330 Austenitic Alloy,Carlson Alloy 330,nickel-iron-chromium-silicon austenitic alloy,UNS N08330,E FORU

### **Product Introduction: 330 Austenitic Alloy (UNS N08330)** **330 Austenitic Alloy** (also known as Carlson Alloy 330) is a nickel-iron-chromium-silicon austenitic alloy specifically engineered for exceptional high-temperature strength and outstanding resistance to oxidation, carburization, and thermal cycling. This heat-resistant superalloy maintains excellent mechanical properties and structural stability at temperatures up to 1150°C (2100°F), making it particularly valuable for demanding high-temperature applications in industrial heating, heat treatment, and thermal processing equipment. The alloy's balanced composition provides optimal performance in both oxidizing and reducing atmospheres while offering superior resistance to carburization and nitridation, establishing it as a premier material for high-temperature furnace components and heat processing equipment. --- #### **1. Chemical Composition (Weight %)** The typical chemical composition of Alloy 330 per UNS N08330 is as follows: | Element | Content (%) | Element | Content (%) | |---------|-------------|---------|-------------| | **Nickel (Ni)** | 34.0 - 37.0 | **Chromium (Cr)** | 17.0 - 20.0 | | **Iron (Fe)** | Balance | **Silicon (Si)** | 0.75 - 1.50 | | **Manganese (Mn)** | 2.00 max | **Carbon (C)** | 0.08 max | | **Copper (Cu)** | 1.00 max | **Sulfur (S)** | 0.030 max | | **Phosphorus (P)** | 0.030 max | **Other Elements** | 0.50 max | --- #### **2. Physical & Mechanical Properties** **Physical Properties:** | Property | Metric Units | Imperial Units | |----------|-----------------|------| | **Density** | 8.00 g/cm³ | 0.289 lb/in³ | | **Melting Range** | 1370 - 1430 °C | 2500 - 2610 °F | | **Thermal Conductivity** | 12.0 W/m·K | 83.2 Btu·in/hr·ft²·°F | | **Coefficient of Thermal Expansion** | 14.4 μm/m·°C | 8.0 μin/in·°F | | **Specific Heat** | 460 J/kg·K | 0.110 Btu/lb·°F | | **Electrical Resistivity** | 1.00 μΩ·m | 600 Ω·cir mil/ft | | **Modulus of Elasticity** | 200 GPa | 29.0 x 10⁶ psi | **Mechanical Properties (Room Temperature):** | Property | Value | |----------|-----------------| | **Tensile Strength** | 550-620 MPa | 80-90 ksi | | **Yield Strength (0.2% Offset)** | 240-310 MPa | 35-45 ksi | | **Elongation** | 30-45% | | **Hardness (Rockwell B)** | 75-85 HRB | **Elevated Temperature Properties (at 1000°C/1832°F):** | **Tensile Strength** | 85 MPa | 12.3 ksi | | **Creep Rupture Strength (1000h)** | 15 MPa | 2.2 ksi | --- #### **3. Key Characteristics & Product Applications** **Key Characteristics:** - **Excellent High-Temperature Strength**: Maintains mechanical properties up to 1150°C - **Superior Oxidation Resistance**: Outstanding performance in oxidizing atmospheres - **Excellent Carburization Resistance**: Superior resistance to carbon penetration - **Good Thermal Fatigue Resistance**: Withstands repeated thermal cycling - **Outstanding Sulfidation Resistance**: Good performance in sulfur-containing environments - **Excellent Fabricability**: Good weldability and formability characteristics **Product Applications:** Alloy 330 serves critical functions in high-temperature industrial applications: - **Heat Treatment Equipment**: - Radiant tubes and furnace muffles - Heat treatment retorts and baskets - Annealing covers and fixtures - Roller hearth furnace components - **Thermal Processing**: - Ceramic kiln furniture - Glass processing equipment - Sintering trays and boats - Heat exchanger components - **Chemical & Petrochemical**: - Reformer tubes and assemblies - Catalyst support systems - High-temperature reactor internals - Process heating elements - **Power Generation**: - Heat recovery systems - Boiler components - Combustion system parts - Thermal oxidizer components --- #### **4. International Standards & Specifications** Alloy 330 complies with the following international standards: **Primary Specifications:** - **UNS N08330**: Unified Numbering System - **ASTM B536**: Plate, Sheet, and Strip - **ASTM B511**: Rod and Bar - **ASTM B512**: Seamless Pipe and Tube - **ASTM B514**: Welded Tube **International Equivalents:** - **EN**: 1.4886 (X12NiCrSi35-16) - **DIN**: 1.4886 - **JIS**: SUH330 - **ISO**: 4955 (Heat-resistant steel and alloy) --- #### **Summary of Key Advantages** - **Proven High-Temperature Performance**: Reliable operation up to 1150°C - **Superior Environmental Resistance**: Excellent oxidation, carburization, and sulfidation resistance - **Excellent Thermal Stability**: Maintains properties under prolonged high-temperature exposure - **Good Fabricability**: Suitable for welding, forming, and machining operations - **Versatile Applications**: Suitable for various high-temperature industrial processes - **Comprehensive Standardization**: Meets international quality and performance standards **Technical Note**: Alloy 330 develops a protective, adherent chromium oxide scale during high-temperature service that provides excellent oxidation protection. The alloy exhibits good weldability using matching filler metals and conventional welding processes. For optimal high-temperature performance, a solution annealing treatment at 1035-1120°C (1895-2050°F) followed by rapid cooling is recommended. The material demonstrates excellent resistance to thermal shock and cycling due to its balanced thermal expansion characteristics. Proper support and mounting are essential in high-temperature applications to accommodate thermal expansion and prevent mechanical stress. Storage in dry, clean conditions is recommended 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 3182 gallon liquid totes Special package is available on request.