Schmolz + Bickenbach UGICHROM 4507 Duplex Chrome

Schmolz + Bickenbach UGICHROM 4507 Duplex Chrome Plated Bar Product Information -:- For detailed product information, please contact sales. -: Schmolz + Bickenbach UGICHROM 4507 Duplex Chrome Plated Bar Synonyms -:- For detailed product information, please contact sales. -:

Schmolz + Bickenbach UGICHROM 4507 Duplex Chrome Plated Bar Product Information -:- For detailed product information, please contact sales. -: # **Product Name: Schmolz + Bickenbach UGICHROM® 4507 Super Duplex Chrome Plated Bar** ## **Introduction** Schmolz + Bickenbach UGICHROM® 4507 represents the pinnacle of chrome plated bar technology, featuring a **super duplex stainless steel core (EN 1.4507 / UNS S32750-type)**. This product is engineered for the **most extreme service environments on Earth**, where components must simultaneously withstand **severe chloride corrosion, high mechanical stress, sour (H₂S) service, and intense surface wear or galling**. By integrating a super duplex substrate with a hard chromium electroplate, it offers an unparalleled solution for critical applications in offshore, subsea, and aggressive chemical processing industries where failure is catastrophic and maintenance is prohibitively expensive. ## **Key Features** * **Extreme Core Performance:** The super duplex core provides **exceptional strength (Yield ≥ 550 MPa) and corrosion resistance (PREN > 40)**, offering resistance to pitting, crevice, and stress corrosion cracking in chloride and sour environments that would destroy standard materials. * **Ultra-Hard, Wear-Resistant Surface:** The engineered chromium plate delivers a surface hardness **≥ 900 HV**, providing maximum protection against abrasion, adhesive wear, and seizing in high-load sliding or sealing applications. * **Catastrophic Failure Resistance:** This is a "belt-and-suspenders" approach. The chrome plate is the primary barrier, but if damaged, the super duplex core provides **unmatched inherent corrosion resistance**, preventing rapid through-section failure—a critical safety feature. * **Engineered for Critical Duty:** Designed and certified for the most demanding specifications, including NACE MR0175 for sour service and stringent dimensional/plating quality controls for subsea and hydraulic applications. --- ## **1. Core Material: Super Duplex Stainless Steel (Typical - EN 1.4507 / UNS S32750)** The substrate is a premium super duplex alloy, the foundation of its performance. | Element (Core) | Content (%) | Note | | :---------------- | :------------ | :------------------------------------------------------------ | | Chromium (Cr) | 24.0 - 26.0 | Very high Cr for extreme corrosion resistance. | | Nickel (Ni) | 6.0 - 8.0 | Balances microstructure for strength and toughness. | | Molybdenum (Mo) | 3.0 - 4.0 | Critical for pitting resistance in chlorides. | | **Nitrogen (N)** | **0.24 - 0.32** | Key strengthener and microstructural stabilizer. | | **PREN (Core)** | **≥ 40** | Guarantees "super duplex" classification and performance. | --- ## **2. Coating Specification: Premium Hard Chromium Electroplate** | Property / Specification | Typical Value / Requirement | | :-------------------------------- | :------------------------------------------------------- | | **Coating Material** | High-Density Electrolytic Chromium. | | **Coating Thickness** | **Heavy-Duty Range: 30 - 100+ µm.** Optimized for service life. | | **Surface Hardness** | **≥ 900 HV** (Rockwell C 70+). Ultra-hard for severe wear. | | **Surface Roughness (Ra)** | **Precision-finished:** Typically 0.1 - 0.4 µm after grinding/polishing. Essential for hydraulic seal compatibility. | | **Adhesion** | **Exceptional,** verified by advanced methods (e.g., thermal cycling, scratch adhesion tests). | | **Porosity & Crack Density** | **Controlled microstructure;** often specified to meet **ASTM B117 Salt Spray** resistance for a defined period without substrate corrosion. | --- ## **3. Physical & Mechanical Properties (Composite Product)** | Property | Value / Range | | :-------------------------------------------- | :---------------------------------------------- | | Core Yield Strength (Rp0.2) | **≥ 550 MPa** | | Core Tensile Strength (Rm) | 800 - 1000 MPa | | **Effective Surface Hardness** | **≥ 900 HV** | | **Maximum Service Temperature (Core)** | ~250°C (to avoid embrittlement; plating stable to lower temps). | | **Critical Design Rule:** | **Component is dimensionally FINAL before plating. No post-plate deformation, welding, or significant machining is permissible.