Schmolz + Bickenbach UGICHROM 4462 Duplex Chrome

Schmolz + Bickenbach UGICHROM 4462 Duplex Chrome Plated Bar Product Information -:- For detailed product information, please contact sales. -: Schmolz + Bickenbach UGICHROM 4462 Duplex Chrome Plated Bar Synonyms -:- For detailed product information, please contact sales. -:

Schmolz + Bickenbach UGICHROM 4462 Duplex Chrome Plated Bar Product Information -:- For detailed product information, please contact sales. -: # **Product Name: Schmolz + Bickenbach UGICHROM® 4462 Chrome Plated Bar (Duplex Stainless Steel Core)** ## **Introduction** Schmolz + Bickenbach UGICHROM® 4462 is a high-performance **chrome plated bar product with a standard duplex stainless steel core**, specifically engineered to meet the demands of **severe corrosive and high-strength applications**. This product combines the **exceptional mechanical properties and chloride stress corrosion cracking (SCC) resistance of duplex stainless steel (EN 1.4462)** with the **extreme surface hardness, wear resistance, and low-friction characteristics of a hard chromium electroplate**. It is designed for critical components where the underlying material must survive aggressive environments, while the surface must withstand abrasion, galling, and provide a durable finish. ## **Key Features** * **Premium Core Properties:** Utilizes a **standard duplex stainless steel core (similar to 2205)**, offering over double the yield strength of 316L and excellent resistance to pitting, crevice, and stress corrosion cracking (PREN ≥ 34). * **Hard, Wear-Resistant Surface:** The electrolytic chromium plate provides a surface hardness **≥ 800 HV**, offering outstanding protection against adhesive wear, fretting, and galling. * **Enhanced Corrosion Protection System:** The chrome plate acts as an impervious barrier against a wide range of corrosive media. The duplex core provides **catastrophic corrosion resistance**; even if the plate is damaged, the substrate resists aggressive attack, unlike plated carbon steel. * **Ideal for Severe Service:** Designed for components exposed to combinations of **corrosion, high mechanical load, and surface wear**, such as in chemical processing, marine hydraulics, and offshore equipment. --- ## **1. Core Material: Standard Duplex Stainless Steel (Typical - EN 1.4462 / UNS S32205)** The base bar is a premium duplex grade, providing the fundamental strength and corrosion resistance. | Element (Core) | Content (%) | Note | | :---------------- | :------------ | :------------------------------------------------------------ | | Chromium (Cr) | 22.0 - 23.0 | High chromium for corrosion resistance. | | Nickel (Ni) | 4.5 - 6.5 | Balances the duplex microstructure. | | Molybdenum (Mo) | 3.0 - 3.5 | Critical for pitting and crevice corrosion resistance. | | Nitrogen (N) | 0.14 - 0.20 | Strengthener and key for phase balance. | | **PREN (Core)** | **≥ 34** | Guarantees high resistance to localized corrosion. | --- ## **2. Coating Specification: Hard Chromium Electroplate** | Property / Specification | Typical Value / Requirement | | :-------------------------------- | :------------------------------------------------------- | | **Coating Material** | Electrolytic Chromium (Cr). | | **Coating Thickness** | Standard: 20 - 50 µm. Heavier deposits (up to 100+ µm) available for severe wear applications. | | **Surface Hardness** | **≥ 800 HV** (Rockwell C 68+). | | **Surface Roughness (Ra)** | As-plated: ~0.2 - 0.8 µm. Can be polished to mirror finish (< 0.1 µm) for hydraulic applications. | | **Adhesion** | Excellent, per ISO 2819 or ASTM B571. Critical for service under load. | | **Porosity** | Dense, low-porosity deposit. Specific tests (e.g., ferroxyl test) can be specified. | --- ## **3. Physical & Mechanical Properties (Composite Product)** | Property | Value / Range | | :-------------------------------------------- | :---------------------------------------------- | | Core Yield Strength (Rp0.2) | **≥ 500 MPa** | | Core Tensile Strength (Rm) | 700 - 900 MPa | | **Effective Surface Hardness** | **≥ 800 HV** | | Coefficient of Friction (Chromium vs. Steel) | Low (≈ 0.15-0.20) | | **Design Warning:** | **The chrome coating is brittle. The component must be designed to its final dimensions before plating. Post-plating forming or machining of the chrome layer is not possible without damaging it.