A nickel, chromium, and molybdenum-based material, that is destined to address welding concerns is Hastelloy C276. This is mainly because one can perform the welding process very easily, and they can be easily formed. High ductility is also shown. Other than this, because it has higher contents of chromium, nickel, and molybdenum, they offer superior corrosion resistance.
1. Hastelloy C276 hardness
C276 Hastelloy is a type of metal that is known for being very hard. This hardness makes it very useful in situations where strength and durability are important.
| Type |
Rockwell hardness |
Brinell hardness |
Hardness Rockwell c (HRBW) |
| Alloy C276 Sheet |
90RB |
230HB |
88 |
| Hastello C276 Plate |
87RB |
230HB |
88 |
2. Hastelloy C276 density
Hastelloy is a type of metal known for its strength and resistance to corrosion. When it’s at room temperature (72°F), its density is a certain value. Hastelloy can withstand very high temperatures before melting—specifically between 2415 to 2500°F.
| Property |
Temperature in °F |
Units |
Units in metric |
| C276 Hastello Density |
72 |
RT |
0.321 lb/in3 |
RT |
8.89 g/cm3 |
3. Hastelloy C276 allowable stress
Hastelloy has a density that’s specific to its material composition. At a standard temperature of 72°F, Hastelloy maintains its density characteristics. Its melting point ranges between 2415 to 2500°F, which is the temperature where it turns from a solid to a liquid.
| Non-exceeded temperatures (°F) |
Max permissible stress
(in psi, excluding boiling) |
Including boiling |
| 1300 |
3500 |
1600 |
| 1200 |
6000 |
3500 |
| 1100 |
13000 |
6000 |
| 1000 |
17000 |
6600 |
| 900 |
18000 |
6800 |
| 800 |
18000 |
7000 |
| 700 |
19000 |
7200 |
| 600 |
20000 |
7500 |
| 500 |
20000 |
7700 |
| 400 |
21000 |
8000 |
| 300 |
23000 |
8600 |
| 200 |
24000 |
9300 |
| 100 |
25000 |
10000 |
4. Alloy C276 weldability
Nickel alloy C276 is renowned for its exceptional weldability, primarily due to the presence of two critical elements, Mo (Molybdenum) and W (Tungsten), in its chemical composition. This makes it highly suitable for a variety of welding methods, both conventional and modern, such as PLASMA, GTAW (Gas Tungsten Arc Welding), GMAW (Gas Metal Arc Welding), and SMAW (Shielded Metal Arc Welding).
One of the key advantages of welding Nickel alloy C276 is that it does not necessitate post-weld heat treatment beforehand. However, it is crucial to remove any heat tint after welding to ensure the surface remains free from the need for pickling.
When it comes to selecting the appropriate welding technique, the GTAW pulse technique is often recommended, especially when welding with filler metal or without filler metal. The choice of filler metal is critical when filler metals are used. Filler metals with higher Mo content are typically preferred, such as ERNiCrMo-10 and ERNiCrMo-4. These choices are favored because the higher Mo content helps maintain optimal corrosion resistance, particularly in scenarios where exposure to seawater is a concern.
In essence, the ability to weld Nickel alloy C276 with various methods, coupled with the strategic choice of filler metals like ERNiCrMo-10 and ERNiCrMo-4, underscores its versatility and reliability in applications where corrosion resistance and durability are paramount considerations.
5. Machining Hastelloy C276
Another advantage of Hastelloy C276 is that it can be machined well, especially when it is in the annealed condition.
When machining Hastelloy C276, it’s important to use low cutting speeds because the material tends to harden during machining. Additionally, the cutting tool must engage properly with all parts of the material.
To achieve good machining results, it’s crucial to use adequate depths of cut when drilling Hastelloy C276. This helps avoid contact with any work-hardened areas that were formed earlier.
6. Resistance to oxidation and non-oxidizing acids
Inconel C276 not only stays strong against general corrosion but also stands up to oxidation and various types of acids, whether they’re oxidizing or not. This makes it highly advantageous for a wide range of applications where these properties are crucial.
| Condition type |
Description |
| Alloy C276 for seawater |
When dealing with marine applications or piping systems, they require a material that can withstand extreme pressure conditions and resist oxidation and aqueous corrosions. |
| Nickel alloy C276 compatibility with sulfuric acid |
Excellent resistance to acids which are non-oxidizing such as sulphuric acids |
| Hastelloy C276 chloride resistance |
It is also a good resistant to chloride gas, solutions of chlorine dioxides and even hypochlorite |
| Alloy C276 galvanic corrosion |
Since it has excellent properties inherited to provide resistance to both oxidizing and reducing environments, it is demanded by many industrial standards |
| Inconel C276 in caustic service |
Pure caustic conditions, where this grade is demanded most favourable to deliver non-degraded performance |
| Hastelloy C276 cryogenic |
Because of high contents of nickel, chromium and molybdenum it is suitable for cryogenic applications. Hence, it is widely suggested for industrial standards to use it |
| C276 resistance to hydrochloric acid |
When exposed to room temperatures or up to 120°F, it shows excellent resistance at this temperature to hydrochloric acids. |
7. Hastelloy C276 stress corrosion cracking
Hastelloy C276 provides excellent resistance to corrosion and stress corrosion cracking due to its high nickel, chromium, and molybdenum content. The addition of tungsten further enhances its ability to meet diverse industrial standards, making it a reliable choice across various applications.
