MetalTek,MTEK 29MN Cast UNS J93372 Duplex Stainless Steel Sheet,Plate

MetalTek MTEK 29MN Cast UNS J93372 Duplex Stainless Steel Sheet/Plate Product Information -:- For detailed product information, please contact sales. -: MetalTek MTEK 29MN Cast UNS J93372 Duplex Stainless Steel Sheet/Plate Synonyms -:- For detailed product information, please contact sales. -:

MetalTek MTEK 29MN Cast UNS J93372 Duplex Stainless Steel Product Information -:- For detailed product information, please contact sales. -: **Product Name:** MetalTek MTEK 29MN Cast Duplex Stainless Steel (UNS J93372 / ASTM A890 Grade 6A) **Introduction:** MetalTek MTEK 29MN is a premium **nitrogen-enhanced super duplex stainless steel casting alloy**, representing an advanced evolution within the duplex casting family. As the designated upgrade to MTEK 29M, this alloy incorporates **higher, controlled nitrogen content** to significantly boost its **mechanical strength, localized corrosion resistance, and microstructural stability**. MTEK 29MN is engineered for the most severe service conditions where standard duplex castings may be marginal, offering performance that closely mirrors or exceeds that of wrought super duplex grades like UNS S32750, but in complex cast geometries. **Key Features:** * **Enhanced Strength & Hardness:** The deliberate nitrogen addition provides a substantial increase in yield and tensile strength, as well as hardness, offering superior resistance to mechanical wear, erosion, and galling. * **Superior Localized Corrosion Resistance:** Achieves a higher Pitting Resistance Equivalent Number (PREN > 40), delivering exceptional resistance to pitting and crevice corrosion in high-chloride and sour environments. * **Improved Structural Stability:** The optimized nitrogen content promotes a more stable and balanced austenite-ferrite microstructure, enhancing resistance to the formation of detrimental intermetallic phases during casting and heat treatment. * **Robust Castability:** Maintains excellent foundry characteristics for producing sound, high-integrity castings in complex shapes via sand, investment, or centrifugal processes. --- **1. Chemical Composition (Typical Weight % - ASTM A890 6A)** The composition is precisely controlled, with nitrogen as a key specified alloying element. | Element | Content (%) | Element | Content (%) | | :------------- | :------------ | :------------- | :---------- | | Chromium (Cr) | 24.0 - 27.0 | Nickel (Ni) | 5.5 - 7.5 | | Molybdenum (Mo)| 2.5 - 3.5 | **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 | | **Iron (Fe)** | **Balance** | | | **Key Alloying Note:** The **guaranteed, elevated nitrogen range (0.20-0.30%)** is the primary differentiator from MTEK 29M, driving its enhanced properties. **PREN Calculation:** PREN = %Cr + 3.3(%Mo) + 16(%N) ≥ **40** (Typically **41-44**) --- **2. Physical & Mechanical Properties (Typical - Solution Annealed & Quenched)** | Property | Value / Range | | :-------------------------------------------- | :-------------------------------- | | Density | 7.7 - 7.8 g/cm³ | | Melting Range | ~1350 - 1420 °C | | Modulus of Elasticity | ~200 GPa | | **Tensile Strength (Rm)** | **795 - 930 MPa** | | **Yield Strength (Rp0.2)** | **≥ 620 MPa** | | **Elongation (A in 50mm)** | **≥ 15 %** | | Hardness (Brinell) | 280 - 340 HBW | | **Impact Toughness (Charpy V-notch)** | **≥ 54 J at -30°C** | | **Critical Pitting Temperature (CPT)** | **Typically ≥ 60°C** | | Maximum Recommended Service Temperature | ~280°C | --- **3. Product Forms & Applications** **Available Product Forms:** * **Static and Shell Molded Sand Castings** * **Centrifugally Cast Tubes, Pipes, and Rings** * **Investment Castings (for complex, high-precision parts)** * **Fully Machined and Finished Components** **Primary Applications (Severe Service):** MTEK 29MN is specified for critical components where failure is not an option: * **Oil & Gas – Subsea & Sour Service:** Christmas tree and wellhead components, valve bodies and trim, choke valves, pump casings and impellers in HPHT (High-Pressure High-Temperature) and sour (H₂S) wells. * **Chemical & Petrochemical:** Reactor cladding support rings, agitators, mixer shafts, and pump components for concentrated acids and chlorides. * **Power Generation – Advanced FGD:** Fan wheels, damper shafts, absorber tower internals, and spray headers in highly corrosive flue gas cleaning systems. * **Marine & Offshore:** Large seawater pump casings, propeller shaft sleeves, stern tubes, and high-load bearing components. * **Pulp & Paper:** Impellers and casings for high-temperature, corrosive chemical circulation pumps. * **Water Treatment:** High-pressure pump components for seawater reverse osmosis (SWRO) desalination plants. --- **4. International Standards & Approvals** MTEK 29MN conforms to the nitrogen-enhanced grade within the cast duplex stainless steel standards. | Standard Type | Standard Number & Designation | Notes | | :------------------ | :--------------------------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------- | | **Unified Numbering System (UNS)** | **J93372** | The standard UNS designation for this N-enhanced cast duplex alloy (CD3MWCuN). | | **ASTM (USA)** | **ASTM A890/A890M** | **Grade 6A** is the specific grade designation for UNS J93372. This is the primary procurement standard. | | | **ASTM A487** (Steel Castings Suitable for Pressure Service) - Can be supplied to Grade 6A requirements. | Commonly specified for pressure-containing parts. | | **NACE MR0175/ISO 15156** | **Compliant (with strict heat treatment controls)** | Can be qualified for sour service. Requires solution annealing and verification of microstructure and hardness (typically ≤ 32 HRC). | | **ASME Boiler & Pressure Vessel Code** | **Section II, Part A** - Can be approved under SA-351 (investment) or SA-487 (sand) specifications meeting Grade 6A requirements. | For pressure-retaining castings in ASME-stamped equipment. | | **Key Procurement Specification** | **MetalTek MTEK 29MN Technical Datasheet** in conjunction with **ASTM A890 Grade 6A** or project-specific material specifications. | MetalTek's datasheet defines the proprietary foundry practice and guaranteed enhanced properties. | **Critical Foundry & Fabrication Note:** MTEK 29MN 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 temperature range (e.g., 1120-1160°C) followed by a rapid quench to achieve the correct phase balance and dissolve intermetallics. **Welding of castings should be minimized and is a critical operation.** 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 A890 Grade 6A (UNS J93372)** and require **certified heat treatment charts, chemical analysis, mechanical test reports, and often microstructure/ferrite content verification.** -:- For detailed product information, please contact sales. -: MetalTek MTEK 29MN Cast UNS J93372 Duplex Stainless Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7280 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 29MN Cast UNS J93372 Duplex Stainless Steel Properties -:- For detailed product information, please contact sales. -:

Applications of MetalTek MTEK 29MN Cast UNS J93372 Duplex Stainless Steel Sheet,Plate -:- For detailed product information, please contact sales. -: Chemical Identifiers MetalTek MTEK 29MN Cast UNS J93372 Duplex Stainless Steel Sheet,Plate -:- For detailed product information, please contact sales. -:

Packing of MetalTek MTEK 29MN Cast UNS J93372 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 3751 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