** | --- ## **4. Product Forms & Applications** **Available Product Forms:** * **Chrome Plated Round Bars and Shafts:** Precision-ground or turned, then plated. Standard and custom lengths. * **Pre-Plated Stock for Machining:** Supplied oversized to allow machining of critical features (e.g., threads, grooves) post-plating, followed by re-plating of those features. **Primary Applications (Severe Dual-Condition Service):** UGICHROM 4462 is specified for the most demanding roles where both material and surface must excel: * **Chemical & Petrochemical Industry:** Piston rods for process valve actuators, pump shafts, and mixer guide columns exposed to corrosive splashes or fumes and mechanical wear. * **Marine & Offshore Hydraulics:** Rods for hydraulic cylinders on deck machinery, steering gears, and offshore platforms exposed to saltwater spray and requiring wear resistance in seal areas. * **Pulp & Paper Machinery:** Guide rolls, felt rolls, and doctor blades where corrosion from process chemicals and abrasive wear coexist. * **High-Corrosion Industrial Machinery:** Linear guide shafts, ball screw nuts, and tie-rods in environments with high humidity, chemical exposure, or washdowns (e.g., food processing with aggressive cleaners). * **Architectural & High-Traffic Fixtures:** For luxury or extreme-environment applications where a durable chrome finish is needed over a structurally strong, rust-proof core (e.g., bridge fittings, coastal facility hardware). --- ## **5. International Standards & Approvals** This is a finished product governed by standards for both substrate and coating. | Component | Standard / Specification | Notes | | :---------------- | :-------------------------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------- | | **Base Bar** | **EN 10088-3** / **EN 1.4462** (2205-type duplex).
**ASTM A276** / **UNS S32205**. | The core is a fully certifiable standard duplex grade. | | **Chromium Plate**| **ISO 6158** (Engineering chromium electroplating). | Defines coating requirements for engineering applications. | | | **DIN EN ISO 1302** (Geometrical product specifications - Indication of surface texture). | For specifying surface finish (Ra). | | **Overall Product**| **Customer Drawing & Comprehensive Technical Specification.** | The definitive document, referencing both material and plating specs. | | **Key Procurement Document** | **Schmolz + Bickenbach UGICHROM® 4462 Technical Data Sheet** and a **Detailed Purchase Order/Technical Agreement.** | Essential for defining all composite property requirements. | --- ## **Critical Technical & Procurement Note** **UGICHROM 4462 is a high-integrity engineered component, not merely a plated bar.** 1. **Precise Procurement Specification:** * **Material:** Specify **"Duplex Stainless Steel Core to EN 1.4462 / UNS S32205"**. * **Plating:** Specify **"Hard Chromium Electroplate to ISO 6158, Thickness: [X] µm min. on diameter, Hardness ≥ 800 HV"**. * **Finish & Dimensions:** Provide a drawing with **final post-plating dimensions and tolerances**. Clearly indicate surfaces to be plated. 2. **Fabrication Sequence is Crucial:** The standard process is: **1) Machine core to undersize, 2) Plate, 3) Final polish/grind (if required)**. **Any welding, bending, or heat treatment must be completed BEFORE plating.** The plating will not survive these processes. 3. **Coating Integrity for Corrosion Service:** For immersion or severe corrosion service, specify a **minimum plating thickness** (e.g., 40-50 µm) and **porosity testing**. Consider a **duplex plating process** (nickel strike under chrome) for superior adhesion and corrosion protection on the difficult-to-plate duplex substrate. 4. **Certification:** Require **two certificates**: 1) **Full MTC for the duplex bar** (chemistry, mechanicals, possibly impact tests), and 2) **Plating Process Certificate** (batch records for cleaning/plating cycles, thickness measurement reports, adhesion test results). 5. **Alternative Solutions:** If the application involves **impact, bending, or requires weld repair in service**, a **through-hardened material** (e.g., precipitation-hardening stainless steel) or a **wear-resistant thermal spray coating** applied after final machining may be more suitable than a brittle electroplate. -:- For detailed product information, please contact sales. -: Schmolz + Bickenbach UGICHROM 4462 Duplex Chrome Plated Bar Specification Dimensions Size： Diameter 20-1000 mm Length <7309 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 4462 Duplex Chrome Plated Bar Properties -:- For detailed product information, please contact sales. -:

Applications of Schmolz + Bickenbach UGICHROM 4462 Duplex Chrome Plated Bar -:- For detailed product information, please contact sales. -: Chemical Identifiers Schmolz + Bickenbach UGICHROM 4462 Duplex Chrome Plated Bar -:- For detailed product information, please contact sales. -:

Packing of Schmolz + Bickenbach UGICHROM 4462 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 3780 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