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 MTEK 2205 Cast UNS J92205 Duplex Stainless Steel Flange Product Information
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MetalTek MTEK 2205 Cast UNS J92205 Duplex Stainless Steel Flange Synonyms
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MetalTek MTEK 2205 Cast UNS J92205 Duplex Stainless Steel Product Information
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**Product Name:** MetalTek MTEK 2205 Cast Duplex Stainless Steel (UNS J92205 / ASTM A890 Grade 1B)
**Introduction:**
MetalTek MTEK 2205 is a premium **cast duplex (austenitic-ferritic) stainless steel** that serves as the **cast analog to the ubiquitous wrought 2205 (UNS S32205/S31803) alloy**. It is engineered to provide the **optimal balance of high strength and excellent corrosion resistance** in cast component form. This alloy delivers approximately double the yield strength of standard austenitic stainless steel castings (e.g., CF-8M/316) while offering superior resistance to chloride stress corrosion cracking (SCC), pitting, and crevice corrosion. MTEK 2205 is the industry's workhorse for converting the proven benefits of duplex stainless steel into complex, high-integrity cast parts for demanding applications.
**Key Features:**
* **Proven 2205 Performance in Cast Form:** Replicates the trusted strength-corrosion balance of wrought 2205, enabling direct material substitution for parts requiring casting manufacture.
* **Exceptional Strength-to-Weight Advantage:** High yield strength allows for thinner sections, lighter components, and improved pressure ratings compared to standard austenitic cast steels.
* **Superior Stress Corrosion Cracking (SCC) Resistance:** Outstanding resistance to chloride-induced SCC, a common failure mode for 300-series austenitic stainless steels in many process environments.
* **Good Castability and Weldability:** Designed for reliable production of sound castings and can be repaired or fabricated using qualified procedures with appropriate duplex filler metals.
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**1. Chemical Composition (Typical Weight % - ASTM A890 1B)**
The composition is balanced to achieve a stable ~50/50 austenite-ferrite microstructure in the heat-treated condition, mirroring the performance of wrought 2205.
| Element | Content (%) | Element | Content (%) |
| :------------- | :------------ | :------------- | :---------- |
| Chromium (Cr) | 21.0 - 24.0 | Nickel (Ni) | 4.5 - 6.5 |
| Molybdenum (Mo)| 2.5 - 3.5 | Nitrogen (N) | 0.08 - 0.20* |
| Manganese (Mn) | ≤ 2.00 | Copper (Cu) | ≤ 1.00 |
| Silicon (Si) | ≤ 1.50 | Carbon (C) | ≤ 0.06 |
| Phosphorus (P) | ≤ 0.045 | Sulfur (S) | ≤ 0.045 |
| **Iron (Fe)** | **Balance** | | |
**\*Note:** Nitrogen is a critical alloying element. Modern foundry practice tightly controls nitrogen to the mid-to-upper end of the range for optimal properties, though it may not be explicitly listed on all legacy certificates.
**PREN Calculation:** PREN = %Cr + 3.3(%Mo) + 16(%N) ≈ **32 - 36**
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**2. Physical & Mechanical Properties (Typical - Solution Annealed & Quenched)**
| Property | Value / Range |
| :-------------------------------------------- | :-------------------------------- |
| Density | 7.7 - 7.8 g/cm³ |
| Melting Range | ~1370 - 1440 °C |
| Modulus of Elasticity | ~200 GPa |
| **Tensile Strength (Rm)** | **690 - 860 MPa** |
| **Yield Strength (Rp0.2)** | **≥ 485 MPa** |
| **Elongation (A in 50mm)** | **≥ 18 %** |
| Hardness (Brinell) | 240 - 300 HBW |
| **Impact Toughness (Charpy V-notch)** | **≥ 80 J at -30°C** |
| Maximum Recommended Service Temperature | ~300°C (to avoid embrittlement) |
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**3. Product Forms & Applications**
**Available Product Forms:**
* **Static and Shell Molded Sand Castings**
* **Centrifugally Cast Pipes, Tubes, and Cylinders**
* **Investment Castings (for precision parts)**
* **Finished, Machined Components**
**Primary Applications:**
MTEK 2205 is the go-to cast duplex alloy for a vast range of industrial applications requiring a step-change in performance from standard stainless steel castings:
* **Oil & Gas:** Pump casings, valve bodies, choke valves, wellhead components, and manifolds for offshore, subsea, and sour service.
* **Chemical & Petrochemical Processing:** Mixer shafts, agitators, reactor internals, impellers, and casing rings for chloride and acid services.
* **Pulp & Paper:** Impellers, fan wheels, and casing parts in bleach plants and chemical recovery systems.
* **Marine & Offshore:** Seawater pump components, valve bodies, and fittings for shipboard and platform systems.
* **Flue Gas Desulfurization (FGD):** Dampers, absorber tower nozzles, and agitators in pollution control scrubbers.
* **Water & Wastewater:** Pump components for brackish and seawater applications.
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**4. International Standards & Approvals**
As a cast alloy, MTEK 2205 aligns with standardized cast duplex specifications.
| Standard Type | Standard Number & Designation | Notes |
| :------------------ | :--------------------------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------- |
| **Unified Numbering System (UNS)** | **J92205** | The standard UNS designation for this cast duplex alloy (CD4MCu / CD3MN). |
| **ASTM (USA)** | **ASTM A890/A890M** | **Grade 1B** is the specific grade designation within this standard. |
| | **ASTM A487** (Steel Castings Suitable for Pressure Service) - Can be supplied to Grade 1B or similar duplex requirements. | Common for pressure-retaining castings. |
| **NACE MR0175/ISO 15156** | **Compliant (with proper heat treatment)** | Can be qualified for sour (H₂S) service, subject to specific heat treatment and maximum hardness requirements (typically ≤ 28 HRC). |
| **ASME Boiler & Pressure Vessel Code** | **Section II, Part A** - Can be approved under SA-351 (investment) or SA-487 (sand) specifications. | For use in ASME pressure equipment. |
| **Key Procurement Specification** | **MetalTek MTEK 2205 Technical Datasheet** alongside **ASTM A890 Grade 1B** or equivalent project specifications. | Defines MetalTek's specific foundry controls and guaranteed properties. |
**Critical Foundry & Fabrication Note:**
MTEK 2205 is a **specialist cast alloy**. To achieve its properties, castings **must** undergo a **full solution annealing heat treatment** (typically at 1025-1120°C followed by rapid quenching) to dissolve harmful secondary phases and achieve the correct ferrite-austenite balance. **Post-cast welding is feasible but requires strict control**, using duplex stainless steel filler metals (e.g., ER2209) and must be followed by a **local or full re-solution anneal and quench** to restore corrosion resistance in the heat-affected zone. Procurement must explicitly require **ASTM A890 Grade 1B (UNS J92205)** compliance, **certified heat treatment records**, and **mechanical test reports**. A ferrite content check (target 35-55%) is highly recommended for critical service.
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MetalTek MTEK 2205 Cast UNS J92205 Duplex Stainless Steel Specification
Dimensions
Size：
Diameter 20-1000 mm Length <7281 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 MTEK 2205 Cast UNS J92205 Duplex Stainless Steel Properties
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Applications of MetalTek MTEK 2205 Cast UNS J92205 Duplex Stainless Steel Flange
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Chemical Identifiers MetalTek MTEK 2205 Cast UNS J92205 Duplex Stainless Steel Flange
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Packing of MetalTek MTEK 2205 Cast UNS J92205 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 3752 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