** | --- ## **4. Product Forms & Applications** **Available Product Forms:** * **Precision Chrome Plated Shafts & Piston Rods:** Centerless ground, polished, and plated to exacting tolerances for hydraulic and subsea applications. * **Custom Engineered Bars:** For OEM components requiring the ultimate in corrosion-wear performance. * **Pre-Plated Stock for Complex Components:** Supplied oversized for final machining of non-plated features (e.g., threads), followed by local re-plating under controlled conditions. **Primary Applications (Frontier Engineering):** UGICHROM 4507 is specified where operational boundaries are pushed: * **Subsea Oil & Gas:** Piston rods for **Subsea Production Control (SPC) modules**, hydraulic actuators for Christmas trees and manifolds, guide rods in corrosive, high-pressure seawater environments. * **Offshore & Marine Hydraulics:** Cylinder rods for heavy-lift equipment, jacking systems, and stern tube seals on vessels operating in aggressive waters. * **Chemical Processing (High-Pressure/High-Corrosion):** Agitator shafts, reactor stirrer shafts, and valve stems in processes involving concentrated acids, chlorides, and abrasive slurries. * **Energy & Desalination:** Components in advanced Flue Gas Desulfurization (FGD) systems and high-pressure pump rods in seawater reverse osmosis plants. * **Specialized Defense & Aerospace:** Components for systems requiring simultaneous corrosion resistance, high strength, and wear resistance in extreme environments. --- ## **5. International Standards & Approvals** This product must comply with the highest material and coating standards, often with project-specific supplements. | Component | Standard / Specification | Notes | | :---------------- | :-------------------------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------- | | **Base Bar** | **EN 10250-4 / EN 1.4507** (Open die forgings) or **EN 10088-3 / 1.4410**.
**ASTM A479 / UNS S32750**. | Core material certified to super duplex standards. | | **Chromium Plate**| **ISO 6158** Class 2 or higher (Engineering coatings).
**ASTM B177** (Engineering Chromium Plating). | Governs plating quality and thickness. | | **Sour Service** | **NACE MR0175/ISO 15156.** | The **core material** must be supplied with full NACE compliance documentation (heat treatment, hardness). | | **Project Specs** | **API 6A** (Wellhead and Christmas tree equipment), **API 17D** (Subsea production equipment), or **customer-specific performance specifications.** | Often required for oil & gas applications. | | **Key Procurement Document** | **Project-Specific Technical Purchase Agreement (TPA)** incorporating all relevant standards and the **UGICHROM 4507 Datasheet**. | A generic PO is insufficient for this product grade. | --- ## **Critical Technical & Procurement Note** **UGICHROM 4507 is a mission-critical engineered component. Its specification, manufacture, and qualification require a rigorous, collaborative approach.** 1. **Procurement via Technical Agreement (TPA):** Procurement **must** be governed by a detailed **Technical Purchase Agreement (TPA)** co-developed with Schmolz + Bickenbach engineering. This TPA defines: * **Core Material Pedigree:** Melt method (preferably ESR/VAR), full traceability, NACE compliance certification, and mechanical property ranges. * **Plating Specification:** Exact thickness, adhesion test method, acceptance criteria for porosity, and post-plate surface finish (Ra, Rz). * **Final Inspection & Testing:** 100% dimensional inspection, hardness tests, non-destructive testing (e.g., MPI for core, coating thickness mapping), and often functional testing. 2. **Fabrication Philosophy: "Plate Last":** The manufacturing sequence is sacred: **Final Machining -> Cleaning/Activation -> Plating -> Final Polish/Inspection.** Any welding, heat treatment, or significant mechanical work **must** be completed on the unplated core material. The plated component is a finished item. 3. **Coating-Substrate Interface Integrity:** Due to the passive layer on duplex steel, achieving perfect adhesion is challenging. The TPA must specify the **pre-plating surface activation process** and the **adhesion test method and acceptance criteria** (e.g., ISO 2819, bend test). 4. **Certification & Traceability:** Require a **dossier-style certification pack** including: Material MTC with NACE stamps, Plating Process Record (including bath controls), Coating Inspection Reports, and Final Dimensional Report. Full **lot traceability from melt to finished rod** is mandatory. 5. **Justification & Alternatives:** This product is justified for **safety-critical, inaccessible, or extraordinarily high-replacement-cost applications**. For less extreme conditions, **UGICHROM 4462 (2205 core)** or solid wear-resistant alloys may be more cost-effective. For applications involving impact or bending, consider **nitrided super duplex** as an alternative. -:- For detailed product information, please contact sales. -: Schmolz + Bickenbach UGICHROM 4507 Duplex Chrome Plated Bar Specification Dimensions Size： Diameter 20-1000 mm Length <7310 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. -: Schmolz + Bickenbach UGICHROM 4507 Duplex Chrome Plated Bar Properties -:- For detailed product information, please contact sales. -:

Applications of Schmolz + Bickenbach UGICHROM 4507 Duplex Chrome Plated Bar -:- For detailed product information, please contact sales. -: Chemical Identifiers Schmolz + Bickenbach UGICHROM 4507 Duplex Chrome Plated Bar -:- For detailed product information, please contact sales. -:

Packing of Schmolz + Bickenbach UGICHROM 4507 Duplex Chrome Plated Bar -:- 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 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 3781 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