Hastelloy C276 | Acid Processing Specialist
Seamless nickel alloy tube with 16% Mo and 4% W excels in harsh reducing/oxidizing acids. Max service temperature: 1090°C. Critical in flue gas desulfurization (FGD) systems with 0.003mm/year corrosion rate. Discover our alloy 400 seamless tube, alloy 800 seamless tube, alloy 825 seamless tube and nickel 200 seamless tube for reliable performance.
Nickel Alloy Seamless Tube Specification
Features of Nickel Alloy Seamless Tube
Hastelloy Alloy C276 Tubing
Acid-Resistant Chemistry:
UNS N10276 contains 15-17% molybdenum and 4-7% tungsten, creating a PREN >80. Carbon is restricted to <0.01% to minimize carbide precipitation. Iron content <7% eliminates iron oxide inclusion.
Corrosion Data:
HCl Resistance: <0.1 mm/year @50°C/20% concentration
SCC Threshold: >205 MPa in boiling 45% MgCl₂
Pitting Temperature: 110°C in 6% FeCl₃
Intergranular Attack: Passes ASTM G28 Method A
Controlled Fabrication:
Hot extrusion at 1260°C with 8:1 reduction ratio. Solution annealed at 1121°C ±15°C. Mandatory ASTM G150 CPT testing. PMI verification of Ni/Mo/W ratios by OES.
Chemical Processing Service:
Sulfuric acid concentrators (93-99% at 90°C)
Wet chlorine gas headers
Flue gas desulfurization (FGD) absorber modules
Pharmaceutical HCl synthesis reactors
Quality Assurance:
NACE MR0103 (Method B) • ISO 15156 • ASME SB619
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