Hastelloy C-2000 (UNS N06200) Coils and Strips: Composition, Properties, Standards and Corrosion-Resistant Applications

<h1>Hastelloy C-2000 (UNS N06200) Coils and Strips: Composition, Properties, Standards and Corrosion-Resistant Applications</h1>

<p><strong>Hastelloy C-2000 (UNS N06200, W.Nr. 2.4675)</strong> is a nickel-chromium-molybdenum alloy engineered to resist an unusually broad range of corrosive media — both oxidizing and reducing. Its high chromium content provides oxidizing-acid resistance while the molybdenum and copper additions handle reducing environments, making it one of the most versatile corrosion alloys available. This article covers its composition, properties, corrosion behaviour, standards and the coil and strip specifications offered for chemical-process and pollution-control equipment.</p>

<h2>What Is Hastelloy C-2000?</h2> <p>Hastelloy C-2000 belongs to the Ni-Cr-Mo family but distinguishes itself through a deliberate balance of chromium (23 %), molybdenum (16 %) and copper (1.6 %). The copper addition is unusual for this family and is responsible for the alloy's superior performance in sulphuric and hydrofluoric acid. C-2000 is a wrought, solid-solution alloy supplied in the fully annealed condition; it is not precipitation-hardened.</p>

<h2>Chemical Composition (wt. %)</h2> <table> <thead><tr><th>Element</th><th>Content (%)</th></tr></thead> <tbody> <tr><td>Nickel (Ni)</td><td>Balance (≈ 59)</td></tr> <tr><td>Chromium (Cr)</td><td>22.0 – 24.0</td></tr> <tr><td>Molybdenum (Mo)</td><td>15.0 – 17.0</td></tr> <tr><td>Copper (Cu)</td><td>1.3 – 1.9</td></tr> <tr><td>Iron (Fe)</td><td>≤ 3.0</td></tr> <tr><td>Cobalt (Co)</td><td>≤ 2.0</td></tr> <tr><td>Carbon (C)</td><td>≤ 0.010</td></tr> <tr><td>Manganese (Mn)</td><td>≤ 0.5</td></tr> <tr><td>Silicon (Si)</td><td>≤ 0.08</td></tr> <tr><td>Aluminium (Al)</td><td>≤ 0.50</td></tr> </tbody> </table>

<h2>Mechanical Properties</h2> <table> <thead><tr><th>Property</th><th>Typical Value</th></tr></thead> <tbody> <tr><td>Tensile strength</td><td>≥ 690 MPa</td></tr> <tr><td>Yield strength (0.2 % offset)</td><td>≥ 310 MPa</td></tr> <tr><td>Elongation</td><td>≥ 45 %</td></tr> <tr><td>Hardness</td><td>≈ 90 HRB</td></tr> <tr><td>Density</td><td>8.50 g/cm³</td></tr> <tr><td>Melting range</td><td>1325 – 1370 °C</td></tr> </tbody> </table>

<h2>Corrosion Resistance</h2> <p>Hastelloy C-2000 is specifically designed for mixed-acid and multi-purpose chemical service. It resists:</p> <ul> <li>Sulphuric acid across a wide concentration and temperature range, including the highly corrosive mid-concentration band</li> <li>Hydrochloric acid in both oxidizing and reducing conditions</li> <li>Hydrofluoric acid and fluoride-containing media</li> <li>Oxidizing salts, chlorides and pitting/crevice environments</li> <li>Seawater and chloride-bearing process streams (excellent pitting and crevice resistance)</li> </ul> <p>The alloy's PRE (Pitting Resistance Equivalent) number is approximately 76, well above Alloy C-276 and C-22, giving it superior resistance to localized attack.</p>

