Description
Hastelloy C276 Pipe Seamless, Welded & ERW
Hastelloy C276 Pipe is a Nickel Chromium Molybdenum wrought alloy that is available in Seamless Pipe, Welded Pipe (ERW Pipe) form. Hastelloy C276 is considered the most versatile corrosion resistant alloy available. C276 alloy is resistant to the formation of grain boundary precipitates in the weld heat-affected zone, thus making it suitable for most chemical process applications in an as welded condition. Hastelloy C276 Seamless Pipes also has excellent resistance to pitting, stress-corrosion cracking and oxidizing atmospheres up to 1900°F. Hastelloy C276 has exceptional resistance to a wide variety of chemical environments.
The combination of the high molybdenum and chromium content, along with the addition of tungsten, make C276 highly resistant to chloride stress corrosion cracking, pitting, crevice corrosion and general corrosion.
Hastelloy C276 can operate in oxidizing atmospheres up to 1900°F (1038°C), however, the alloy lacks sufficient chromium content to operate successfully in the most strongly oxidizing environments like hot, concentrated nitric acid.
The low carbon content of C276 enables the alloy to be utilized in the as-welded condition. It cannot be hardened by heat treatment, but can be hardened by cold working. The alloy has a higher work-hardening rate than the austenitic stainless steels which should be taken into consideration.
UNS N10276 can be easily welded and processed utilizing standard shop fabrication practices for austenitic stainless steels and nickel based alloys.
C276 is also known as Inconel C276 or Hastelloy C276 and is an improved wrought version of alloy C in that it usually doesn’t need to be solution heat-treated after welding and has vastly improved fabricability. This alloy is resistant to the formation of grain boundary precipitates, specifically in the weld-heat affected zone.
Hastelloy C276 Chemical Composition of C276 :
| Elements | Min % | Max % |
| Ni | Bal. | |
| Cr | 14.50 | 16.50 |
| Mn | – | 1.00 |
| Mo | 15.00 | 17.00 |
| C | 0.010 | |
| Si | 0.08 | |
| Fe | 4.00 | 7.00 |
| W | 3.00 | 4.50 |
| Co | – | 2.50 |
| V | – | 0.35 |
| P | – | 0.040 |
| S | – | 0.030 |
Applications of Hastelloy C276 Pipe :
- • Digesters and bleach plants in the paper industry.
- • Components exposed to sour gas.
- • Equipment for flue-gas desulfurisation plants.
- • Evaporators, heat exchangers, filters and mixers used in sulfuric acid environments.
- • Sulfuric acid reactors.
- • Organic chloride process equipment.
- • Equipment for processes utilizing halide or acid catalysts.
Benefits of Hastelloy C276 :
- • It is one of the few alloys resistant to wet chloride gas, hypochlorite and chlorine dioxide solutions.
- • It has exceptional resistance to strong solutions of oxidizing salts, such as ferric and cupric chlorides.
- • It is not prone to grain boundary precipitation in the as welded condition and therefore suitable for many chemical process applications.
Specifications of C276 Grade :
| Form | Standard |
| UNS | UNS N10276 |
| Bar | ASTM B574 Din 17752 |
| Sheet | ASTM B575 Din 17750 |
| Plate | ASTM B575 Din 17750 |
| Fitting | ASTM B366 |
| Forging | ASTM B564 |
| Tube | ASTM B619 ASTM B622 ASTM B626 Din 17751 |
| Pipe | ASTM B619 ASTM B622 ASTM B626 Din 17751 |
| Weld Wire | A5.14 ERNiCrMo-4 |
| Weld Electrode | A5.11 ENiCrMo-4 |
| Din. | 2.4819 All Forms |
- Hastelloy C276
- UNS Number N10276
- W.Nr. 2.4819
- Other common names: Alloy C276, Hastelloy C, Inconel C276
- ASTM B574, B564, B575, B619, B626, B622
- ASME SB574, SB564, SB575, SB619, SB626, SB622