Alloy C276,Hastelloy C276 Pipe,UNS N10276,E FORU

British Specs:，American Specs:AMS 5750 ASTM B462 ASTM B564 ASTM B574 ASTM B575 ASTM B622 ASTM B626 (Tube *) ASTM B619 ASTM B775，German Specs:WS 2.4819

### **Product Datasheet: Alloy C-276 / Hastelloy C-276 Pipe (UNS N10276)** **Alloy C-276** (commercially known as **Hastelloy C-276**) pipe is a nickel-molybdenum-chromium superalloy manufactured in tubular form for handling highly corrosive media in aggressive industrial environments. This product form offers exceptional resistance to a wide range of corrosive chemicals while maintaining structural integrity under high pressure and temperature conditions, making it ideal for critical piping systems in chemical processing, oil and gas, and pollution control industries. --- #### **1. Chemical Composition** The chemical composition of Hastelloy C-276 pipe is precisely controlled to ensure optimal corrosion resistance: | Element | Content (%) | |:---|:---| | **Nickel (Ni)** | Balance | | **Molybdenum (Mo)** | 15.0 - 17.0 | | **Chromium (Cr)** | 14.5 - 16.5 | | **Iron (Fe)** | 4.0 - 7.0 | | **Tungsten (W)** | 3.0 - 4.5 | | **Cobalt (Co)** | 2.5 max | | **Manganese (Mn)** | 1.0 max | | **Vanadium (V)** | 0.35 max | | **Silicon (Si)** | 0.08 max | | **Carbon (C)** | 0.01 max | | **Phosphorus (P)** | 0.025 max | | **Sulfur (S)** | 0.01 max | *Note: The low carbon content minimizes carbide precipitation during welding, maintaining excellent corrosion resistance in the heat-affected zone, while the combination of molybdenum and chromium provides resistance to both reducing and oxidizing environments.* --- #### **2. Physical Properties** Hastelloy C-276 pipe exhibits consistent physical properties across all sizes: | Property | Value | |:---|:---| | **Density** | 8.89 g/cm³ (0.321 lb/in³) | | **Melting Range** | 1325 - 1370°C (2420 - 2500°F) | | **Coefficient of Thermal Expansion** | 11.2 × 10⁻⁶/°C (20-100°C) | | **Thermal Conductivity** | 10.2 W/m·K (at 100°C) | | **Specific Heat** | 427 J/kg·K (at 100°C) | | **Modulus of Elasticity** | 205 GPa (29.7 × 10⁶ psi) | | **Electrical Resistivity** | 1.30 μΩ·m | | **Magnetic Permeability** | <1.001 (essentially non-magnetic) | --- #### **3. Mechanical Properties** **Standard Mechanical Properties (Annealed Condition):** | Property | Seamless Pipe | Welded Pipe | |:---|:---|:---| | **Tensile Strength** | 790 MPa (115 ksi) min | 760 MPa (110 ksi) min | | **Yield Strength (0.2% Offset)** | 415 MPa (60 ksi) min | 380 MPa (55 ksi) min | | **Elongation** | 55% min | 50% min | | **Hardness** | 90 HRB max | 90 HRB max | **Pressure-Temperature Ratings:** - **Maximum Working Pressure:** Varies with pipe size and schedule - **Temperature Range:** -196°C to 1090°C (-320°F to 2000°F) - **Pressure Derating:** Maintains strength at elevated temperatures --- #### **4. Product Specifications** **Available Forms:** - **Seamless Pipe:** Sizes 1/8" to 24" NPS - **Welded Pipe:** Sizes 1/8" to 48" NPS - **Schedules:** 5S, 10S, 40S, 80S, 160, XXS - **Lengths:** Random (16-24'), Double Random (34-40'), Cut to Length **Standard Specifications:** - **OD Tolerances:** ±1% or ±0.5mm, whichever is greater - **Wall Thickness Tolerances:** ±12.5% for seamless, ±10% for welded - **Straightness:** Maximum 1.5mm per meter - **Surface Finish:** Pickled, polished, or as-drawn --- #### **5. Product Applications** **Chemical Processing Industry:** - **Process Piping:** For corrosive chemical transfer - **Reactor Feed Lines:** Handling aggressive reactants - **Acid Transport Systems:** Sulfuric, hydrochloric, phosphoric acids - **Chlorine Handling Systems:** Wet and dry chlorine service - **Solvent Recovery Lines:** Organic chemical processing **Oil & Gas Industry:** - **Sour Gas Lines:** H₂S and CO₂ containing environments - **Production Flow Lines:** Corrosive crude and gas production - **Refinery Process Lines:** Corrosive hydrocarbon streams - **Subsea Pipelines:** Deepwater production systems - **Well Injection Lines:** Chemical injection systems **Pollution Control:** - **Flue Gas Desulfurization:** Absorber circulation lines - **Scrubber System Piping:** Chemical scrubber applications - **Waste Treatment Lines:** Chemical waste processing - **Stack Liners:** Corrosive