C 601 Nickel-Chromium-Iron Alloy,UNS N06601,E FORU

### **Product Introduction: C-601 Nickel-Chromium-Iron Alloy (UNS N06601)** **C-601 Nickel-Chromium-Iron Alloy (UNS N06601)** is a nickel-chromium-iron-aluminum alloy specifically engineered for exceptional high-temperature oxidation resistance and superior strength at elevated temperatures. This solid-solution strengthened alloy offers outstanding performance in temperatures up to 1250°C (2282°F), making it particularly suitable for applications in industrial heating, thermal processing, and high-temperature environments where conventional alloys may fail. The controlled addition of aluminum enables the formation of a highly protective, adherent oxide scale that provides remarkable resistance to cyclic oxidation and carburization. The alloy maintains excellent structural stability and mechanical integrity under prolonged exposure to extreme temperatures, establishing it as a premier choice for demanding thermal processing applications across various industries. --- #### **1. Chemical Composition (Weight %)** The chemical composition of C-601 Nickel-Chromium-Iron Alloy per UNS N06601 is as follows: | Element | Content (%) | Element | Content (%) | |---------|-------------|---------|-------------| | **Nickel (Ni)** | 58.0 - 63.0 | **Chromium (Cr)** | 21.0 - 25.0 | | **Iron (Fe)** | 8.0 - 11.0 | **Aluminum (Al)** | 1.0 - 1.7 | | **Carbon (C)** | 0.10 max | **Manganese (Mn)** | 1.0 max | | **Silicon (Si)** | 0.50 max | **Copper (Cu)** | 1.0 max | | **Sulfur (S)** | 0.015 max | **Titanium (Ti)** | 0.15 - 0.60 | --- #### **2. Physical & Mechanical Properties** **Physical Properties:** | Property | Metric Units | Imperial Units | |----------|-----------------|------| | **Density** | 8.11 g/cm³ | 0.293 lb/in³ | | **Melting Range** | 1300 - 1360 °C | 2372 - 2480 °F | | **Thermal Conductivity** | 11.5 W/m·K | 79.7 Btu·in/hr·ft²·°F | | **Coefficient of Thermal Expansion** | 14.2 μm/m·°C | 7.9 μin/in·°F | | **Specific Heat** | 455 J/kg·K | 0.109 Btu/lb·°F | | **Electrical Resistivity** | 1.18 μΩ·m | - | | **Modulus of Elasticity** | 214 GPa | 31.0 x 10⁶ psi | **Mechanical Properties (Annealed Condition):** | Property | Value | |----------|-----------------| | **Tensile Strength** | 655 MPa | 95 ksi | | **Yield Strength (0.2% Offset)** | 310 MPa | 45 ksi | | **Elongation** | 45% | | **Hardness (Rockwell B)** | 85 HRB | **Elevated Temperature Properties (at 980°C/1800°F):** | **Tensile Strength** | 70 MPa | 10 ksi | | **Creep Rupture Strength (1000h)** | 25 MPa | 3.6 ksi | --- #### **3. Key Characteristics & Product Applications** **Key Characteristics:** - **Exceptional Oxidation Resistance**: Outstanding performance in temperatures up to 1250°C (2282°F) - **Cyclic Oxidation Resistance**: Excellent resistance to spalling and scale formation under thermal cycling - **Carburization Resistance**: Maintains integrity in carburizing atmospheres - **Sulfidation Resistance**: Good performance in sulfur-containing environments - **Chloride Corrosion Resistance**: Resists attack from chloride compounds at elevated temperatures - **Excellent Fabricability**: Good weldability and formability using standard techniques **Product Applications:** C-601 Nickel-Chromium-Iron Alloy serves critical roles in high-temperature applications: - **Industrial Heating & Thermal Processing**: - Radiant tubes and furnace muffles - Heat treatment fixtures and baskets - Roller hearth furnace rollers - Annealing covers and retorts - **Aerospace & Gas Turbines**: - Combustion cans and liners - Afterburner components - Turbine seals and rings - Exhaust system components - **Power Generation**: - Heat recovery steam generator components - Thermal oxidizer systems - Waste incineration systems - Boiler components - **Chemical Processing**: - Catalyst support grids - Reformer tubes and components - High-temperature reactor internals - Process heating elements --- #### **4. International Standards & Specifications** C-601 Nickel-Chromium-Iron Alloy complies with the following international standards: **Primary Specifications:** - **UNS N06601**: Unified Numbering System - **ASTM B168**: Plate, Sheet, and Strip - **ASTM B166**: Rod, Bar, and Wire - **ASTM B167**: Seamless Pipe and Tube - **AMS 5715**: Bars, Forgings, and Rings **International Equivalents:** - **EN**: 2.4851 (NiCr23Fe) - **DIN**: 2.4851 - **JIS**: NW 6601 - **ISO**: 6207 (NW 6601) - **ASME**: SB-168, SB-166, SB-167 --- #### **Summary of Key Advantages** - **Superior High-Temperature Capability**: Excellent oxidation resistance up to 1250°C (2282°F) - **Exceptional Thermal Stability**: Maintains mechanical properties under prolonged high-temperature exposure - **Versatile Corrosion Resistance**: Performs well in oxidizing, carburizing, and sulfidizing environments - **Proven Reliability**: Extensive successful service history in extreme thermal conditions - **Excellent Fabricability**: Good weldability and formability for complex component manufacturing - **Comprehensive Standardization**: Covered by complete suite of international specifications **Technical Note**: C-601 Nickel-Chromium-Iron Alloy exhibits excellent weldability using GTAW, GMAW, and SMAW processes with matching filler metals. The alloy demonstrates good hot workability in the temperature range of 870-1230°C (1600-2250°F). For cold working, intermediate annealing at 1010-1175°C (1850-2150°F) is recommended. The material's exceptional oxidation resistance is attributed to the formation of a continuous, adherent chromium-aluminum oxide scale that provides long-term protection in high-temperature service. Proper cleaning and handling procedures should be maintained to prevent surface contamination that could affect high-temperature 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 3189 gallon liquid totes Special package is available on request.