Alloy 20 / 020，Incoloy 020 Pipe，,E FORU

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

**Product Name:** Alloy 20 / Incoloy® 020 Pipe | UNS N08020 **Material Type:** Nickel-Iron-Chromium Austenitic Stainless Steel Pipe **Standard:** ASTM B464, ASME SB464, ASTM B729, ASTM B775 --- ### **Overview** Alloy 20 Pipe (UNS N08020), commercially known as **Incoloy® 020**, is a nickel-iron-chromium austenitic stainless steel pipe specifically engineered for handling sulfuric acid and other aggressive chemical media. Available in both seamless and welded configurations, this alloy offers exceptional corrosion resistance, making it ideal for chemical processing, pharmaceutical, and industrial applications where conventional stainless steels fail. --- ### **Key Advantages** - **Superior Sulfuric Acid Resistance:** Excellent performance in sulfuric acid service across all concentrations - **Chloride Stress Corrosion Cracking Resistance:** Outperforms 300-series stainless steels - **Excellent General Corrosion Resistance:** Suitable for wide range of corrosive media - **Good Mechanical Properties:** High strength and durability under pressure - **Excellent Fabricability:** Easy to weld, form, and install - **Long Service Life:** Reduced maintenance and replacement costs --- ### **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 - **Specific Heat:** 500 J/kg·K at 100°C #### **Mechanical Properties (Annealed Condition)** | Property | Typical Value | |----------|---------------| | Tensile Strength | 620-690 MPa (90-100 ksi) | | Yield Strength (0.2% Offset) | 300-415 MPa (44-60 ksi) | | Elongation | 30-50% | | Hardness | 150-190 HB | | Minimum Design Stress | 138 MPa (20 ksi) at 100°C | --- ### **Product Specifications** #### **Pipe Specifications** - **Size Range:** 1/8" to 24" NPS (DN6 to DN600) - **Schedule:** 5S, 10S, 40S, 80S, and custom schedules - **Length:** Random 15-20 feet, cut lengths available - **Types:** Seamless and welded (EFW, ERW) - **Ends:** Plain end, beveled end, threaded and coupled #### **Standard Specifications** - **ASTM B464:** Welded Pipe - **ASTM B729:** Seamless and Welded Tube - **ASME SB464:** Welded Pipe for ASME Code Applications - **ASTM B775:** General Requirements for Nickel Alloy Pipe #### **Dimensional Standards** - **ASTM B464/B465:** Welded and Seamless Pipe - **ASME B36.19:** Stainless Steel Pipe - **ANSI/ASME B36.10:** Welded and Seamless Wrought Steel Pipe --- ### **International Standards & Certifications** - **UNS:** N08020 - **ASTM/ASME:** B464/SB464, B729 - **EN:** 10216-5 (Technical Delivery Conditions) - **ISO:** 1127 (Stainless Steel Pipe Dimensions) - **Certifications:** NACE MR0175, PED 2014/68/EU, ISO 15156 --- ### **Applications** #### **Chemical Processing Industry** - Sulfuric acid pickling lines and handling systems - Chemical processing and transfer lines - Acid concentration and evaporation systems - Reactor feed and discharge lines - Process interconnecting piping #### **Pharmaceutical Industry** - Process piping for acid-based reactions - CIP (Clean-in-Place) systems - High-purity chemical transfer lines - Pharmaceutical intermediate processing #### **Food Processing** - Vinegar production and processing lines - Acid food product transfer systems - Pickle processing equipment - Food grade acid handling #### **Industrial Applications** - Pollution control systems - Waste treatment plant piping - Industrial chemical transfer lines - Heat exchanger piping systems --- ### **Fabrication & Installation** #### **Welding Procedures** - **Preferred Methods:** GTAW (TIG), GMAW (MIG) - **Filler Metals:** Alloy 20, ERNiCrFe-11, ENiCrFe-2 - **Shielding Gas:** 100% Argon for GTAW - **Preheat:** Not required - **Post-Weld Heat Treatment:** Generally not necessary #### **Cutting & Forming** - **Plasma Cutting:** Recommended for precise cuts - **Cold Bending:** Minimum bend radius 3x pipe diameter - **Hot Forming:** 1050-1200°C (1920-2190°F) when required #### **Installation** - **Support Spacing:** Standard stainless steel practices - **Expansion Considerations:** Account for thermal expansion - **Gasket Materials:** PTFE, graphite, or alloy 20 spiral wound --- ### **Corrosion Resistance** #### **Chemical Resistance** - **Excellent:** Sulfuric acid (all concentrations to 95°C) - **Good:** Phosphoric acid, nitric acid, organic acids - **Resistant:** Chloride stress corrosion cracking - **Limited:** Hydrochloric acid, hydrofluoric acid #### **Special Features** - Copper content provides exceptional sulfuric acid resistance - Niobium stabilization prevents sensitization during welding - Balanced composition for wide pH range service - Superior to Type 316L and 317L in chloride environments --- ### **Quality Assurance** #### **Testing & Inspection** - Hydrostatic testing per applicable standards - Non-destructive examination (RT, UT, PT) - Dimensional verification - Surface finish inspection - Chemical analysis and mechanical testing #### **Certification** - Mill test certificates to EN 10204 3.1/3.2 - Material test reports with full traceability - NACE MR0175/ISO 15156 compliance certification - PED certification for pressure applications --- ### **Pressure-Temperature Ratings** | Temperature (°C) | Maximum Allowable Stress (MPa) | |------------------|-------------------------------| | -29 to 38 | 138 | | 100 | 138 | | 150 | 128 | | 200 | 119 | | 250 | 111 | --- ### **Conclusion** Alloy 20/Incoloy® 020 Pipe offers an exceptional combination of corrosion resistance, mechanical strength, and fabrication versatility for handling aggressive chemical media. Its superior performance in challenging chemical environments, combined with excellent weldability and formability, makes it the preferred choice for critical piping systems in chemical processing, pharmaceutical, and industrial applications. The availability in both seamless and welded forms provides engineers with flexible solutions for designing durable, reliable piping systems that ensure long-term performance in corrosive 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 applicable codes and standards.*

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 2680 gallon liquid totes Special package is available on request.