Alloy C,Brightray C,，EFORU

### **Alloy C / Brightray® C (UNS N10002) - Technical Datasheet** --- #### **1. Overview** **Alloy C**, commercially known as **Brightray® C**, is a nickel-chromium-molybdenum alloy designed for high-temperature resistance and excellent corrosion resistance in both oxidizing and reducing environments. This alloy represents an evolution in nickel-based superalloys, offering improved performance over earlier materials while maintaining good fabricability and mechanical properties. --- #### **2. Chemical Composition (Weight %)** The composition balances corrosion resistance with high-temperature capability. | Element | Content (%) | Role & Benefit | |---------|-------------|----------------| | **Nickel (Ni)** | Balance | Austenitic matrix providing fundamental corrosion resistance | | **Chromium (Cr)** | 14.5 - 16.5 | Resistance to oxidizing environments and high-temperature corrosion | | **Molybdenum (Mo)** | 15.0 - 17.0 | Resistance to reducing environments and pitting corrosion | | **Iron (Fe)** | 4.0 - 7.0 | Controlled for optimal corrosion balance | | **Tungsten (W)** | 3.0 - 4.5 | Solid solution strengthening and pitting resistance enhancement | | **Manganese (Mn)** | ≤ 1.0 | Deoxidizer and hot workability agent | | **Silicon (Si)** | ≤ 1.0 | Oxidation resistance and deoxidizer | | **Vanadium (V)** | ≤ 0.35 | Controlled impurity | | **Cobalt (Co)** | ≤ 2.5 | Controlled residual element | | **Carbon (C)** | ≤ 0.08 | Controlled for optimal strength and corrosion resistance | | **Sulfur (S)** | ≤ 0.030 | Controlled impurity | *Note: "Brightray" is a registered trademark of Rolled Alloys* --- #### **3. Physical Properties** The physical properties support high-temperature applications. | Property | Value | |----------|-------| | **Density** | 8.94 g/cm³ (0.323 lb/in³) | | **Melting Point** | 1325-1370°C (2415-2500°F) | | **Specific Heat (20°C)** | 405 J/kg·K | | **Thermal Conductivity** | 10.9 W/m·K (at 20°C) | | **Mean Coefficient of Thermal Expansion** | 11.5 × 10⁻⁶/°C (20-300°C) | | **Electrical Resistivity** | 1.25 μΩ·m | | **Modulus of Elasticity** | 205 GPa (29.7 × 10⁶ psi) | | **Magnetic Permeability** | Essentially non-magnetic | --- #### **4. Mechanical Properties** The alloy maintains strength across a wide temperature range. **Annealed Condition:** | Property | Value | |----------|-------| | **Tensile Strength** | 725-895 MPa (105-130 ksi) | | **Yield Strength (0.2% Offset)** | 345-485 MPa (50-70 ksi) | | **Elongation** | 35-45% | | **Hardness** | 90-105 HRB | **Elevated Temperature Properties (650°C/1200°F):** | Property | Value | |----------|-------| | **Tensile Strength** | 485 MPa (70 ksi) | | **Yield Strength** | 310 MPa (45 ksi) | | **Creep Strength** | 150 MPa (22 ksi) | --- #### **5. Product Applications** **Alloy C** serves in demanding high-temperature and corrosive environments: - **High-Temperature Applications:** - Industrial furnace components - Heat treatment fixtures - Radiant heating tubes - Thermocouple protection sheaths - **Chemical Processing:** - Reactor vessels for mixed acid service - Heat exchangers in corrosive media - Piping systems for chemical transfer - Evaporator and distillation components - **Aerospace Industry:** - Jet engine components - Afterburner parts - Exhaust system components - Turbine seals and rings - **Power Generation:** - Gas turbine components - Heat recovery systems - Boiler components in corrosive environments - Flue gas ducting systems - **Industrial Heating:** - Electrical heating elements - Heating element support systems - High-temperature fasteners - Thermal processing equipment --- #### **6. International Standards** The material meets various international specifications: | Standard | Specification | |----------|---------------| | **ASTM** | ASTM B435 - UNS N10002 Plate, Sheet, and Strip
ASTM B572 - UNS N10002 Rod
ASTM B619 - UNS N10002 Welded Pipe | | **UNS** | UNS N10002 | | **ASME** | SB-435, SB-572, SB-619 | | **DIN** | DIN 17742 - NiCr15Mo | | **EN** | EN 10095 - NW 12 | | **ISO** | ISO 6208 - NiCr15Mo | --- #### **7. Corrosion Resistance** - **Excellent** resistance to both oxidizing and reducing environments - **Outstanding** performance in mixed acid media - **Good** resistance to pitting and crevice corrosion - **Excellent** resistance to chloride-induced stress corrosion cracking - **Good** oxidation resistance up to 1150°C (2100°F) --- #### **8. Fabrication Characteristics** - **Machining:** Requires rigid setups and sharp cutting tools - **Welding:** Good weldability using GTAW with matching filler metal - **Forming:** Good hot working characteristics; fair cold forming - **Heat Treatment:** Solution anneal at 1150-1200°C (2100-2190°F) - **Aging:** Can be aged for optimal properties at 650-750°C (1200-1380°F) --- #### **9. Special Considerations** - **Temperature Limits:** Continuous service to 1150°C (2100°F) - **Oxidation Resistance:** Forms protective chromium oxide scale - **Thermal Stability:** Resistant to sigma phase formation - **Environmental Versatility:** Performs well in both oxidizing and reducing atmospheres --- #### **10. Summary** **Alloy C (Brightray® C / UNS N10002)** represents a versatile nickel-chromium-molybdenum alloy engineered for severe high-temperature and corrosive environments. Its balanced composition provides exceptional resistance to both oxidizing and reducing media while maintaining excellent mechanical properties at elevated temperatures. The alloy's combination of chromium for oxidation resistance and molybdenum for reducing environment protection makes it suitable for a wide range of demanding applications. Governed by comprehensive international standards including ASTM B435 and B572, Alloy C remains a preferred material for critical components in chemical processing, aerospace, power generation, and high-temperature industrial applications where reliability and performance are paramount.

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 1715 gallon liquid totes Special package is available on request.