<h2>Standards and Specifications</h2> <table> <thead><tr><th>Form</th><th>Standard</th></tr></thead> <tbody> <tr><td>Plate, sheet and strip</td><td>ASTM B575 / ASME SB575</td></tr> <tr><td>Bar and rod</td><td>ASTM B574 / ASME SB574</td></tr> <tr><td>Seamless pipe and tube</td><td>ASTM B622 / ASME SB622</td></tr> <tr><td>Welded pipe</td><td>ASTM B619 / ASME SB619</td></tr> <tr><td>Filler metal</td><td>ERNiCrMo-17 (AWS A5.14)</td></tr> <tr><td>Designation</td><td>UNS N06200, W.Nr. 2.4675, DIN NiCr23Mo16Cu</td></tr> </tbody> </table>

<h2>Coils and Strips: Available Specifications</h2> <p>Hastelloy C-2000 coil and strip are supplied in the annealed and pickled or bright-annealed condition, with tight thickness tolerance for downstream stamping and forming.</p> <table> <thead><tr><th>Product</th><th>Thickness</th><th>Width</th><th>Coil Weight</th></tr></thead> <tbody> <tr><td>Hot-rolled coil</td><td>3 – 14 mm</td><td>1000 – 2000 mm</td><td>up to 8 t</td></tr> <tr><td>Cold-rolled coil</td><td>0.5 – 3.0 mm</td><td>600 – 1500 mm</td><td>up to 5 t</td></tr> <tr><td>Precision strip</td><td>0.05 – 0.5 mm</td><td>10 – 300 mm</td><td>coil</td></tr> <tr><td>Inner diameter</td><td colspan="3">508 mm or 610 mm</td></tr> <tr><td>Edge</td><td colspan="3">Mill edge or slit edge</td></tr> </tbody> </table>

<h2>Applications</h2> <ul> <li>Chemical-process reactors, columns, heat exchangers and piping</li> <li>Flue-gas desulphurization (FGD) scrubbers and pollution-control systems</li> <li>Sulphuric and hydrofluoric acid production and handling</li> <li>Pharmaceutical and fine-chemical reactors</li> <li>Pickling equipment and metal finishing lines</li> <li>Marine and offshore components exposed to seawater</li> </ul>

<h2>Hastelloy C-2000 vs C-276 vs C-22</h2> <table> <thead><tr><th>Alloy</th><th>Chromium</th><th>Molybdenum</th><th>Best For</th></tr></thead> <tbody> <tr><td>C-2000 (N06200)</td><td>≈ 23 %</td><td>≈ 16 %</td><td>Broadest mixed-acid resistance, HF and H₂SO₄</td></tr> <tr><td>C-276 (N10276)</td><td>≈ 16 %</td><td>≈ 16 %</td><td>Reducing/oxidizing balance, workhorse alloy</td></tr> <tr><td>C-22 (N06022)</td><td>≈ 22 %</td><td>≈ 13 %</td><td>Oxidizing media and chlorides</td></tr> </tbody> </table> <p>Where a single alloy must handle many different process streams, C-2000's balanced chemistry and copper addition usually outperform C-276 and C-22 in sulphuric and hydrofluoric acid.</p>

<h2>Frequently Asked Questions</h2> <p><strong>What is Hastelloy C-2000 used for?</strong><br>Hastelloy C-2000 is used for chemical reactors, heat exchangers, FGD scrubbers and acid-handling equipment where both oxidizing and reducing corrosion occur.</p> <p><strong>Is Hastelloy C-2000 better than C-276?</strong><br>For mixed-acid and sulphuric/hydrofluoric acid service, C-2000 generally performs better due to its higher chromium and copper content. For some purely reducing environments, C-276 can be comparable or more economical.</p> <p><strong>Can Hastelloy C-2000 strip be stamped and formed?</strong><br>Yes. In the annealed condition C-2000 strip has good ductility and can be cold-formed and stamped; work-hardening should be managed with intermediate annealing where deformation is high.</p>

<h2>Ordering Hastelloy C-2000 Coils and Strips</h2> <p>Please specify the standard (e.g. ASTM B575 / ASME SB575), thickness, width, coil weight, edge and surface condition, plus any corrosion-test or third-party inspection requirements. See the full range under <a href="https://www.hangboalloys.com/products/category/hastelloy">Hastelloy products</a> or reach us via the <a href="https://www.hangboalloys.com/contact">contact page</a>.</p>