Alloy 20 / 020，Incoloy 020 Bar(Round bar, Flat bar)，,E FORU

British Specs:，American Specs:，German Specs: WS 2.4660

**Product Name:** Alloy 20 / Incoloy® 020 Bar (Round Bar & Flat Bar) | UNS N08020 **Material Type:** Nickel-Iron-Chromium Austenitic Stainless Steel Bar **Standard:** ASTM B473, ASME SB473, ASTM A479, ASTM A484 --- ### **Overview** Alloy 20 Bar (UNS N08020), commercially known as **Incoloy® 020**, is a nickel-iron-chromium austenitic stainless steel available in both round bar and flat bar forms. This alloy is specifically engineered for superior performance in sulfuric acid environments and other aggressive chemical media. The bar products offer exceptional corrosion resistance combined with excellent mechanical properties and fabrication characteristics, making them ideal for manufacturing critical components across various industries. --- ### **Key Advantages** - **Exceptional Sulfuric Acid Resistance:** Optimized performance in sulfuric acid service across all concentrations - **Superior Chloride Resistance:** Excellent resistance to stress corrosion cracking - **Enhanced Mechanical Properties:** Optimal strength-to-toughness ratio - **Excellent Fabricability:** Good machinability and weldability characteristics - **Stabilized Chemistry:** Niobium addition prevents sensitization during welding - **Versatile Product Forms:** Available in round bar and flat bar configurations --- ### **Chemical Composition (Typical Weight %)** | Element | Content (%) | Element | Content (%) | |---------|-------------|---------|-------------| | Nickel (Ni) | 32.0-38.0 | Chromium (Cr) | 19.0-21.0 | | Iron (Fe) | Balance | Molybdenum (Mo) | 2.0-3.0 | | Copper (Cu) | 3.0-4.0 | Manganese (Mn) | ≤2.0 | | Silicon (Si) | ≤1.0 | Carbon (C) | ≤0.07 | | Niobium (Nb) | 8×C-1.0 | Phosphorus (P) | ≤0.045 | | Sulfur (S) | ≤0.035 | | | --- ### **Physical & Mechanical Properties** #### **Physical Properties** - **Density:** 8.08 g/cm³ (0.292 lb/in³) - **Melting Range:** 1440-1500°C (2620-2730°F) - **Thermal Expansion Coefficient:** 15.9 × 10⁻⁶/°C (20-100°C) - **Modulus of Elasticity:** 186 GPa (27 × 10⁶ psi) - **Thermal Conductivity:** 12.9 W/m·K at 100°C - **Electrical Resistivity:** 0.90 μΩ·m at 20°C #### **Mechanical Properties (Annealed Condition)** | Property | Round Bar | Flat Bar | |----------|-----------|----------| | Tensile Strength | 620-690 MPa | 600-670 MPa | | Yield Strength (0.2% Offset) | 300-415 MPa | 290-400 MPa | | Elongation | 30-50% | 35-55% | | Hardness | 150-190 HB | 140-180 HB | | Reduction of Area | 50-70% | 55-75% | --- ### **Product Specifications** #### **Round Bar Specifications** - **Diameter Range:** 1/8" to 24" (3mm to 600mm) - **Length:** Standard 10-20 feet, custom lengths available - **Tolerances:** Per ASTM A484 requirements - **Surface Finish:** Hot finished, cold finished, centerless ground, polished - **Condition:** Solution annealed and pickled #### **Flat Bar Specifications** - **Thickness:** 1/8" to 6" (3mm to 150mm) - **Width:** 1/2" to 12" (12mm to 300mm) - **Length:** Standard 10-20 feet, cut to size available - **Edge Conditions:** Square edges, rounded corners available - **Surface:** Hot rolled, annealed, and descaled --- ### **International Standards & Certifications** - **UNS:** N08020 - **ASTM:** B473, A479, A484 - **ASME:** SB473, SA479 - **EN:** 10088-3 (Material No. 2.4660) - **Certifications:** NACE MR0175/ISO 15156, PED 2014/68/EU --- ### **Applications** #### **Chemical Processing Industry** - Pump shafts and impellers - Valve stems and components - Mixer shafts and agitators - Fasteners and stud bolts - Reactor internals and accessories - Heat exchanger parts #### **Pharmaceutical Industry** - Process equipment components - Tank fittings and accessories - Material handling parts - Sanitary processing components #### **Food Processing Equipment** - Acid food processing machinery - Vinegar production equipment - Pickle processing components - Food acid handling systems #### **Industrial Applications** - Structural supports in corrosive environments - Machine components for chemical service - Bearing surfaces - Specialized fasteners --- ### **Fabrication Characteristics** #### **Machining** - **Machinability Rating:** 40-50% of B1112 steel - **Cutting Speed:** 40-60 SFPM for turning operations - **Tool Geometry:** Positive rake angles recommended - **Coolant:** Essential for optimal tool life and surface finish #### **Welding** - **Recommended Processes:** GTAW, GMAW, SMAW - **Filler Metals:** Alloy 20, ENiCrFe-2, ENiCrFe-3 - **Preheat:** Not required - **Post-Weld Heat Treatment:** Generally not necessary #### **Forming & Bending** - **Cold Forming:** Excellent capabilities - **Bend Radius:** 2-3 times thickness for flat bar - **Hot Working:** 1050-1200°C (1920-2190°F) - **Springback Considerations:** Account for material elasticity --- ### **Corrosion Resistance** #### **Chemical Resistance Profile** - **Excellent Resistance:** Sulfuric acid (all concentrations to 95°C) - **Good Resistance:** Phosphoric acid, nitric acid, organic acids - **Chloride Resistance:** Superior to 300-series stainless steels - **Limitations:** Not recommended for hydrochloric acid service #### **Special Features** - Copper content enhances sulfuric acid resistance - Niobium stabilization prevents intergranular corrosion - Balanced composition for wide pH range coverage - Excellent resistance to stress corrosion cracking --- ### **Quality Assurance** #### **Testing & Certification** - Chemical analysis certification - Mechanical property testing - Corrosion testing per ASTM A262, Practice E - Non-destructive testing available - Full material traceability #### **Quality Standards** - Mill test certificates to EN 10204 3.1/3.2 - Ultrasonic testing per ASTM A388 - Dimensional verification per applicable standards - Surface quality inspection --- ### **Packaging & Handling** - Individual protection for finished surfaces - Moisture-resistant wrapping - Proper identification and tagging - Special packaging for polished surfaces - Secure bundling for flat bars --- ### **Conclusion** Alloy 20/Incoloy® 020 Bar in both round and flat forms provides an outstanding combination of corrosion resistance, mechanical properties, and fabrication versatility. Its superior performance in sulfuric acid and other aggressive chemical environments makes it the material of choice for critical components across chemical processing, pharmaceutical, and food industries. The availability in both round and flat bar configurations offers designers and manufacturers flexibility in creating durable, corrosion-resistant equipment that ensures long-term reliability in demanding service conditions. --- *Incoloy® is a registered trademark of Special Metals Corporation. All technical data are typical values and should be verified for specific applications. Consult manufacturer's specifications for project-specific requirements and performance data.*

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 2679 gallon liquid totes Special package is available on request.