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 825 seamless tube and nickel 200 seamless tube for reliable performance.
| Technical Specifications | |
| Mo/W Content | Mo 15-17%, W 3-4.5% |
| CPT/CCCT | 110°C/75°C in FeCl₃ |
| Heat Treatment | 1121°C solution annealed |
| Corrosion Rate | <0.1mm/year in 10% HCl |
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.
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
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.
Sulfuric acid concentrators (93-99% at 90°C)
Wet chlorine gas headers
Flue gas desulfurization (FGD) absorber modules
Pharmaceutical HCl synthesis reactors
NACE MR0103 (Method B) • ISO 15156 • ASME SB619
