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Hastelloy C-276

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

Cast castings

Forgings (similar deformed alloys)

Bar

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

New brand

Old brand

Hastelloy C-276

NS3304

NS334

UNS N10276

W.Nr.2.4819(NiMo16Cr15W)

NC17D




Hastelloy C-276 physical properties:

 Density

 Melting point

 Thermal conductivity

 Specific heat capacity

 Elastic modulus

 Shear modulus

 resistivity

Poisson's ratio

 Line expansion coefficient

g/cm3

λ/(W/m•℃)

J/kg•℃

GPa

GPa

μΩ•m

a/10-6℃-1

8.9

1325

10.2(100℃)

407

208

79

1.25


11.7(20~100℃)



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

 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.

 Good corrosion resistance in cases of oxidation, reduction and halogen ions

Hastelloy C-4 of hydrofluoric acid has lower corrosion rate than Hastelloy C-276.