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Sourcing high-performance nickel alloys for aggressive chemical environments requires a partner who understands both metallurgy and logistics. Shanghai COCESS Special Alloys Co., Ltd operates as a direct supplier and manufacturer of Hastelloy C276 (UNS N10276 / W.Nr. 2.4819), delivering plates, bars, pipes, and flanges that strictly adhere to ASTM and ASME standards. We serve global clients in chemical processing, oil & gas, and flue gas desulfurization (FGD) sectors, ensuring material traceability and consistent corrosion resistance.
Hastelloy C276 is a nickel-molybdenum-chromium wrought alloy with a tungsten addition, designed to withstand severe corrosion in both oxidizing and reducing states. Its chemical composition is tightly controlled (Ni Bal., Cr 14.5-16.5%, Mo 15.0-17.0%, W 3.0-4.5%, Fe 4.0-7.0%) to achieve a carbon content of ≤0.01%.
This low carbon characteristic prevents carbide precipitation at grain boundaries during welding, which means fabricated structures retain their resistance to intergranular attack without requiring post-weld solution heat treatment. Physically, the alloy maintains a density of 8.89 g/cm³ and offers a tensile strength of approximately 790 MPa with 40% elongation in annealed conditions. It performs reliably in temperatures ranging from cryogenic up to 400°C (750°F), resisting pitting, crevice corrosion, and stress corrosion cracking (SCC) in chloride-rich environments.
We maintain an inventory and production line focused on the four critical product forms required for equipment fabrication and plant maintenance:
Plate & Sheet (ASTM B575 / ASME SB575): Available in thicknesses from 0.5mm to 50mm+. Used for reactor vessels, tower liners, and baffles. We supply both standard mill sizes and cut-to-length pieces to minimize scrap.
Round Bar (ASTM B574 / ASME SB574): Diameters ranging from 6mm to 350mm. These are supplied for machining into valve stems, pump shafts, fasteners, and custom forged components.
Pipe & Tube (ASTM B622 / B619 / B626): Seamless and welded options. Our pipes (typically 1/2" to 6" nominal size for seamless, larger for welded) handle aggressive fluid transfer, including hot sulfuric acid, hydrochloric acid, and wet chlorine gas.
Flanges & Fittings (ASTM B366 / B564): We provide slip-on, weld neck, and blind flanges compliant with ASME B16.5 (Class 150 to 2500) and DIN standards, ensuring compatibility with your existing pipeline specs.
At Shanghai COCESS Special Alloys Co., Ltd, quality assurance follows the raw material through to shipment. Every batch undergoes positive material identification (PMI) and is accompanied by a 3.1 or 3.2 certificate (EN 10204). Our internal protocols verify mechanical properties via tensile testing and confirm corrosion resistance through intergranular corrosion tests (e.g., ASTM G28). This rigorous traceability ensures that the plate, bar, pipe, or flange you receive matches the specified chemistry and mechanical data sheet, reducing risk in your procurement chain.
Procurement managers and engineers select our C276 products for specific high-risk areas:
Chemical Processing: Reactors handling mixed acids (sulfuric/nitric/hydrochloric) and organic chlorides.
Pollution Control: Scrubbers and ducting in FGD systems where flue gases condense into highly acidic liquids.
Oil & Gas: Downhole components and wellhead hardware exposed to sour gas (H2S) and brine.
Pharmaceutical: Equipment requiring high purity and resistance to cleaning agents (CIP/SIP processes).
If your project demands verified Hastelloy C276 plate, bar, pipe, or flange, contact the sales team at Shanghai COCESS Special Alloys Co., Ltd. We provide competitive lead times for both standard stock items and custom-cut requirements. Reach out via sales@cocessalloys.com
