Sandvik SAF 2205SH Spring

Sandvik SAF 2205SH Spring Wire Product Information -:- For detailed product information, please contact sales. -: Sandvik SAF 2205SH Spring Wire Synonyms -:- For detailed product information, please contact sales. -:

Sandvik SAF 2205SH Spring Wire Product Information -:- For detailed product information, please contact sales. -: # **Product Name: Sandvik SAF 2205SH Spring Wire (UNS S32205 / EN 1.4462)** ## **Introduction** Sandvik SAF 2205SH Spring Wire is a premium-grade, **Super High-Strength (SH)** variant of duplex stainless steel spring wire, engineered for the most demanding **fatigue and corrosion applications**. Through an advanced thermomechanical processing route, it achieves a **remarkable combination of ultra-high tensile strength, exceptional fatigue resistance, and retained corrosion performance**. This wire is specifically designed for critical springs where maximum load capacity, miniaturization, and long-term reliability in aggressive environments are paramount, such as in subsurface safety valves, high-performance instrumentation, and severe service mechanical components. ## **Key Features** * **Ultra-High Tensile Strength:** Delivers superior tensile strength, typically in the range of **1850 - 2150 MPa**, enabling the design of exceptionally high-load or miniaturized springs compared to standard SAF 2205 spring wire. * **Optimized Fatigue Performance:** The "SH" processing refines the microstructure to enhance resistance to fatigue crack initiation and propagation under dynamic loading, which is critical for springs with high cycle life requirements. * **Maintained Corrosion Resistance:** Preserves the excellent chloride stress corrosion cracking (SCC) and pitting resistance (PREN ≥ 34) of the base SAF 2205 alloy, even at the elevated strength level. * **Superior Dimensional and Property Consistency:** Produced with extreme controls to ensure uniform properties and surface integrity, which is vital for predictable and reliable spring performance in critical safety applications. --- ## **1. Chemical Composition (Typical Weight % - Sandvik Specification)** The composition adheres to the strict UNS S32205 specification as the performance foundation. | Element | Content (%) | Element | Content (%) | | :------------- | :------------ | :------------- | :---------- | | Chromium (Cr) | 22.0 - 23.0 | Nickel (Ni) | 4.5 - 6.5 | | Molybdenum (Mo)| **3.0 - 3.5** | **Nitrogen (N)**| **0.14 - 0.20** | | Manganese (Mn) | ≤ 2.0 | Copper (Cu) | ≤ 0.20 | | Silicon (Si) | ≤ 1.0 | Carbon (C) | ≤ 0.030 | | Phosphorus (P) | ≤ 0.030 | Sulfur (S) | ≤ 0.015 | | **Iron (Fe)** | **Balance** | | | **Premium Base Alloy:** Guarantees the higher minimum Molybdenum (≥3.0%) and Nitrogen (≥0.14%) content of UNS S32205. **PREN Calculation:** PREN = %Cr + 3.3(%Mo) + 16(%N) ≥ **34** --- ## **2. Physical & Mechanical Properties (Typical for SH Temper)** *Properties are the result of proprietary cold working and thermal treatment processes.* | Property | Typical Value / Range | | :-------------------------------------------- | :------------------------------- | | Density | 7.80 g/cm³ | | **Tensile Strength (Rm)** | **1900 - 2150 MPa** (Diameter dependent) | | **Torsion Test (Number of Revolutions)** | **≥ 15** (Indicates sufficient ductility for coiling at this strength level) | | **Modulus of Elasticity (E)** | ~200 GPa | | **Shear Modulus (G)** | ~75 GPa | | **Fatigue Strength (Rotating Beam, 10⁷ cycles)**| **Significantly enhanced over standard spring temper.** (Requires application-specific testing) | | **Surface Finish:** | Premium bright finish, critically controlled for minimal surface defects. | | **Diameter Range:** | Commonly 0.10 mm to 4.0 mm for high-stress applications. | --- ## **3. Product Forms & Target Applications** **Available Product Forms:** * **Precision Coil:** On spools for automated, high-speed spring coiling machines. * **Straightened & Cut Lengths:** For specific formed wire components requiring the SH properties. * **Condition:** Supplied in the final "SH" spring temper, ready for coiling and a mandatory final stress relief. **Primary Applications (Ultra-Demanding Springs):** SAF 2205SH is reserved for the most critical spring applications where standard high-tensile wires are inadequate: * **Oil & Gas Downhole & Subsurface Safety Valves (SSSV):** Main spring or pilot springs in safety-critical valves where reliability under high pressure, H₂S, and