INCOLOY Alloy 945 Nickel-Iron-Chromium Alloy,NACE MR0175 / ISO 15156-3，1

### **Product Introduction: INCOLOY® Alloy 945 Nickel-Iron-Chromium Alloy** **INCOLOY® Alloy 945** is a precipitation-hardenable nickel-iron-chromium alloy specifically engineered for superior performance in severe oil and gas applications, particularly in sour service environments containing H₂S and CO₂. This advanced alloy is approved under NACE MR0175/ISO 15156-3 standards, making it particularly suitable for critical components in demanding downhole and surface applications where resistance to sulfide stress cracking and chloride stress corrosion cracking is paramount. The alloy's optimized composition provides an excellent combination of high strength, excellent corrosion resistance, and good mechanical properties, making it ideal for applications in deep wells, high-pressure/high-temperature (HPHT) environments, and aggressive sour service conditions. --- ### **Chemical Composition** | Element | Content (%) | |---------|-------------| | **Nickel (Ni)** | 44.0 - 46.0 | | **Chromium (Cr)** | 19.5 - 23.0 | | **Iron (Fe)** | Balance | | **Molybdenum (Mo)** | 2.5 - 4.0 | | **Niobium (Nb)** | 2.5 - 4.0 | | **Titanium (Ti)** | 1.1 - 1.7 | | **Copper (Cu)** | 0.5 - 1.5 | | **Aluminum (Al)** | 0.2 - 0.4 | | **Carbon (C)** | 0.03 max | | **Manganese (Mn)** | 0.5 max | | **Silicon (Si)** | 0.2 max | | **Sulfur (S)** | 0.01 max | --- ### **Physical Properties** | Property | Value | |----------|-------| | **Density** | 8.10 g/cm³ | | **Melting Point** | 1350 - 1400 °C | | **Thermal Conductivity** | 11.5 W/m·K (at 20°C) | | **Electrical Resistivity** | 1.05 μΩ·m | | **Modulus of Elasticity** | 195 GPa | | **Coefficient of Thermal Expansion** | 13.8 μm/m·°C (20-300°C) | | **Specific Heat Capacity** | 460 J/kg·K | | **Magnetic Response** | Essentially non-magnetic | --- ### **Mechanical Properties** **Solution Annealed Condition:** - **Tensile Strength:** 690 - 860 MPa - **Yield Strength (0.2% Offset):** 310 - 480 MPa - **Elongation:** 35 - 45% - **Hardness:** 200 - 250 HB **Aged Condition:** - **Tensile Strength:** 1030 - 1240 MPa - **Yield Strength (0.2% Offset):** 760 - 930 MPa - **Elongation:** 18 - 25% - **Hardness:** 280 - 350 HB --- ### **Key Characteristics & Advantages** 1. **Exceptional Corrosion Resistance** - Superior resistance to sulfide stress cracking (SSC) - Excellent chloride stress corrosion cracking (SCC) resistance - Good performance in CO₂ and H₂S environments 2. **NACE MR0175/ISO 15156-3 Compliance** - Fully approved for sour service applications - Suitable for severe H₂S-containing environments - Meets stringent oil and gas industry requirements 3. **High Strength Capability** - Excellent strength-to-weight ratio - Good mechanical properties at elevated temperatures - Superior fatigue and wear resistance 4. **Excellent Fabricability** - Good weldability using conventional methods - Suitable for hot and cold working operations - Can be machined using standard techniques --- ### **Product Applications** **Oil and Gas Industry:** - Downhole tubing and casing - Wellhead components - Christmas tree equipment - Valve bodies and trim - Pump shafts and impellers **Sour Service Applications:** - Production strings in H₂S environments - Surface equipment in sour fields - HPHT well components - Corrosion-resistant alloys (CRA) completions **Industrial Applications:** - Chemical processing equipment - Fasteners and bolting in corrosive environments - Marine and offshore components - Power generation equipment --- ### **International Standards** | Standard Type | Standard Number | Description | |---------------|-----------------|-------------| | **NACE** | MR0175/ISO 15156-3 | Sour Service Compliance | | **ASTM** | B805 | Bar and Billet Specification | | **API** | 6A/17D | Oilfield Equipment Standards | | **ASME** | SB-805 | Code Cases | --- ### **Summary** **INCOLOY® Alloy 945** represents a significant advancement in nickel-iron-chromium alloy technology, specifically designed to meet the demanding requirements of modern oil and gas production, particularly in sour service environments. Its compliance with **NACE MR0175/ISO 15156-3** standards ensures reliable performance in H₂S-containing environments, while its optimized composition provides an excellent balance of high strength, superior corrosion resistance, and good fabricability. The alloy's precipitation-hardening capability allows for significant strength enhancement while maintaining excellent resistance to sulfide stress cracking and chloride-induced corrosion. Comprehensive certification to international standards including NACE, ASTM, and API specifications guarantees consistent quality and performance, providing engineers with a trusted material solution for the most challenging oilfield applications where both mechanical integrity and corrosion resistance are essential for safety and operational reliability.

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 3355 gallon liquid totes Special package is available on request.