Hastelloy C-276 Sheet
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Hastelloy C-276 (UNS N10276 / W.Nr. 2.4819) is a very commonly used nickel-chromium-molybdenum alloy. Among superalloys, it is known for its high molybdenum content.
Hastelloy C-276 alloy is well suited for gas melting arc (GMA/MIG), gas tungsten arc (GTA/TIG) and shielded metal arc (SMA/Stick) welding processes. Hastelloy C-276 is ideal for marine applications. Its corrosion resistance makes it resistant to various corrosive substances in flowing seawater for a long time. However, Hastelloy C-276 also has good overall performance at high temperatures. It is very suitable for the preparation equipment of various corrosive chemicals or the reactor of various acidic substances.
Hastelloy C-276 Chemical Composition
| % | Ni | Cr | Mo | W | Co | C | Mn | Si | P | S | Fe | V |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | Balance | 14.5 | 15 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 |
| Max | Balance | 16.5 | 17 | 4.5 | 2.5 | 0.01 | 1 | 0.08 | 0.04 | 0.03 | 7 | 0.35 |
Hastelloy C-276 Physical Properties
| Density | Melting range |
|---|---|
| 8.89 g/cm³ | 1325-1370°C |
Hastelloy C-276 Mechanical Properties
| Mechanical & Physical Properties | 21⁰C | 100⁰C | 200⁰C | 300⁰C | 400⁰C |
|---|---|---|---|---|---|
| Ultimate Tensile Strength for sheet ≤ 5 mm thick | 750-1000 | ||||
| Ultimate Tensile Strength for sheet 5 to ≤ 20 mm thick | 700-950 | ||||
| Ultimate Tensile Strength for bar ≤ 90 mm thick | 700-950 | ||||
| 0.2% Yield Strength for sheet ≤ 50 mm thick | 280 | 240 | 220 | 195 | |
| 0.2% Yield Strength for sheet 5 to ≤ 20 mm thick | 255 | 255 | 200 | 170 | |
| 0.2% Yield Strength for bar ≤ 90 mm thick | 255 | 225 | 200 | 170 | |
| Elongation, % for sheet ≤ 5 mm thick | 30 | ||||
| Elongation, % for sheet 5 to ≤ 20 mm thick | 25 | ||||
| Elongation, % for bar ≤ 90 mm thick | 35 | ||||
| Charpy Impact V-notch mean value / J | 96 (56 when welded) | ||||
| Charpy Impact V-notch indicidual value / J | 67 (39 when welded) |
Characteristics of Hastelloy C276
- Excellent corrosion resistance in reducing environments
- Exceptional resistance to strong solutions of oxidizing salts, such as ferric and cupric chlorides
- High nickel and molybdenum contents providing good corrosion resistance in reducing environments
- Low carbon content which minimizes grain-boundary carbide precipitation during welding to maintain resistance to corrosion in heat-affected zones of welded joints
- Resistance to localized corrosion such as pitting and stress-corrosion cracking
- One of few materials to withstand the corrosive effects of wet chlorine gas, hypochlorite and chlorine dioxide
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