Alloy 188,Haynes 188 Wire,UNS R30188,E FORU

British Specs:，American Specs: AMS 5608 Sheet, Strip and Plate AMS 5801 Welding Wire，German Specs:

### **Product Technical Specification: Alloy 188 (Haynes 188 Wire / UNS R30188)** --- #### **1. Product Overview** **Alloy 188** (commercially known as **Haynes 188**, UNS R30188) wire products represent the drawn form of this premium cobalt-chromium-nickel-tungsten superalloy, offering exceptional high-temperature performance in continuous linear form. These wire products maintain the alloy's characteristic oxidation resistance, strength retention, and thermal stability while providing versatility for fabrication and assembly processes. Available in diameters from 0.1 mm (0.004") to 6.0 mm (0.250"), Haynes 188 wire serves critical functions in welding, fastening, and component manufacturing for extreme temperature applications up to 1100°C (2000°F). The wire form is particularly valued for its consistent dimensional accuracy, surface quality, and mechanical properties, making it suitable for automated manufacturing processes and precision applications. --- #### **2. Chemical Composition (Weight %)** | Element | Content (%) | Metallurgical Function | | :--- | :--- | :--- | | **Cobalt (Co)** | Balance | Matrix element providing high-temperature strength and thermal fatigue resistance | | **Chromium (Cr)** | 20.0 - 24.0 | Forms protective chromium oxide scale for oxidation resistance | | **Nickel (Ni)** | 20.0 - 24.0 | Stabilizes austenitic structure and enhances drawability | | **Tungsten (W)** | 13.0 - 15.0 | Primary solid solution strengthener for creep resistance | | **Iron (Fe)** | ≤ 3.0 | Residual element | | **Lanthanum (La)** | 0.03 - 0.12 | Improves oxide scale adhesion under thermal cycling | | **Manganese (Mn)**| ≤ 1.25 | Enhances hot workability and controls sulfur | | **Silicon (Si)** | ≤ 0.20 | Residual element | | **Carbon (C)** | 0.05 - 0.15 | Strength enhancement through carbide formation | | **Boron (B)** | ≤ 0.015 | Grain boundary strengthening element | --- #### **3. Physical Properties** | Property | Value | Condition | | :--- | :--- | :--- | | **Density** | 9.13 g/cm³ | 25°C | | **Melting Range** | 1330-1380°C | Liquidus-Solidus | | **Electrical Resistivity** | 1.02 μΩ·m | 25°C | | **Thermal Conductivity** | 10.1 W/m·K | 100°C | | **Thermal Expansion Coefficient** | 12.3 μm/m·°C | 20-100°C | | **Magnetic Permeability** | <1.01 | Annealed condition | --- #### **4. Mechanical Properties** **Standard Wire Properties (Annealed Condition):** *Diameter Range: 0.1-6.0 mm (0.004-0.250")* - **Tensile Strength:** 895-1100 MPa (130-160 ksi) - **Yield Strength (0.2% Offset):** 415-550 MPa (60-80 ksi) - **Elongation:** 35-50% (in 50 mm) - **Hardness:** 70-90 HRB **Special Tempers Available:** - **Soft Annealed:** Maximum formability and ductility - **Half-Hard:** Balanced strength and formability - **Full-Hard:** Maximum strength for spring applications **Elevated Temperature Performance:** - **Continuous Service:** Up to 1100°C (2000°F) - **Stress Rupture Strength:** 48 MPa @ 980°C/100 hours - **Creep Resistance:** Excellent maintenance of properties under load --- #### **5. Available Forms & Specifications** **Standard Diameter Tolerances:** - **Fine Wire:** 0.1-1.0 mm (± 0.005 mm) - **Medium Wire:** 1.0-3.0 mm (± 0.01 mm) - **Heavy Wire:** 3.0-6.0 mm (± 0.02 mm) **Standard Packaging:** - **Spools:** 5-100 kg, plastic or wooden cores - **Coils:** 10-50 kg, protected against deformation - **Straight Lengths:** 1-3 meters, bundled and protected **Surface Conditions:** - **Bright Finish:** Smooth, oxide-free surface - **Pickled Finish:** Matte surface for improved adhesion - **Coated Variants:** Special coatings available --- #### **6. Product Applications** **Welding & Fabrication:** - **Welding Electrodes:** For