Alloy C276,Hastelloy C276 Bar(Round bar, Flat bar),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 Bar (Round Bar & Flat Bar) UNS N10276** **Alloy C-276** (commercially known as **Hastelloy C-276**) bar products are nickel-molybdenum-chromium superalloys supplied in both round and flat bar forms, offering exceptional corrosion resistance across a wide range of severe environments. These product forms are specifically engineered for manufacturing components that require outstanding performance in aggressive chemical media, high-temperature applications, and corrosive processing conditions across various industries. --- #### **1. Chemical Composition** The chemical composition of Hastelloy C-276 bars 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 carefully balanced composition provides exceptional resistance to both oxidizing and reducing media, while the low carbon content minimizes carbide precipitation during welding operations.* --- #### **2. Physical Properties** Hastelloy C-276 bars exhibit consistent physical properties: | 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 per ASTM B574):** | Property | Round Bar | Flat Bar | |:---|:---|:---| | **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 | | **Reduction of Area** | 65% min | - | | **Hardness** | 90 HRB max | 90 HRB max | **Elevated Temperature Properties:** - **Maximum Service Temperature:** 1090°C (2000°F) - **Creep Strength:** Excellent up to 870°C (1600°F) - **Stress Rupture Strength:** 170 MPa at 650°C (1200°F) --- #### **4. Product Specifications** **Round Bar:** - **Diameter Range:** 3mm to 500mm (0.125" to 20") - **Length:** Standard 3-6 meters, custom lengths up to 12 meters - **Surface Condition:** Hot finished, cold drawn, turned, ground, polished - **Tolerances:** ±0.1mm to ±1.0mm depending on diameter **Flat Bar:** - **Thickness:** 5mm to 150mm (0.187" to 6") - **Width:** 20mm to 300mm (0.75" to 12") - **Length:** Standard 3-6 meters, custom lengths available - **Edge Condition:** As-rolled, machined, or precision ground --- #### **5. Product Applications** **Round Bar Applications:** - **Pump Shafts:** For corrosive fluid handling systems - **Valve Stems:** In severe service chemical applications - **Fasteners:** High-strength corrosion-resistant bolts and studs - **Mixer Components:** Agitator shafts for chemical reactors - **Instrumentation:** Sensor housings and probe components **Flat Bar Applications:** - **Structural Components:** For corrosive environment structures - **Support Brackets:** In chemical processing equipment - **Wear Strips:** For abrasive and corrosive applications - **Machined Parts:** Base material for custom components - **Heat Exchanger Components:** Support bars and grids **Chemical Processing:** - **Reactor Internals:** Support grids and mixing elements - **Heat Exchanger Parts:** Tube sheets and support structures - **Pump Components:** Casings, impellers, and wear parts - **Valve Bodies:** Gate, globe, and check valve components **Oil & Gas Industry:** - **Wellhead Components:** Valve parts and trim components - **Downhole Tools:** Mandrels and connector elements - **Subsea Equipment:** Structural and pressure-containing parts - **Refinery Components:** Reactor internals and support systems **Pollution Control:** - **FGD Systems:** Absorber tower internals and supports - **Scrubber Components:** Support structures and brackets - **Waste Treatment:** Mixer components and support elements --- #### **6. International Standards** **Material Standards:** - **UNS N10276**: Unified Numbering System designation - **ASTM B574**: Standard for Low-Carbon Nickel-Molybdenum-Chromium Alloy Bar - **ASME SB574**: ASME Boiler and Pressure Vessel Code - **DIN 2.4819**: German Industrial Standard - **EN 10095**: NiMo16Cr15W (European Standard) **Industry Specifications:** - **NACE MR0175/ISO 15156**: Suitable for sour service applications - **API 6ACRA**: Corrosion-resistant alloy applications - **PED 2014/68/EU**: Pressure Equipment Directive compliant - **ASTM A484**: General Requirements for Stainless Steel Bars **Quality Standards:** - **ASTM E8**: Standard Test Methods for Tension Testing - **ASTM E10**: Standard Test Method for Brinell Hardness - **ASTM E112**: Standard Test Methods for Determining Average Grain Size --- #### **7. Corrosion Resistance** **Excellent Performance In:** - **Hydrochloric Acid:** All concentrations and temperatures - **Sulfuric Acid:** Wide range of concentrations - **Phosphoric Acid:** Excellent resistance across concentrations - **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 Characteristics** **Machining:** - **Machinability Rating:** 40-50% (compared to 1212 steel) - **Tool Materials:** Carbide tools recommended - **Cutting Parameters:** Moderate speeds with positive rake angles - **Coolant Requirements:** Essential for optimum results **Welding:** - **Recommended Processes:** GTAW, GMAW - **Filler Metal:** ERNiCrMo-4 - **Preheat:** Generally not required - **Post-Weld Heat Treatment:** Usually not necessary **Forming:** - **Cold Working:** Good formability in annealed condition - **Hot Working:** Temperature range 1175-1250°C - **Annealing:** 1150°C minimum with rapid cooling --- #### **9. Heat Treatment** **Solution Annealing:** - **Temperature Range:** 1120-1175°C (2050-2150°F) - **Cooling Method:** Rapid water quench or fast air cool - **Purpose:** To dissolve precipitated phases and restore corrosion resistance **Important Notes:** - Stress relieving not recommended - Aging treatment not applicable - Rapid cooling essential after annealing --- #### **10. Quality Assurance** **Testing & Certification:** - **Chemical Analysis:** Certified mill test reports - **Mechanical Testing:** Tensile, hardness tests - **Non-Destructive Testing:** UT, MT, PT as required - **Dimensional Inspection:** To specified tolerances - **Corrosion Testing:** Per customer requirements **Certification:** - **EN 10204 3.1/3.2**: Material inspection certificates - **NACE Compliance**: For sour service applications - **Third-Party Inspection**: Available as required --- #### **11. Key Advantages** * **Exceptional Corrosion Resistance:** Outstanding performance in diverse corrosive environments * **Versatile Product Forms:** Available in round and flat bar configurations * **Excellent Fabricability:** Good machining and welding characteristics * **High Temperature Capability:** Maintains properties at elevated temperatures * **Proven Reliability:** Extensive service history in critical applications * **Industry Compliance:** Meets major international standards * **Non-Magnetic Properties:** Suitable for sensitive applications * **Technical Support:** Comprehensive application engineering support Hastelloy C-276 round and flat bars provide engineers and manufacturers with reliable, high-performance material solutions for critical components operating in the most demanding corrosive environments, particularly in chemical processing, oil and gas, pollution control, and power generation industries where both corrosion resistance and mechanical integrity are essential requirements.

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 2029 gallon liquid totes Special package is available on request.