Nickel 70/Titanium 30 Alloy,Nickel Titanium Alloy.Ni30Ti Alloy，1

### **Nickel 70/Titanium 30 Alloy (Ni₇₀Ti₃₀) - High-Strength Nickel-Titanium Alloy** #### **Overview** **Nickel 70/Titanium 30 Alloy** is a high-nickel variant of nickel-titanium alloys that offers enhanced strength and corrosion resistance while maintaining some functional properties of the nickel-titanium system. With its titanium content of approximately 30%, this alloy exhibits excellent mechanical properties, good corrosion resistance, and unique phase transformation characteristics that make it suitable for specialized applications in aerospace, chemical processing, and advanced manufacturing industries. --- #### **Chemical Composition (Weight %)** | Element | Content (%) | Function | |---------|-------------|-----------| | **Nickel (Ni)** | **68.0-72.0%** | Base element providing strength and corrosion resistance | | **Titanium (Ti)** | **28.0-32.0%** | Primary alloying element for intermetallic formation | | **Iron (Fe)** | **≤ 0.5%** | Controlled impurity | | **Carbon (C)** | **≤ 0.08%** | Limited to prevent carbide formation | | **Oxygen (O)** | **≤ 0.05%** | Strictly controlled interstitial element | | **Nitrogen (N)** | **≤ 0.05%** | Controlled impurity | | **Other Elements** | **≤ 0.3%** | Total other impurities | --- #### **Physical & Mechanical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | **7.20-7.40 g/cm³** | | **Melting Point** | **1300-1350°C** (2372-2462°F) | | **Electrical Resistivity** | **90-110 μΩ·cm** (at 20°C) | | **Thermal Conductivity** | **12-16 W/m·K** (at 20°C) | | **Coefficient of Thermal Expansion** | **11.0-13.0 × 10⁻⁶/°C** (20-400°C) | | **Specific Heat Capacity** | **450-500 J/kg·K** | | **Tensile Strength** | **900-1100 MPa** (annealed condition) | | **Yield Strength (0.2% Offset)** | **600-800 MPa** (annealed condition) | | **Elongation** | **15-25%** (annealed condition) | | **Young's Modulus** | **160-180 GPa** | | **Hardness** | **280-350 HV** | | **Fatigue Strength** | **Excellent** | --- #### **Phase Transformation Characteristics** | Property | Value / Description | |----------|---------------------| | **Primary Phases** | **Ni₃Ti, NiTi, and nickel-rich solid solution** | | **Transformation Temperature** | **Variable with heat treatment** | | **Phase Stability** | **Excellent thermal stability** | | **Aging Response** | **Significant strengthening through precipitation** | --- #### **Key Characteristics & Applications** **Key Characteristics:** - **High Strength-to-Weight Ratio**: Excellent mechanical properties with moderate density - **Good Corrosion Resistance**: Superior to many stainless steels in chloride environments - **Controlled Phase Transformations**: Adjustable properties through heat treatment - **Excellent Fatigue Resistance**: Suitable for dynamic load applications - **Good Elevated Temperature Performance**: Maintains properties at moderate temperatures - **Precipitation Hardenable**: Can be strengthened through aging treatments **Typical Applications:** - **Aerospace Components**: Fasteners, springs, and structural elements - **Chemical Processing**: Valves, pumps, and fittings for corrosive service - **Marine Engineering**: Components exposed to seawater environments - **Medical Instruments**: Surgical tools and specialized equipment - **Automotive Applications**: High-performance engine components - **Power Generation**: Turbine blades and high-temperature fixtures - **Specialized Fasteners**: Corrosion-resistant bolts and connectors --- #### **International Standards & Specifications** | Standard | Designation | Description | |----------|-------------|-------------| | **ASTM** | **F2063** | Standard specification for wrought nickel-titanium alloys | | **AMS** | **4956** | Aerospace material specification for nickel-titanium alloys | | **ISO** | **5832-11** | Implants for surgery - metallic materials | | **UNS** | **N55710** | Unified Numbering System designation | | **DIN** | **2.4685** | German standard designation | --- #### **Manufacturing & Processing** **Available Forms:** - **Bar and Rod**: 3 mm to 150 mm diameter - **Wire**: 0.5 mm to 10 mm diameter - **Sheet and Strip**: 0.1 mm to 6 mm thickness - **Forgings**: Custom shapes and components - **Powder**: For additive manufacturing and coatings **Processing Guidelines:** - **Hot Working**: 850-950°C (1562-1742°F) with controlled cooling - **Cold Working**: Moderate capability with intermediate annealing - **Solution Treatment**: 950-1000°C (1742-1832°F) followed by rapid cooling - **Aging Treatment**: 500-600°C (932-1112°F) for precipitation strengthening - **Machining**: Requires appropriate tools and techniques - **Welding**: Possible with specialized procedures --- #### **Heat Treatment Response** | Treatment | Effect on Properties | |-----------|---------------------| | **Solution Annealing** | Produces uniform microstructure for subsequent aging | | **Aging at 500-550°C** | Develops maximum strength through Ni₃Ti precipitation | | **Overaging** | Improves toughness with some strength reduction | | **Stress Relief** | Reduces residual stresses from manufacturing | --- #### **Quality Control & Testing** - **Chemical Analysis**: Verification of nickel and titanium content - **Mechanical Testing**: Tensile, hardness, and impact testing - **Metallographic Examination**: Phase identification and microstructure analysis - **Corrosion Testing**: Performance in various corrosive environments - **Non-Destructive Testing**: UT, RT, and ET as required - **Thermal Analysis**: DSC for phase transformation characterization --- #### **Comparison with Related Alloys** | Property | Ni₇₀Ti₃₀ | Ni₅₅Ti₄₅ (Nitinol) | Ti-6Al-4V | |----------|-----------|---------------------|-----------| | **Density** | 7.2-7.4 g/cm³ | 6.4-6.5 g/cm³ | 4.43 g/cm³ | | **Tensile Strength** | 900-1100 MPa | 800-1100 MPa | 900-1100 MPa | | **Corrosion Resistance** | Excellent | Excellent | Excellent | | **Shape Memory Effect** | Limited | Excellent | None | --- #### **Summary** **Nickel 70/Titanium 30 Alloy** represents a high-strength member of the nickel-titanium alloy family, offering an excellent combination of mechanical properties, corrosion resistance, and thermal stability. While it doesn't exhibit the dramatic shape memory effects of near-equiatomic nickel-titanium alloys, its superior strength, excellent fatigue resistance, and good corrosion performance make it valuable for demanding structural applications. The alloy's ability to be strengthened through precipitation hardening and its compatibility with standard manufacturing processes ensure its utility across aerospace, chemical processing, and specialized engineering applications. Established international standards and proven manufacturing protocols support the reliable application of this advanced material in critical components where conventional alloys may not provide adequate performance.

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 3232 gallon liquid totes Special package is available on request.