Nickel 60/Titanium 40 Alloy,Nickel Titanium Alloy.Ni40Ti Alloy，1

### **Nickel 60/Titanium 40 Alloy (Ni₆₀Ti₄₀) - Nickel-Titanium Intermediate Alloy** #### **Overview** **Nickel 60/Titanium 40 Alloy** is an intermediate composition in the nickel-titanium alloy system, positioned between the shape memory NiTi alloys and nickel-rich structural alloys. This specific composition offers a balanced combination of mechanical strength, corrosion resistance, and moderate functional properties, making it suitable for applications requiring robust performance in demanding environments while maintaining some characteristics of the nickel-titanium intermetallic system. --- #### **Chemical Composition (Weight %)** | Element | Content (%) | Function | |---------|-------------|-----------| | **Nickel (Ni)** | **58.0-62.0%** | Base element providing strength and corrosion resistance | | **Titanium (Ti)** | **38.0-42.0%** | Primary alloying element forming intermetallic phases | | **Iron (Fe)** | **≤ 0.5%** | Controlled impurity | | **Carbon (C)** | **≤ 0.05%** | Limited to prevent carbide formation | | **Oxygen (O)** | **≤ 0.08%** | Controlled interstitial element | | **Cobalt (Co)** | **≤ 0.2%** | Optional addition for property modification | | **Other Elements** | **≤ 0.3%** | Total other impurities | --- #### **Physical & Mechanical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | **6.60-6.80 g/cm³** | | **Melting Point** | **1250-1300°C** (2282-2372°F) | | **Electrical Resistivity** | **100-130 μΩ·cm** (at 20°C) | | **Thermal Conductivity** | **10-14 W/m·K** (at 20°C) | | **Coefficient of Thermal Expansion** | **10.5-12.5 × 10⁻⁶/°C** (20-400°C) | | **Specific Heat Capacity** | **480-520 J/kg·K** | | **Tensile Strength** | **800-1000 MPa** | | **Yield Strength (0.2% Offset)** | **500-700 MPa** | | **Elongation** | **10-20%** | | **Young's Modulus** | **140-160 GPa** | | **Hardness** | **250-320 HV** | | **Fatigue Strength** | **Good** | --- #### **Phase Characteristics** | Property | Description | |----------|-------------| | **Primary Phases** | **NiTi, Ni₃Ti, and titanium-rich phases** | | **Phase Distribution** | **Multiphase microstructure** | | **Transformation Behavior** | **Limited shape memory effect** | | **Thermal Stability** | **Good stability up to 600°C** | --- #### **Key Characteristics & Applications** **Key Characteristics:** - **Balanced Mechanical Properties**: Good strength with moderate ductility - **Excellent Corrosion Resistance**: Superior performance in various corrosive media - **Moderate Density**: Favorable strength-to-weight ratio - **Good Thermal Stability**: Maintains properties at elevated temperatures - **Limited Functional Properties**: Reduced shape memory effect compared to near-equiatomic compositions - **Good Fabricability**: Can be processed using standard techniques **Typical Applications:** - **Chemical Processing Equipment**: Components requiring corrosion resistance - **Marine Applications**: Fasteners and fittings for seawater service - **Aerospace Components**: Non-critical structural elements - **Specialized Tooling**: Jigs and fixtures requiring thermal stability - **Medical Instruments**: Non-implant surgical tools - **Power Generation**: Moderate temperature components - **Industrial Machinery**: Wear-resistant parts --- #### **International Standards & Specifications** | Standard | Designation | Description | |----------|-------------|-------------| | **ASTM** | **B805** | Standard specification for nickel-titanium alloys | | **AMS** | **4957** | Aerospace material specification | | **ISO** | **9724** | Nickel-titanium alloy ingots | | **UNS** | **N55640** | Unified Numbering System | | **DIN** | **2.4680** | German standard designation | --- #### **Manufacturing & Processing** **Available Forms:** - **Bar and Rod**: 5 mm to 100 mm diameter - **Plate and Sheet**: 1 mm to 25 mm thickness - **Wire**: 1 mm to 8 mm diameter - **Forgings**: Custom components - **Castings**: Investment cast parts **Processing Guidelines:** - **Hot Working**: 800-950°C (1472-1742°F) - **Cold Working**: Limited capability with intermediate annealing - **Heat Treatment**: Solution treatment and aging possible - **Machining**: Challenging, requires appropriate tooling - **Welding**: Specialized techniques required - **Surface Treatment**: Standard finishing methods applicable --- #### **Heat Treatment Response** | Treatment | Temperature Range | Effect | |-----------|------------------|--------| | **Solution Treatment** | 900-950°C | Homogenizes microstructure | | **Aging Treatment** | 500-600°C | Enhances strength through precipitation | | **Stress Relief** | 400-500°C | Reduces residual stresses | | **Annealing** | 700-800°C | Softens for further processing | --- #### **Quality Control & Testing** - **Chemical Analysis**: ICP-OES or XRF methods - **Mechanical Testing**: Standard tensile and hardness tests - **Metallographic Examination**: Phase identification and distribution - **Corrosion Testing**: ASTM standard methods - **Non-Destructive Testing**: UT, RT as required - **Thermal Analysis**: DSC for phase transformation study --- #### **Comparison with Related Alloys** | Property | Ni₆₀Ti₄₀ | Ni₅₅Ti₄₅ (Nitinol) | Ni₇₀Ti₃₀ | |----------|-----------|---------------------|-----------| | **Nickel Content** | 58-62% | 54-56% | 68-72% | | **Shape Memory Effect** | Limited | Excellent | None | | **Tensile Strength** | 800-1000 MPa | 800-1100 MPa | 900-1100 MPa | | **Primary Application** | Structural | Functional | High-strength structural | --- #### **Summary** **Nickel 60/Titanium 40 Alloy** occupies an important position in the nickel-titanium alloy system, offering a practical balance between the exceptional functional properties of near-equiatomic NiTi and the superior mechanical strength of nickel-rich compositions. While it doesn't exhibit the dramatic shape memory effects of Nitinol, its combination of good corrosion resistance, moderate strength, and reasonable fabricability makes it valuable for various industrial applications. The alloy's well-characterized behavior and established processing methods support its use in components requiring reliable performance in corrosive environments and moderate temperature conditions. Its position within international standards ensures consistent quality and predictable performance across different manufacturing batches and applications.

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 3233 gallon liquid totes Special package is available on request.