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Hastelloy C-4

Hastelloy C-4(UNSNO 6455)
the alloy is an austenitic low-carbon nickel-molybdenum-chromium alloy. Nicrofer 6616hMo main differences from other early developed alloys with similar chemical compositions are low carbon, silicon, iron, and tungsten content. such chemical composition makes it exhibit excellent stability at 650-1040℃ and improves the ability to resist intergranular corrosion. the edge line corrosion sensitivity and weld heat affected zone corrosion can be avoided under appropriate manufacturing conditions. Alloys are used in FGD systems, pickling and acid regeneration plants, acetic acid and agrochemical production, titanium dioxide production (chlorine process), electrolytic electroplating, etc.
Hastelloy C-4 common number corresponding

Category

General name

Number of German marks

Unified Digital Number Number Number

GB of China New brand

 DIN Germany

Ni-Cr-Mo

 Hastelloy C-4(61Ni16Mo16Cr)

2.461

N26455

NS335

W.Nr.2.4610NiMo16Cr16Ti



Hastelloy C-4 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

B 574

N06455

B 574

N06455



Hastelloy C-4 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

8.6

1335

 10.1(100℃)

408

211


1.24


10.9(100℃)



Hastelloy C-4 chemical composition

Licence

Chemical element%

C

Mn

Si

P

S

Mo

Fe

Ni

Cr

Ti

Ksi[Mpa] of minimum tensile strength

Minimum yield strength Ksi[Mpa]

Minimum elongation,% gauge 2 inches

 Hastelloy C-4

Max

0.01

1.00

0.08

0.025

0.01

14.0-17.0

3.0

65

14.0-18.0

0.7

783Mpa

365Mpa

55



Hastelloy C-4 temperature range

General name

Specification No.

Licence

Temperature range

Hastelloy C-4

ASTM B 574

N06455

Applicable temperature -200 to +400°C only use solid-soluble materials



Hastelloy C-4 heat treatment requirements

Materials

Heat treatment

Hastelloy C-4

Melting point :℃1350-1400



Inconel600 corrosion properties

Medium

Oxidative acids such as nitric acid, nitric acid and sulfuric acid, mixed acid, gallic acid and sulfuric acid, etc., can also be resistant to oxidizing salts or medium containing other oxidants such as hypochlorite at higher temperatures than normal temperature, and have good corrosion resistance to various media such as organic acids and acid solutions containing chlorides.

 Good corrosion resistance to seawater, acetic acid, wet chlorine, can also be used in chlorine containing Huawei medium. But the corrosion resistance of Ni-Mo alloy in hydrochloric acid is not as good as that of Ni-Mo alloy

with℃530–1090℃sensitization temperature can withstand long worldly without producing severe intergranular corrosion sensitivity.

The corrosion rate Hastelloy C-4 higher than that of Hastelloy C-276 in highly reductive acids like hydrochloric acid