chloride exposure is non-negotiable. * **Aerospace & Defense:** Critical springs in mechanisms exposed to corrosive atmospheres or requiring high strength-to-weight ratios. * **High-Performance Automotive (Racing, Marine):** Valve springs, clutch springs, or actuator springs in aggressive environments. * **Medical Implants & Surgical Tools:** Springs for devices requiring exceptional strength, fatigue life, and biocompatibility (subject to final validation and approval). * **Precision Instruments & Sensors:** Miniature, high-load springs in analytical or control equipment used in corrosive processes. --- ## **4. International Standards & Approvals** This is a proprietary, high-performance product typically governed by technical agreements rather than generic standards. | Standard Type | Standard Number & Designation | Notes | | :------------------ | :--------------------------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------- | | **Unified Numbering System (UNS)** | **S32205** | The base material specification for chemistry. | | **EN / EURONORM (Europe)** | **1.4462** | Standard European material number for the alloy. | | **Key Governing Document** | **Sandvik SAF 2205SH Spring Wire Technical Data Sheet & Proprietary Specification.** | The definitive source for guaranteed SH-grade properties. | | **Customer-Specific Standards** | **Technical Purchase Agreement (TPA)** incorporating requirements from **ASTM A313** (as a reference) and extensive additional testing protocols. | Procurement is always based on a detailed TPA. | --- ## **Critical Technical & Procurement Note** **SAF 2205SH is a specialist, engineered product requiring a collaborative and highly controlled approach.** 1. **Mandatory Technical Collaboration:** Procurement **must** be preceded by engineering consultation with Sandvik. A **detailed Technical Purchase Agreement (TPA)** is required, specifying: * **Exact Property Windows:** Tensile strength, torsion values, relaxation behavior. * **Stringent Surface Quality:** Micro-inclusion ratings, surface defect depth limits (e.g., per SEP 1927). * **Application-Specific Testing:** Fatigue testing under defined conditions, stress corrosion testing. * **Traceability:** Full pedigree from melt to finished wire spool. 2. **Spring Manufacturing Protocol is Critical:** * **Coiling:** Requires precision equipment. The high strength demands robust tooling and careful handling to avoid surface damage. * **Mandatory Stress Relief:** A precisely controlled **low-temperature thermal treatment** (e.g., 350-430°C for a specified time) after coiling is **absolutely essential** to stabilize the spring, relieve stresses, and optimize fatigue performance without compromising corrosion resistance. * **Shot Peening:** Highly recommended to maximize fatigue life. Parameters must be optimized for this high-strength material. 3. **Design Considerations:** Utilize the specified **Shear Modulus (G)** for accurate spring rate calculation. The ultra-high strength allows for radical miniaturization, but attention must be paid to stress concentrations and surface quality. 4. **Certification & Documentation:** Require an **extensive Sandvik Certificate of Conformity** that goes beyond standard MTC. It should include full chemical analysis, comprehensive mechanical testing results, surface quality reports, heat treatment records for the wire, and a declaration of conformity to the agreed TPA. 5. **Justification:** The use of SAF 2205SH is justified for **safety-critical or performance-critical springs** where failure consequences are severe, and where its unique property set enables a design that standard spring wires cannot achieve. It represents the top tier of corrosion-resistant spring wire technology. -:- For detailed product information, please contact sales. -: Sandvik SAF 2205SH Spring Wire Specification Dimensions Size： Diameter 20-1000 mm Length <7306 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. -: Sandvik SAF 2205SH Spring Wire Properties -:- For detailed product information, please contact sales. -:

Applications of Sandvik SAF 2205SH Spring Wire -:- For detailed product information, please contact sales. -: Chemical Identifiers Sandvik SAF 2205SH Spring Wire -:- For detailed product information, please contact sales. -:

Packing of Sandvik SAF 2205SH Spring Wire -:- 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 3777 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