C-276 Hastelloy is a nickel base alloy of nickel molybdenum chromium iron tungsten series, which is one of the most corrosion resistant modern metal materials. It is mainly resistant to wet chlorine, various oxidizing chlorides, chloride solutions, sulfuric acid and oxidizing salts, and has good corrosion resistance in low and medium temperature hydrochloric acid. Therefore, in the past 30 years, it has been widely used in harsh corrosive environments, such as chemical industry, petrochemical industry, flue gas desulfurization, pulp and paper making, environmental protection and other industrial fields.
Various corrosion data of Hastelloy C-276 alloy are typical, but they cannot be used as specifications, especially in unknown environments. Materials can only be selected after tests. Hastelloy C-276 alloy does not have enough Cr to resist the corrosion of strong oxidizing environment, such as hot concentrated nitric acid. This alloy is mainly produced for chemical process environment, especially in the presence of mixed acid, such as the discharge pipe of flue gas desulfurization system.
The mechanical properties of Hastelloy are very outstanding. It has the characteristics of high strength and high toughness, so it is difficult to machine. Moreover, its strain hardening tendency is very strong. When the deformation rate reaches 15%, it is about twice that of 18-8 stainless steel. Hastelloy also has a medium temperature sensitization zone, and its sensitization tendency increases with the increase of deformation rate. When the temperature is high, Hastelloy is easy to absorb harmful elements, which makes its mechanical properties and corrosion resistance decline.
Chemical composition
|
Grade
|
C(%)
|
Si(%)
|
Mn(%)
|
P(%)
|
S(%)
|
Cr(%)
|
Ni(%)
|
Mo(%)
|
W(%)
|
V(%)
|
|
C276
|
≤0.08
|
≤2.5
|
≤1.0
|
≤0.04
|
≤0.03
|
15.0-17.0
|
14.5-16.5
|
4.0-7.0
|
3.0-4.5
|
≤0.035
|
Mechanical properties
|
TS
Mpa
|
YS
Mpa
|
EL
(%)
|
Rate of reduction in area
(%)
|
Density
(g/cm3)
|
|
≥640
|
≥270
|
≥45
|
---
|
8.9
|
Specifications
|
Available technical
|
Available thickness
（mm）
|
Available width
（mm）
|
Available finish
|
Available origin
|
|
Cold rolled
|
0.4-3.0
|
Standard:1000 1219 1500
Special :can be ordered
|
2B etc
|
Sweden / Japan / USA etc
|
|
Hot rolled
|
3.0-100
|
Standard:1500 1800 2000
Special :can be ordered
|
No.1 etc
|
Sweden / Japan / USA etc
|
Production Standards
|
Grade
|
GB 15007-2017
|
ASTM
|
DIN
|
JIS
|
KS
|
|
C276
|
00Cr15Ni60Mo16W5Fe5
NS334
|
N10276
(Inconel 276)
|
NiMo16Cr15W
2.4819
|
--
|
--
|
Applications
C276 alloy is suitable for various chemical process industries containing oxidizing and reducing media. The higher content of molybdenum and chromium makes the alloy resistant to chloride ions, and tungsten further improves its corrosion resistance. C276 is one of the only materials that can resist the corrosion of moist chlorine, hypochlorite and chlorine dioxide solution. The alloy has significant corrosion resistance to high concentration chloride solution (such as ferric chloride and copper chloride).
C276 alloy has been widely used in chemical and petrochemical fields, such as elements and catalytic systems contacting chlorinated organics. This material is particularly suitable for use in high-temperature, impurity mixed inorganic and organic acids (such as formic acid and acetic acid) and seawater corrosive environments.