gas handling **Pharmaceutical Industry:** - **Process Piping:** For active pharmaceutical ingredients - **Clean Utility Lines:** High-purity chemical transfer - **Reactor Transfer Lines:** Between process vessels - **Waste Collection Systems:** Chemical waste lines --- #### **6. International Standards** **Material & Manufacturing Standards:** - **UNS N10276**: Unified Numbering System designation - **ASTM B619**: Standard for Welded Pipe - **ASTM B622**: Standard for Seamless Pipe and Tube - **ASTM B626**: Standard for Welded Tube - **ASME SB619/SB622**: ASME Boiler and Pressure Vessel Code **Dimensional Standards:** - **ASME B36.10/19**: Welded and Seamless Wrought Steel Pipe - **ISO 1127**: Stainless steel tubes - Dimensions, tolerances - **ANSI B36.19**: Stainless Steel Pipe **Testing & Inspection Standards:** - **ASTM A530**: General Requirements for Specialized Carbon and Alloy Steel Pipe - **ASTM E213**: Ultrasonic Testing of Metal Pipe and Tubing - **ASTM E309**: Eddy Current Examination of Steel Tubular Products - **Hydrostatic Testing**: Per applicable code requirements --- #### **7. Corrosion Resistance** **Excellent Resistance To:** - **Hydrochloric Acid:** All concentrations and temperatures - **Sulfuric Acid:** Wide concentration range up to 70% - **Phosphoric Acid:** All concentrations and temperatures - **Chloride Solutions:** Superior pitting and crevice corrosion resistance - **Wet Chlorine Gas:** Outstanding performance - **Organic Acids:** Formic, acetic, and other organic acids **Corrosion Performance Data:** - **Critical Pitting Temperature:** >85°C - **Critical Crevice Temperature:** >65°C - **Pitting Resistance Equivalent Number (PREN):** ~69 - **General Corrosion Rate:** <0.1 mm/year in most aggressive media --- #### **8. Fabrication & Installation** **Welding Procedures:** - **Recommended Processes:** GTAW (preferred), GMAW - **Filler Metal:** ERNiCrMo-4 - **Preheat:** Not normally required - **Interpass Temperature:** <120°C - **Post-Weld Heat Treatment:** Generally not required **Bending & Forming:** - **Cold Bending:** Minimum bend radius 3 × OD - **Hot Bending:** Recommended for heavy wall pipe - **Bending Methods:** Induction, rotary draw, compression bending **Installation Considerations:** - **Support Spacing:** Standard carbon steel spacing applicable - **Expansion Management:** Proper expansion loop design - **Connection Methods:** Welding, flanging, threading - **Gasket Selection:** Compatible with service conditions --- #### **9. Quality Assurance** **Testing & Certification:** - **Chemical Analysis:** Certified mill test reports - **Mechanical Testing:** Tensile, hardness, flattening tests - **Non-Destructive Examination:** UT, RT, ET, PT as specified - **Hydrostatic Testing:** Standard or to customer requirements - **Dimensional Inspection:** To specified tolerances **Certification Requirements:** - **EN 10204 3.1/3.2**: Material inspection certificates - **NACE Compliance**: For sour service applications - **PED 2014/68/EU**: Pressure Equipment Directive - **Third-Party Inspection**: Available as required --- #### **10. Key Advantages** * **Exceptional Corrosion Resistance:** Outstanding performance in diverse corrosive environments * **High Pressure Capability:** Suitable for high-pressure applications * **Temperature Resistance:** Maintains properties from cryogenic to high temperatures * **Excellent Fabricability:** Good welding and forming characteristics * **Long Service Life:** Reduced maintenance and replacement costs * **Industry Acceptance:** Compliant with major international standards * **Versatile Applications:** Suitable for multiple industrial sectors * **Proven Reliability:** Extensive service history in critical applications Hastelloy C-276 pipe provides a reliable, high-performance solution for the most demanding corrosive service applications, offering exceptional resistance to a wide range of aggressive chemicals while maintaining structural integrity under challenging operating conditions across chemical processing, oil and gas, pollution control, and other demanding industries.

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 2030 gallon liquid totes Special package is available on request.