C276

Alloy C276 is the alloy for outstanding performance in a range of aggressive environments. It is resistant to strong oxidizing chlorides, reducing acids, hot seawater and brine solutions. Alloy C276 is one of the few materials resistant to wet chlorine gas, hypochlorite and chlorine dioxide. Alloy C276 has excellent resistance to chloride pitting, crevice corrosion and stress corrosion cracking. Alloy C276 is oxidation resistant to 1800°F in open air. However, Alloy C276 is generally not recommended for elevated temperature service. The high molybdenum content renders Alloy C276 susceptible to catastrophic oxidation in stagnant conditions, such as under solid deposits.

Chemistry

 NiCrMoMnSiCSPCuVWFe
MIN -- 14.5 15.0 -- -- -- -- -- -- -- 3.0 4.0
MAX balance 16.5 17.0 1.0 0.08 0.01 0.01 0.25 2.0 0.35 4.5 7.0

Specifications

ASME SB 574
ASME SB 575
ASME SB 619ASME SB 619 Class I or II
ASME SB 622
ASTM B 574
ASTM B 575ASTM B 619
ASTM B 619 Class I or IIIASTM B 622NACE MR0175
UNS N10276

Inventory

C276 Pipe, C276 Plate, C276 Sheet, C276 Weld Wire

Common Trade Names

Nickel Alloy C276, Hastelloy C276, Inconel C276

Features

  • Excellent resistance to localized corrosion and to both oxidizing and reducing environments
  • Resists wet chloride gas, hypochlorite and chlorine dioxide
  • Resists chloride stress corrosion cracking even in boiling magnesium chloride
  • Can be used as-welded for most chemical process environments

Applications

  • Stack liners
  • Ducts
  • Dampers
  • Scrubbers
  • Heat exchangers
  • Reaction vessels
  • Evaporators

Physical Properties

Density: 0.321 lb/inch3
Melting Point: 2415-2500°F
Electrical Resistivity: 782 Ohm - circ mil/ft

Temperature, °F -270 -100 0 100 200 400 600 800 1000
Coefficient* of Thermal Expansion, in/in°F x 10-6 -- -- -- -- 6.2 6.7 7.1 7.3 7.4
Thermal Conductivity
Btu • ft/ft2 • hr • °F
4.2 5.0 5.4 5.9 6.4 7.5 8.7 9.8 11.0
Modulus of Elasticity, Dynamic psi x 106 -- -- -- 29.8 -- 28.3 27.3 26.4 25.5

* 70°F to indicated temperature.

Mechanical Properties

Average Tensile Data, Sheet and Plate

Temperature, °F 70 400 600 800 1000
Ultimate Tensile Strength, ksi 114 100 97 94 88
0.2% Yield Strength, ksi 52 40 35 32 33
Elongation, % 60 58 65 64 60
Impact Strength * Min average / min single, ft-lbs 87-90 -- -- -- --