MetalTek,FERRALIUM® 225 UNS J32550 Duplex Stainless Steel Wire

MetalTek FERRALIUM® 225 UNS J32550 Duplex Stainless Steel Wire Product Information -:- For detailed product information, please contact sales. -: MetalTek FERRALIUM® 225 UNS J32550 Duplex Stainless Steel Wire Synonyms -:- For detailed product information, please contact sales. -:

MetalTek FERRALIUM® 225 UNS J32550 Duplex Stainless Steel Product Information -:- For detailed product information, please contact sales. -: **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. --- **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** --- **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** | --- **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. --- **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.** -:- For detailed product information, please contact sales. -: 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 -:- For detailed product information, please contact sales. -: MetalTek FERRALIUM® 225 UNS J32550 Duplex Stainless Steel Properties -:- For detailed product information, please contact sales. -:

Applications of MetalTek FERRALIUM® 225 UNS J32550 Duplex Stainless Steel Wire -:- For detailed product information, please contact sales. -: Chemical Identifiers MetalTek FERRALIUM® 225 UNS J32550 Duplex Stainless Steel Wire -:- For detailed product information, please contact sales. -:

Packing of MetalTek FERRALIUM® 225 UNS J32550 Duplex Stainless Steel Wire -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Wire 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