Hastelloy C-276 of nickel-chromium-molybdenum alloys containing tungsten
the alloy has excellent corrosion resistance to most corrosion media in oxidation and reduction states. Excellent point corrosion resistance, crevice corrosion and stress corrosion cracking performance. alloys are suitable for various chemical process industries containing oxidizing and reducing media. The high content of molybdenum and chromium enables the alloy to resist the erosion of chloride ions, and the tungsten element further improves its corrosion resistance. Hastelloy C-276 is one of the few materials that can resist the corrosion of moisture-wet chlorine gas, hypochlorite and chlorine dioxide solution. The alloy has significant corrosion resistance to high concentration of chlorinated salt solution (such as ferric chloride and copper chloride).
Hastelloy C-276 common number corresponding
|
Category |
General name |
Number of German marks |
Unified Digital Number Number Number |
|
Ni-Cr-Mo |
Hastelloy C-276 54Ni16Mo15Cr |
2.4686 |
Hastelloy C-276 corresponding casting forgings and bar grades
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Cast castings |
Forgings (similar deformed alloys) |
Bar |
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Specification No. |
Licence |
Specification No. |
Licence |
Specification No. |
Licence |
|
ASTM A 494 |
CW-2M |
ASTM B 462ASTM B 564 |
N10276 |
B 574 |
N10276 |
Hastelloy C-276 other brands corresponding
|
Name |
GB of China |
ASTM of the United States |
DIN Germany |
British BS |
AFNOR France |
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New brand |
Old brand |
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Hastelloy C-276 |
NS3304 |
NS334 |
UNS N10276 |
W.Nr.2.4819(NiMo16Cr15W) |
NC17D |
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Hastelloy C-276 physical properties |
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Density |
Melting point |
Thermal conductivity |
Specific heat capacity |
Elastic modulus |
Shear modulus |
resistivity |
Poisson's ratio |
Line expansion coefficient |
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|
g/cm3 |
℃ |
λ/(W/m•℃) |
J/kg•℃ |
GPa |
GPa |
μΩ•m |
a/10-6℃-1 |
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|
8.9 |
1325 |
10.2(100℃) |
407 |
208 |
79 |
1.25 |
11.7(20~100℃) |
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|
1370 |
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Hastelloy C-276 chemical composition
|
Licence |
UNS No. |
Chemical element% |
C |
Mn |
Si |
P |
S |
Mo |
Fe |
Ni |
Cr |
Ksi[Mpa] of minimum tensile strength |
Minimum yield strength Ksi[Mpa] |
Minimum elongation,% gauge 2 inches [50 mm] |
|
CW2M |
N26455 |
Max |
0.02 |
1.00 |
0.80 |
0.03 |
0.03 |
15.0-17.5 |
2.0 |
Balance |
15.0-17.5 |
72[495] |
40[275] |
20 |
Hastelloy C-276 temperature range
|
General name |
Specification No. |
Licence |
Temperature range |
|
Hastelloy C-276 |
ASTM B 564 |
N10276 |
Suitable temperature ≤675℃, flange end valve ≤538℃ only use solid solution material |
Hastelloy C-276 heat treatment requirements
|
Licence |
Heat treatment requirements |
|
CW-2M |
Heat up to more than 1175℃, keep enough time to heat the casting to this temperature, then quench it in water or otherwise quench it. |
Hastelloy C-276 corrosion properties
|
Medium |
|
Corrosion of oxidizing acids such as nitric acid, nitric acid and sulfuric acid, mixed acid, gallic acid and sulfuric acid, as well as corrosion of oxidizing salts or media containing other oxidants such as hypochlorite at higher temperatures than normal temperature |
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Good corrosion resistance to seawater, acetic acid, wet chlorine, can also be used in chlorine or chlorinated media. but the corrosion resistance of nickel molybdenum alloy in hydrochloric acid is not as good as that of nickel molybdenum alloy. |
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Good corrosion resistance in cases of oxidation, reduction and halogen ions |
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Hastelloy C-4 of hydrofluoric acid has lower corrosion rate than Hastelloy C-276. |