joining cobalt and nickel-based superalloys - **Weld Wire:** GTAW, GMAW, and SAW processes - **Cladding Applications:** Surface protection of less resistant materials - **Repair & Maintenance:** Component repair in aerospace and power generation **Fastening & Assembly:** - **High-Temperature Fasteners:** Wire-formed pins, clips, and retainers - **Springs & Lock Washers:** For elevated temperature service - **Safety Wiring:** Critical aerospace and racing applications - **Threaded Components:** High-temperature bolts and screws **Industrial Components:** - **Mesh & Screening:** High-temperature filtration and separation - **Heating Elements:** Support wires and resistance elements - **Thermocouple Wires:** Sheath and extension wire applications - **Furnace Components:** Hangers, hooks, and support systems **Specialized Applications:** - **Medical Devices:** Surgical instruments and implants - **Aerospace Controls:** Control cable assemblies - **Nuclear Applications:** Component fabrication and maintenance --- #### **7. International Standards** | Standard Type | Standard Number | Specification | | :--- | :--- | :--- | | **Unified Numbering System** | **UNS R30188** | Material designation | | **ASTM International** | **ASTM B572** | Rod and Bar (wire applications) | | **AWS Specification** | **AWS A5.13** | Welding Electrode and Rod Specification | | **Aerospace Material** | **AMS 5803** | Bar, Forgings, and Rings (wire raw material) | | **Military Standard** | **MIL-DTL-5066** | Wire, Welding, Covered, Cobalt Base | | **European Standard** | **2.4684** | Material number designation | | **Dimensional Standards** | **ASTM B258** | Standard sizes for wire products | --- #### **8. Fabrication Characteristics** **Forming & Processing:** - **Cold Forming:** Excellent in annealed condition - **Springback:** Predictable and consistent - **Weldability:** Excellent with matching filler metal - **Machinability:** Good with proper techniques and tooling **Heat Treatment:** - **Solution Annealing:** 1230°C (2250°F) with rapid cooling - **Stress Relieving:** 870-900°C (1600-1650°F) as required - **Aging Treatments:** Available for specific property enhancement **Surface Preparation:** - **Cleaning:** Degreasing and pickling standard - **Surface Finish:** Controlled for specific applications - **Coating:** Special coatings available for enhanced performance --- #### **9. Quality Assurance** **Standard Testing:** - **Dimensional Verification:** Laser micrometer inspection - **Surface Quality:** Visual and microscopic examination - **Chemical Analysis:** Spectrographic verification by heat lot - **Mechanical Testing:** Tensile and wrap testing per lot **Special Testing Available:** - **Weld Testing:** Deposit chemistry and mechanical properties - **High-Temperature Testing:** Creep and stress rupture evaluation - **Metallographic Examination:** Grain structure and inclusion assessment - **Non-Destructive Testing:** ET, UT as specified --- #### **Technical Summary** **Haynes 188 Wire (UNS R30188)** provides the exceptional high-temperature capabilities of this cobalt-based superalloy in a versatile linear form suitable for fabrication, assembly, and joining applications. The wire maintains the alloy's superior oxidation resistance, thermal stability, and mechanical properties while offering the formability and consistency required for modern manufacturing processes. Available in various diameters, tempers, and surface conditions, Haynes 188 wire enables reliable performance in the most demanding aerospace, industrial, and energy applications where conventional materials cannot survive the extreme operating conditions.

Packing of Standard Packing: 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 2234 gallon liquid totes Special package is available on request.