MetalTek,MTEK 29M Cast UNS J93370 Duplex Stainless Steel Tube,Pipe

MetalTek MTEK 29M Cast UNS J93370 Duplex Stainless Steel Tube Product Information -:- For detailed product information, please contact sales. -: MetalTek MTEK 29M Cast UNS J93370 Duplex Stainless Steel Tube Synonyms -:- For detailed product information, please contact sales. -:

MetalTek MTEK 29M Cast UNS J93370 Duplex Stainless Steel Product Information -:- For detailed product information, please contact sales. -: **Product Name:** MetalTek MTEK 29M Cast Duplex Stainless Steel (UNS J93370 / ASTM A890 Grade 5A) **Introduction:** MetalTek MTEK 29M is a premium **cast duplex (austenitic-ferritic) stainless steel** alloy designed to provide an exceptional combination of **high strength, excellent corrosion resistance, and superior castability**. As a cast equivalent to wrought super duplex stainless steels, it is engineered for severe service environments where standard stainless steel castings are inadequate. MTEK 29M offers **outstanding resistance to chloride stress corrosion cracking (SCC), pitting, and crevice corrosion**, along with **excellent erosion-corrosion resistance**, making it ideal for demanding industrial, marine, and energy applications. **Key Features:** * **Superior Corrosion Resistance:** Provides excellent resistance to a broad range of corrosive media, including seawater, chlorides, acids, and caustics, with a Pitting Resistance Equivalent Number (PREN) typically > 40. * **High Mechanical Strength:** Delivers significantly higher yield and tensile strength than standard austenitic stainless steel castings (e.g., CF-8M/316), allowing for more robust and reliable component design. * **Excellent Erosion & Cavitation Resistance:** The inherent hardness and microstructural stability of the duplex matrix offer superior performance in high-flow, slurry, and cavitating service conditions. * **Optimized for Casting:** Specifically formulated to provide good foundry characteristics, including fluidity and soundness, in complex investment, sand, and static castings. --- **1. Chemical Composition (Typical Weight % - ASTM A890 5A)** The composition is balanced to ensure a stable, corrosion-resistant austenite-ferrite microstructure in the as-cast or heat-treated condition. | Element | Content (%) | Element | Content (%) | | :------------- | :------------ | :------------- | :---------- | | Chromium (Cr) | 24.0 - 27.0 | Nickel (Ni) | 4.5 - 6.5 | | Molybdenum (Mo)| 2.0 - 3.0 | Nitrogen (N) | 0.10 - 0.25* | | Manganese (Mn) | ≤ 1.5 | Copper (Cu) | ≤ 1.0 | | Silicon (Si) | ≤ 1.50 | Carbon (C) | ≤ 0.06 | | Phosphorus (P) | ≤ 0.04 | Sulfur (S) | ≤ 0.03 | | **Iron (Fe)** | **Balance** | | | **\*Note:** Nitrogen content in cast alloys is typically achieved through precise control of melting atmosphere and charge materials, and is often reported as a typical value rather than a specified range in older standards. Modern heats are controlled to target the higher end for optimum properties. **PREN Calculation:** PREN = %Cr + 3.3(%Mo) + 16(%N) > **38** (Typically ≥ 40) --- **2. Physical & Mechanical Properties (Typical - Heat Treated Condition)** | Property | Value / Range | | :-------------------------------------------- | :-------------------------------- | | Density | 7.7 - 7.8 g/cm³ | | Melting Range | ~1350 - 1430 °C | | Modulus of Elasticity | ~200 GPa | | **Tensile Strength (Rm)** | **760 - 895 MPa** | | **Yield Strength (Rp0.2)** | **≥ 550 MPa** | | **Elongation (A in 50mm)** | **≥ 15 %** | | Hardness (Brinell) | 260 - 320 HBW | | **Impact Toughness (Charpy V-notch)** | **≥ 60 J at -30°C** | | Maximum Recommended Service Temperature | ~300°C (to avoid embrittlement) | --- **3. Product Forms & Applications** **Available Product Forms:** * **Static Sand Castings** * **Centrifugally Cast Tubes and Cylinders** * **Investment Castings (Precision Castings)** * **Finished Machined Components** **Primary Applications:** MTEK 29M is specified for critical components in extremely aggressive environments: * **Oil & Gas (Upstream & Midstream):** Subsea valve bodies, pump casings, impellers, choke and kill line components, wellhead parts in sour service. * **Chemical & Petrochemical Processing:** Pump casings, valve bodies, mixer blades, and reactor internals handling chlorides, acids, and caustics. * **Power Generation (FGD Systems):** Absorber tower nozzles, dampers, fan wheels, and spray headers in flue gas desulfurization units. * **Marine & Offshore:** Seawater pump casings, impellers, valve bodies, propeller shafts, and stern tube seals. * **Pulp & Paper:** Digester circulator pump components, black liquor strainer bodies. * **Water & Wastewater:** High-pressure pump components for reverse osmosis (RO) and abrasive slurry services. --- **4. International Standards & Approvals** As a cast product, MTEK 29M conforms to established ASTM standards for cast duplex stainless steels. | Standard Type | Standard Number & Designation | Notes | | :------------------ | :--------------------------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------- | | **Unified Numbering System (UNS)** | **J93370** | The standard UNS designation for this cast duplex alloy. | | **ASTM (USA)** | **ASTM A890/A890M** (Standard Specification for Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/Ferritic) for General Application) | **Grade 5A** is the specific grade designation for CD3MN (UNS J93370) within this standard. | | | **ASTM A487** (Steel Castings Suitable for Pressure Service) - Can be supplied to Grade 5A 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). | | **Other Approvals** | **ASME Boiler & Pressure Vessel Code, Section II, Part A** - SA-351 (for investment castings) or SA-487. | Approved for pressure-retaining applications. | | **Key Procurement Specification** | **MetalTek MTEK 29M Technical Datasheet** alongside **ASTM A890 Grade 5A** or equivalent project specifications. | Defines MetalTek's specific foundry controls and guaranteed properties. | **Critical Foundry & Fabrication Note:** MTEK 29M is a **specialist cast alloy** requiring precise **foundry control** and **heat treatment**. Castings must undergo a **solution annealing heat treatment** (typically at 1120-1170°C followed by rapid quenching) to dissolve harmful intermetallic phases and achieve the correct 40-60% ferrite/austenite balance. **Post-cast welding is possible but requires extreme caution**, using over-alloyed super duplex (e.g., ER2594) or nickel-alloy (e.g., ENiCrMo-3) filler metals, followed by a full re-solution anneal and quench to restore corrosion resistance. Procurement specifications must explicitly require **ASTM A890 Grade 5A** compliance and **certified heat treatment records**. -:- For detailed product information, please contact sales. -: MetalTek MTEK 29M Cast UNS J93370 Duplex Stainless Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7279 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 29M Cast UNS J93370 Duplex Stainless Steel Properties -:- For detailed product information, please contact sales. -:

Applications of MetalTek MTEK 29M Cast UNS J93370 Duplex Stainless Steel Tube -:- For detailed product information, please contact sales. -: Chemical Identifiers MetalTek MTEK 29M Cast UNS J93370 Duplex Stainless Steel Tube -:- For detailed product information, please contact sales. -:

Packing of MetalTek MTEK 29M Cast UNS J93370 Duplex Stainless Steel Tube -:- 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 Tube 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 3750 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