m·K (at 20°C)
* **Coefficient of Thermal Expansion:** ~12.5 x 10⁻⁶ /K (20-100°C)
### **Processing Guidelines**
* **Machining:** Perform in the prehardened state. Due to its enhanced machinability, higher cutting speeds and feed rates than for standard 300 HB steels can often be used. Always use sharp tools with positive rake angles and adequate cooling.
* **Welding:** Possible with proper precautions. Preheating to 250-300°C is recommended. Use low-hydrogen electrodes or filler wires with matching or slightly lower carbon content (e.g., AWS A5.28 ER80S-D2). Post-weld tempering at 400-500°C is advisable for critical applications to relieve stresses.
* **Stress Relieving:** If extensive machining is performed on large blocks, stress relieving at 500-550°C followed by slow cooling can help maintain dimensional stability.
* **Nitriding & Surface Treatments:** Well-suited for nitriding (gas, plasma) to further enhance surface hardness and wear resistance without significant core property changes.
In summary, **Industeel CLC 1.2312** represents an advanced evolution of the classic P20/1.2312 grade, where proprietary processing delivers exceptional machinability without compromising the polishability, weldability, and through-hardness consistency required for high-performance, large-format mold making.
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Industeel CLC 1.2312 Prehardened Mold Steel (300HB/32HRC) with Improved Machinability Specification
Dimensions
Size：
Diameter 20-1000 mm Length <5243 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 1.2312 Prehardened Mold Steel (300HB/32HRC) with Improved Machinability Properties
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For detailed product information, please contact sales.
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Applications of InduSteel Flange CLC 1.2312 Prehardened Mold Steel Flange (300HB/32HRC) with Improved Machinability
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Chemical Identifiers InduSteel Flange CLC 1.2312 Prehardened Mold Steel Flange (300HB/32HRC) with Improved Machinability
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Packing of InduSteel Flange CLC 1.2312 Prehardened Mold Steel Flange (300HB/32HRC) with Improved Machinability
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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 1714 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