8. Alloy C276 material heat treatment
To enhance the properties of C276 Hastelloy, it should be solution heat-treated at 2050°F and then rapidly quenched. Before final installation or fabrication, any hot-formed parts must also undergo this solution heat treatment.
9. Nickel alloy C276 thermal conductivity
Hastelloy C276 offers several advantages as a material choice. Its superior resistance to corrosion, even in harsh environments with high temperatures and corrosive chemicals, makes it highly durable and reliable. This makes it suitable for a wide range of applications where performance under extreme conditions is crucial.
| Units (in W/m-k) |
Temperature (in °F) |
| 28.1 |
2000 |
| 26.7 |
1800 |
| 24.9 |
1600 |
| 22.9 |
1400 |
| 20.9 |
1200 |
| 19 |
1000 |
| 16.9 |
800 |
| 15 |
600 |
| 13 |
400 |
| 11.1 |
200 |
| 10.2 |
100 |
| 9.4 |
0 |
| 8.6 |
-100 |
| 7.2 |
-270 |
Other useful & technical data about Alloy C276 material
Hastelloy C276 minimum temperature limits/low-temperature limits
The best temperatures for shaping alloy C276 through hot forming range from 870 to 1230 degrees Celsius. These temperatures are ideal for making the material easier to shape and mold according to desired specifications.
Hastelloy C276 maximum temperature
C276 Inconel is a type of alloy that can handle very high temperatures, up to around 1900°F. Even at such high temperatures, it performs really well in tough environments where there are strong oxidizers like nitric acids, especially when they’re hot and concentrated.
In simpler terms, C276 Inconel is great for use in extremely hot conditions and harsh chemicals like strong nitric acid. It holds up well and keeps working effectively even under these challenging circumstances.
Hastelloy C276 modulus of elasticity
This chart shows how much C276 Hastelloy can stretch or bend under different conditions. It helps customers understand its flexibility and strength.
| Type |
Heat treating condition |
Testing temperature (°F) |
Elasticity modulus (psi) |
| Plates |
2050°F, with rapid quenching |
1000 |
25.5 |
| 800 |
26.4 |
| 600 |
27.3 |
| 400 |
28.3 |
| Room temperature |
29.8 |
Hastelloy C276 chemical composition
C276 material has strong and reliable properties even at high temperatures. It performs well under heat, making it a great choice for demanding conditions where strength and stability are crucial.
| Components |
Component percentage |
| Mo (Molybdenum) |
15-17 |
| Ni (Nickel) |
57 |
| Cr (Chromium) |
14.5-16.5 |
| W (Tungsten) |
3-4.50 |
| Fe (Iron) |
4-7 |
| V (Vanadium) |
0.35 |
| Mn (Manganese) |
1 |
| P (Phosphorous) |
0.025 |
| S (Sulphur) |
0.010 |
| Si (Silicon) |
0.080 |
| C (Carbon) |
0.010 |
| Co (Cobalt) |
2.50 |
Hastelloy C276 mechanical properties
C276 material has strong and reliable performance even at high temperatures, making it ideal for demanding mechanical applications. Its robust properties ensure stability and strength under challenging conditions.
| Mechanical properties |
Units (in MPa) |
| Tensile strength: at 1000°F, with 4.8-25.4 thickness. |
601.2 |
| Hardness |
87 |
| Yield strength: offset of 0.2% and 2.40mm thickness at 427°C, thickness of 0.0945 at 801°F |
204.8 |
| Break elongation: at 1.6-4.7mm thickness and for 50.8mm at 204°C, and for thickness range 0.0630-0.185 in 399°F |
56% |
| Melting point |
2415-2500°F |
| Modulus of elasticity |
205 GPa |
Hastelloy C276 alternative material
C276 material offers strong and reliable performance at high temperatures, making it ideal for demanding mechanical applications. Its properties remain stable even under extreme heat, ensuring durability and effectiveness in challenging environments.
Applications of Hastelloy C276
C276 Hastelloy is widely used because it can withstand high temperatures, making it ideal for:
Uses and Applications
- Oil and gas industries
- Chemical processing equipment
- Power generation
Is Hastelloy C276 nace compliant
C276 Inconel alloy is great for places where things like oil and gas are because it’s really good at not getting messed up by stuff that can make metals fall apart. It’s especially tough against stress and cracking from corrosion. This alloy is officially approved for oil and gas use according to the rules in NACE MR0175.
