MetalTek,ESCOLOY 45D® Cast UNS J93345 Duplex Stainless Steel Wire

MetalTek ESCOLOY 45D® Cast UNS J93345 Duplex Stainless Steel Wire Product Information -:- For detailed product information, please contact sales. -: MetalTek ESCOLOY 45D® Cast UNS J93345 Duplex Stainless Steel Wire Synonyms -:- For detailed product information, please contact sales. -:

MetalTek ESCOLOY 45D® Cast UNS J93345 Duplex Stainless Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Name: MetalTek ESCOLOY 45D® Cast Duplex Stainless Steel (UNS J93345)** ## **Introduction** MetalTek ESCOLOY 45D® (UNS J93345) is a **high-performance, copper-modified duplex (austenitic-ferritic) stainless steel casting alloy**, engineered to deliver a specialized balance of **high strength, excellent corrosion resistance, and superior wear characteristics**. As part of the established ESCOLOY® alloy family, it builds upon the duplex stainless steel foundation by incorporating strategic additions of copper and molybdenum. This composition is tailored to provide **exceptional resistance to stress corrosion cracking (SCC), pitting, and sulfuric acid attack**, making it a preferred material for demanding industrial applications, particularly in chemical processing and pulp and paper industries. ## **Key Features** * **Excellent Sulfuric Acid Resistance:** Specifically formulated to offer superior performance in sulfuric acid environments across a wide range of concentrations and temperatures, outperforming many standard stainless steels. * **High Strength & SCC Resistance:** Provides approximately double the yield strength of standard CF-8/CF-8M austenitic castings, coupled with excellent resistance to chloride-induced stress corrosion cracking. * **Enhanced Wear & Galling Resistance:** The copper content improves resistance to adhesive wear and galling in metal-to-metal contact applications, a valuable property for components like bushings and wear rings. * **Proven Performance in Aggressive Media:** A long-service-history alloy trusted for reliability in complex chemical mixtures containing chlorides, sulfates, and organic acids. --- ## **1. Chemical Composition (Typical Weight %)** The composition is optimized for sulfuric acid service and general corrosion resistance. | Element | Content (%) | Element | Content (%) | | :------------- | :------------ | :------------- | :---------- | | Chromium (Cr) | 24.0 - 27.0 | Nickel (Ni) | 4.5 - 6.5 | | Molybdenum (Mo)| 1.75 - 2.50 | **Copper (Cu)**| **1.50 - 2.50** | | Manganese (Mn) | ≤ 1.5 | Nitrogen (N) | 0.08 - 0.20* | | Silicon (Si) | ≤ 1.50 | Carbon (C) | ≤ 0.06 | | Phosphorus (P) | ≤ 0.040 | Sulfur (S) | ≤ 0.040 | | **Iron (Fe)** | **Balance** | | | **\*Note:** Nitrogen control is a feature of modern production for improved pitting resistance and strength. **Key Alloying Note:** The **copper (Cu)** content is critical for sulfuric acid resistance and improves anti-galling properties. The **molybdenum (Mo)** content enhances pitting resistance. **PREN Calculation:** PREN = %Cr + 3.3(%Mo) + 16(%N) ≈ **30 - 35** --- ## **2. Physical & Mechanical Properties (Typical - Heat Treated Condition)** | Property | Value / Range | | :-------------------------------------------- | :-------------------------------- | | Density | 7.7 - 7.8 g/cm³ | | Melting Range | ~1360 - 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 - 310 HBW | | **Impact Toughness (Charpy V-notch)** | **≥ 60 J at -30°C** | --- ## **3. Product Forms & Applications** **Available Product Forms:** * **Static and Shell Molded Sand Castings** * **Centrifugally Cast Tubes and Liners** * **Investment Castings** * **Finished Machined Components** **Primary Applications:** ESCOLOY 45D® is historically specified for severe chemical environments: * **Chemical Processing:** Pump casings, impellers, valve bodies, agitators, and mixer shafts for sulfuric acid production, pickling lines, and fertilizer (phosphate) industry equipment. * **Pulp & Paper Industry:** Digester impregnation vessels, liquor circulation pumps, black liquor evaporator components, and bleach plant equipment. * **Oil & Gas (Downstream):** Components in refining and gas processing units exposed to sulfidic and acidic conditions. * **General Industrial:** Fans, housings, and ducting for corrosive fume handling systems. --- ## **4. International Standards & Approvals** ESCOLOY 45D® is a proprietary alloy with established correlations to standard specifications. | Standard Type | Standard Number & Designation | Notes | | :------------------ | :--------------------------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------- | | **Unified Numbering System (UNS)** | **J93345** | The UNS designation for this specific copper-containing cast duplex alloy. | | **ASTM (USA)** | Historically correlates with **ASTM A890 Grade 1B (CD4MCu)** or similar specifications for duplex castings with Cu. | The alloy predates and may have compositional nuances compared to the generic CD4MCu specification. | | **Key Procurement Specification** | **MetalTek ESCOLOY 45D® Technical Datasheet** is the primary controlling document. | For guaranteed properties, the proprietary ESCOLOY 45D® specification must be referenced. | --- ## **Critical Foundry & Fabrication Note** ESCOLOY 45D® is a **specialist alloy requiring specific foundry and heat treatment knowledge**. 1. **Heat Treatment is Critical:** To achieve the optimal duplex microstructure and precipitate the copper for maximum corrosion and wear benefits, a **two-step heat treatment is typically required**. This involves a high-temperature solution anneal (e.g., 1040-1100°C) followed by a lower-temperature aging treatment (e.g., 550-650°C). The exact cycle is proprietary to MetalTek and essential for performance. 2. **Welding Considerations:** Welding is challenging due to the alloy's complex composition and heat treatment sensitivity. If repair is necessary, it should be performed using **nickel-based filler metals** (e.g., ENiCrMo-3) and must be followed by a **complete re-application of the full two-step heat treatment cycle** to restore properties. 3. **Application-Specific Selection:** The primary driver for selecting ESCOLOY 45D® is its **proven track record in sulfuric acid and complex chemical media**. It is less of a general-purpose duplex and more of a targeted solution for specific corrosive challenges. Consulting MetalTek's application engineers is strongly recommended. 4. **Procurement Requirement:** To ensure receipt of the genuine alloy with its guaranteed performance, the purchase order must explicitly specify **"MetalTek ESCOLOY 45D® (UNS J93345)"** and require certification documenting the **proprietary heat treatment cycle**. -:- For detailed product information, please contact sales. -: MetalTek ESCOLOY 45D® Cast UNS J93345 Duplex Stainless Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7285 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 ESCOLOY 45D® Cast UNS J93345 Duplex Stainless Steel Properties -:- For detailed product information, please contact sales. -:

Applications of MetalTek ESCOLOY 45D® Cast UNS J93345 Duplex Stainless Steel Wire -:- For detailed product information, please contact sales. -: Chemical Identifiers MetalTek ESCOLOY 45D® Cast UNS J93345 Duplex Stainless Steel Wire -:- For detailed product information, please contact sales. -:

Packing of MetalTek ESCOLOY 45D® Cast UNS J93345 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 3756 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