ASTM B564 UNS N10276 / Hastelloy C276 Weld Neck Flange, Raised Face (RF) Class 150/300/600, For Seawater Desalination

Nickel (Ni)

Balance (≥50.99)

Base element, provides fundamental corrosion resistance

Molybdenum (Mo)

15.00 – 17.00

Resists reducing media (hydrochloric acid, sulfuric acid); enhances pitting resistance

Chromium (Cr)

14.50 – 16.50

Forms protective oxide film; resists oxidizing media (nitric acid, wet chlorine)

Iron (Fe)

4.00 – 7.00

Provides strength

Tungsten (W)

3.00 – 4.50

Enhances resistance to localized corrosion (pitting/crevice corrosion)

Cobalt (Co)

≤ 2.50

High-temperature stability

Carbon (C)

≤ 0.010

Ultra-low carbon content prevents carbide precipitation during welding, avoiding intergranular corrosion

Tensile Strength

≥ 690 MPa (100 ksi)

ASTM B462 requires ≥ 690 MPa

Yield Strength (0.2% offset)

≥ 283 MPa (41 ksi)

ASTM B462 requires ≥ 283 MPa

Elongation

≥ 40%

Excellent ductility, easy to form and machine

Density

8.89 g/cm³

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Melting Point

Approx. 1370 °C

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Hardness

≤ 100 HRB / ≤ 217 HB

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