MetalTek,MTEK 2507 Cast UNS J93404 Duplex Stainless Steel Sheet,Plate

MetalTek MTEK 2507 Cast UNS J93404 Duplex Stainless Steel Sheet/Plate Product Information -:- For detailed product information, please contact sales. -: MetalTek MTEK 2507 Cast UNS J93404 Duplex Stainless Steel Sheet/Plate Synonyms -:- For detailed product information, please contact sales. -:

MetalTek MTEK 2507 Cast UNS J93404 Duplex Stainless Steel Product Information -:- For detailed product information, please contact sales. -: **Product Name:** MetalTek MTEK 2507 Cast Duplex Stainless Steel (UNS J93404 / ASTM A995 Gr. 4A/5A) **Introduction:** MetalTek MTEK 2507 is a premium **cast super duplex stainless steel**, serving as the direct cast equivalent to the renowned wrought super duplex grade UNS S32750. It represents the pinnacle of corrosion resistance and mechanical strength within the standard cast duplex stainless steel family. Engineered with high chromium, molybdenum, and nitrogen content, MTEK 2507 delivers **exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC)** in the most aggressive environments, including high-chloride, acidic, and sour (H₂S) services. It is the material of choice for critical cast components where standard duplex alloys are at their performance limits. **Key Features:** * **Extreme Corrosion Resistance:** Offers outstanding resistance to localized corrosion and SCC, with a Pitting Resistance Equivalent Number (PREN) typically > 40, making it suitable for severe chloride exposures. * **Very High Mechanical Strength:** Provides approximately double the yield strength of standard CF-8M (316) castings and significantly higher strength than cast 2205 duplex, enabling robust, lightweight designs for high-pressure applications. * **Excellent Erosion-Corrosion Resistance:** The combination of high hardness and inherent corrosion resistance ensures superior performance in high-flow, slurry, and cavitating services. * **Proven Sour Service Capability:** When properly heat-treated, it meets the stringent requirements for components in sour oil and gas environments. --- **1. Chemical Composition (Typical Weight % - ASTM A995)** The composition is tightly controlled to achieve a balanced, high-performance austenite-ferrite microstructure. | Element | Content (%) | Element | Content (%) | | :------------- | :------------ | :------------- | :---------- | | Chromium (Cr) | 24.0 - 27.0 | Nickel (Ni) | 6.0 - 8.0 | | Molybdenum (Mo)| 3.0 - 4.0 | **Nitrogen (N)**| **0.20 - 0.30** | | Manganese (Mn) | ≤ 1.5 | Copper (Cu) | ≤ 0.50 | | Silicon (Si) | ≤ 1.00 | Carbon (C) | ≤ 0.03 | | Phosphorus (P) | ≤ 0.035 | Sulfur (S) | ≤ 0.025 | | Tungsten (W) | 0.50 - 1.00* | | | | **Iron (Fe)** | **Balance** | | | **\*Note:** Tungsten (W) is a key alloying element in many super duplex specifications, enhancing pitting resistance. Its inclusion may vary slightly by exact specification (e.g., ASTM A995 Grade 4A vs. 5A). **PREN Calculation:** PREN = %Cr + 3.3(%Mo + 0.5%W) + 16(%N) ≥ **40** (Typically **41-45**) --- **2. Physical & Mechanical Properties (Typical - Solution Annealed & Quenched)** | Property | Value / Range | | :-------------------------------------------- | :-------------------------------- | | Density | 7.8 g/cm³ | | Melting Range | ~1350 - 1420 °C | | Modulus of Elasticity | ~200 GPa | | **Tensile Strength (Rm)** | **795 - 1000 MPa** | | **Yield Strength (Rp0.2)** | **≥ 550 MPa** | | **Elongation (A in 50mm)** | **≥ 15 %** | | Hardness (Brinell) | 280 - 350 HBW | | **Impact Toughness (Charpy V-notch)** | **≥ 60 J at -30°C** | | **Critical Pitting Temperature (CPT) - ASTM G48** | **Typically ≥ 65°C** | | Maximum Recommended Service Temperature | ~280°C | --- **3. Product Forms & Applications** **Available Product Forms:** * **Static and Shell Molded Sand Castings** * **Centrifugally Cast Pipes, Tubes, and Rolls** * **Investment Castings (for complex, high-precision parts)** * **Fully Machined and Finished Components** **Primary Applications (Severe Service):** MTEK 2507 is specified for the most demanding applications where failure is