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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MetalTek FERRALIUM® 225 UNS J32550 Duplex Stainless Steel Flange Product Information
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MetalTek FERRALIUM® 225 UNS J32550 Duplex Stainless Steel Flange Synonyms
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MetalTek FERRALIUM® 225 UNS J32550 Duplex Stainless Steel Product Information
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**Product Name:** MetalTek FERRALIUM® 225 Cast Duplex Stainless Steel (UNS J32550)
**Introduction:**
MetalTek FERRALIUM® 225 (UNS J32550) is a **premium, copper-containing duplex stainless steel** that has established a long-standing reputation for **exceptional wear and galling resistance combined with excellent corrosion performance**. As a cornerstone of the FERRALIUM® alloy family, it was specifically engineered to address severe friction and wear conditions in corrosive environments where standard stainless steels fail. Its unique composition, which includes deliberate additions of copper, provides **outstanding resistance to galling, seizing, and erosion-corrosion**, making it an unparalleled choice for moving components in pumps, valves, and marine equipment.
**Key Features:**
* **Superior Galling & Wear Resistance:** The microstructure, enhanced by copper precipitates, provides exceptional resistance to adhesive wear, galling, and seizing in metal-to-metal contact applications.
* **Excellent General & Localized Corrosion Resistance:** Offers strong resistance to stress corrosion cracking (SCC), pitting, and crevice corrosion, particularly in seawater, chlorides, and sulfuric acid environments.
* **High Mechanical Strength:** Delivers yield and tensile strength significantly higher than standard austenitic stainless steel castings (e.g., CF-8M), allowing for robust component design.
* **Proven Performance in Seawater:** A historic and trusted material for marine and offshore applications due to its reliable performance in flowing seawater.
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**1. Chemical Composition (Typical Weight %)**
The composition is uniquely balanced with copper to achieve its signature wear properties.
| Element | Content (%) | Element | Content (%) |
| :------------- | :------------ | :------------- | :---------- |
| Chromium (Cr) | 24.0 - 27.0 | Nickel (Ni) | 4.5 - 6.5 |
| Molybdenum (Mo)| 2.0 - 3.0 | **Copper (Cu)**| **1.50 - 2.50** |
| Manganese (Mn) | ≤ 1.5 | Nitrogen (N) | ≤ 0.25* |
| Silicon (Si) | ≤ 1.00 | Carbon (C) | ≤ 0.06 |
| Phosphorus (P) | ≤ 0.040 | Sulfur (S) | ≤ 0.040 |
| **Iron (Fe)** | **Balance** | | |
**\*Note:** Nitrogen control is modern practice for enhanced properties. Early specifications focused on Cr, Ni, Mo, and Cu.
**Key Alloying Note:** The **copper (Cu) content** is the defining characteristic, forming precipitates that significantly improve anti-galling properties.
**PREN Calculation:** PREN ≈ %Cr + 3.3(%Mo) + 16(%N) ≈ **32 - 36**
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**2. Physical & Mechanical Properties (Typical - Heat Treated Condition)**
| Property | Value / Range |
| :-------------------------------------------- | :-------------------------------- |
| Density | 7.7 g/cm³ |
| Melting Range | ~1350 - 1430 °C |
| Modulus of Elasticity | ~200 GPa |
| **Tensile Strength (Rm)** | **720 - 860 MPa** |
| **Yield Strength (Rp0.2)** | **≥ 520 MPa** |
| **Elongation (A in 50mm)** | **≥ 18 %** |
| Hardness (Brinell) | 260 - 320 HBW |
| **Impact Toughness (Charpy V-notch)** | **≥ 60 J at -30°C** |
| **Galling Resistance** | **Exceptionally High** |
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**3. Product Forms & Applications**
**Available Product Forms:**
* **Static and Shell Molded Sand Castings**
* **Centrifugally Cast Pipes, Liners, and Rings**
* **Investment Castings**
* **Finished Machined Components (especially wear parts)**
**Iconic Applications:**
FERRALIUM® 225 is legendary for specific demanding services:
* **Marine & Offshore:** Propeller shafts, stern tubes, seawater pump wear rings, bushings, bearings, and valve trim in naval and commercial vessels.
* **Pumps (All Industries):** Wear rings, bushings, impellers, and shaft sleeves in pumps handling seawater, brines, slurries, and corrosive fluids.
* **Valves:** Trim components (seats, gates, stems) in valves for corrosive and abrasive services where galling is a concern.
* **Chemical Processing:** Agitators, mixer shafts, and bearing surfaces in sulfuric acid and other corrosive services.
* **Power Generation:** Circulating water pump components and fittings in coastal power stations.
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**4. International Standards & Approvals**
FERRALIUM® 225 is a long-established proprietary alloy with recognized standard equivalents.
| Standard Type | Standard Number & Designation | Notes |
| :------------------ | :--------------------------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------- |
| **Unified Numbering System (UNS)** | **J32550** | The standard UNS designation for this copper-bearing cast duplex alloy. |
| **ASTM (USA)** | **ASTM A890/A890M** | Historically supplied as **Grade 1B (CD4MCu)**. This is the most common standard specification. |
| | **ASTM A487** - Can be supplied to appropriate duplex grade requirements. | |
| **U.K. / British Standards** | Historically conformed to **BS 3468: S142**. | Its origins are closely tied to British aerospace and marine standards. |
| **NACE MR0175/ISO 15156** | **Can be compliant** with appropriate heat treatment and hardness control. | Requires review of specific heat treatment and final hardness. |
| **ASME Boiler & Pressure Vessel Code** | Can be supplied under **SA-351** or **SA-487** for pressure parts, meeting the requirements of the equivalent ASTM specification. | |
| **Key Procurement Specification** | **MetalTek FERRALIUM® 225 Technical Datasheet** alongside **ASTM A890 Grade 1B (CD4MCu)**. | The FERRALIUM® name and MetalTek datasheet guarantee the unique copper-bearing composition and wear properties. |
**Critical Foundry & Fabrication Note:**
FERRALIUM® 225 is a **specialist wear-resistant cast alloy**. To achieve its optimal combination of corrosion resistance and wear properties, a **specific two-step heat treatment is often employed**: a high-temperature solution anneal followed by an aging treatment at a lower temperature (e.g., 550-650°C) to precipitate fine copper particles within the matrix. **Welding is challenging** due to the copper content and requires specialized procedures, typically using nickel-based filler metals (e.g., ENiCrMo-3), and must be followed by the full heat treatment cycle. Procurement should explicitly specify **"FERRALIUM® 225 (UNS J32550) to ASTM A890 Grade 1B"** and require **full heat treatment documentation and certification.** Its selection is driven primarily by **wear/galling requirements in a corrosive environment.**
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MetalTek FERRALIUM® 225 UNS J32550 Duplex Stainless Steel Specification
Dimensions
Size：
Diameter 20-1000 mm Length <7283 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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MetalTek FERRALIUM® 225 UNS J32550 Duplex Stainless Steel Properties
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Applications of MetalTek FERRALIUM® 225 UNS J32550 Duplex Stainless Steel Flange
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Chemical Identifiers MetalTek FERRALIUM® 225 UNS J32550 Duplex Stainless Steel Flange
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Packing of MetalTek FERRALIUM® 225 UNS J32550 Duplex Stainless 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 3754 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