not an option: * **Oil & Gas – Subsea & Sour Service:** Christmas tree and wellhead components, valve bodies and trim (gate, seat), choke valves, pump casings and impellers in HPHT and aggressive sour wells. * **Chemical & Petrochemical:** Reactor internals, agitators, mixer shafts, and pump components for concentrated acids, chlorides, and oxidizing media. * **Power Generation – Advanced FGD:** Fan wheels, damper shafts, absorber tower internals, and spray headers in highly corrosive flue gas desulfurization systems. * **Marine & Offshore:** Large seawater pump casings, propeller shaft sleeves, stern tubes, and valve bodies for exposed marine environments. * **Desalination:** High-pressure pump impellers and diffusers in seawater reverse osmosis (SWRO) plants. * **Pulp & Paper:** Impellers and casings for high-temperature, corrosive chemical circulation pumps. --- **4. International Standards & Approvals** MTEK 2507 conforms to the highest-tier specifications for cast super duplex stainless steels. | Standard Type | Standard Number & Designation | Notes | | :------------------ | :--------------------------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------- | | **Unified Numbering System (UNS)** | **J93404** | The standard UNS designation for cast super duplex (e.g., CD3MWCuN). | | **ASTM (USA)** | **ASTM A995/A995M** (Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel for Pressure-Containing Parts) | **Grade 4A or 5A** are the typical procurement grades for this alloy composition. Grade 5A often includes W. | | | **ASTM A890/A890M Grade 6A** | Also a common specification, similar to ASTM A995 Grade 4A/5A. | | **NACE MR0175/ISO 15156** | **Compliant (with strict heat treatment controls)** | Qualified for sour service. Requires solution annealing and verification of microstructure and hardness (typically ≤ 36 HRC). | | **ASME Boiler & Pressure Vessel Code** | **Section II, Part A** - Approved under SA-351 (investment) or SA-995 specifications. | For pressure-retaining castings in ASME-stamped equipment. | | **Key Procurement Specification** | **MetalTek MTEK 2507 Technical Datasheet** in conjunction with **ASTM A995 Grade 4A/5A** or project-specific specifications. | MetalTek's datasheet defines the proprietary foundry practice and guaranteed properties. | **Critical Foundry & Fabrication Note:** MTEK 2507 is a **high-performance cast alloy requiring expert metallurgical control**. The **solution annealing heat treatment is absolutely critical** and must be performed within a precise, high-temperature range (e.g., 1120-1180°C) followed by a rapid water quench to achieve the correct phase balance and dissolve harmful intermetallic phases (sigma, chi). **Welding of castings is complex and should be minimized.** If required, it **must** use **highly over-matching super duplex (e.g., ER2594) or nickel-based (e.g., Alloy 625) filler metals**, followed by a **full re-solution anneal and quench**. Procurement must specify **ASTM A995 Grade 4A/5A (UNS J93404)** and require **certified heat treatment charts, chemical analysis, mechanical test reports, and microstructure/ferrite content verification (target 35-55%).** -:- For detailed product information, please contact sales. -: MetalTek MTEK 2507 Cast UNS J93404 Duplex Stainless Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7282 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 MTEK 2507 Cast UNS J93404 Duplex Stainless Steel Properties -:- For detailed product information, please contact sales. -:

Applications of MetalTek MTEK 2507 Cast UNS J93404 Duplex Stainless Steel Sheet,Plate -:- For detailed product information, please contact sales. -: Chemical Identifiers MetalTek MTEK 2507 Cast UNS J93404 Duplex Stainless Steel Sheet,Plate -:- For detailed product information, please contact sales. -:

Packing of MetalTek MTEK 2507 Cast UNS J93404 Duplex Stainless Steel Sheet/Plate -:- 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 Sheet/Plate 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 3753 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