Difference Between Hastelloy C22 Pipe and C276 Tubes
Hastelloy C22 tubes have a higher chromium content, which enhances their corrosion resistance in oxidizing environments, while C276 alloy tubes have a higher molybdenum content, making them more resistant to reducing environments and pitting corrosion. C22 tubes are generally more suitable for applications with high chloride content and high temperatures, while C276 tubes are preferred for their overall corrosion resistance and ability to withstand high temperatures in harsh conditions.
What is the service temperature limit for Hastelloy C22?
C-22 alloy should not be used above 700°C (1250°F) due to the formation of deleterious phases above this temperature.
What is Hastelloy C22 used for?
C-22 is suitable for highly corrosive media with high chlorides and high temperatures, such as buffer solutions, active pharmaceutical ingredients (APIs), fabric softeners, cleaning products, and fish, soy and chili sauces.
What is the difference between 625 and C276?
Both Inconel 625 and Hastelloy C-276 are nickel-chromium-molybdenum based alloys. They both have excellent corrosion resistance and good strength. Comparing the two alloys, Inconel 625 has a higher chromium content, while Hastelloy C-276 has a higher molybdenum content.
Chemical Composition of Hastelloy C22/C276 Seamless and Welded Pipes / Tubes
| Grade | Ni | C | Mo | Mn | Si | Fe | P | S | Co | Cr | W | V |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hastelloy C22 | Balance | 0.010 max | 12.5-14.5 | 0.50 max | 0.08 max | 2-6 | 0.02 max | 0.02 max | 2.5 max | 20-22.5 | 2.5-3.5 | 0.35 max |
| Hastelloy C276 | Balance | 0.01 max | 15–17 | 1.0 max | 0.08 max | 4–7 | 0.04 max | 0.03 max | 2.5 max | 14.5–16.5 | 3–4.5 | 0.35 max |
Mechanical Properties Of Hastelloy C22/C276 Pipes and Tubes
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
|---|---|---|---|---|---|
| Hastelloy C22 | 8.69 g/cm3 | 1399 °C (2550 °F) | Psi – 1,00,000, MPa – 690 | Psi – 45000, MPa – 310 | 45 % |
| Hastelloy C276 | 8.89 g/cm3 | 1370 °C (2500 °F) | Psi – 1,15,000 , MPa – 790 | Psi – 52,000 , MPa – 355 | 40 % |
Physical Properties of Hastelloy C22 Pipes And Tubes
| Density | 0.314 lb/in3 |
|---|---|
| Specific Gravity | 8.69 lb/in3 |
| Specific Heat (Btu/lb/Deg F - [32-212 Deg F] | 0.1 |
| Melting Point (Deg F) | 2550 |
| Thermal Conductivity | 70 |
| Mean Coeff Thermal Expansion | 6.9 |
| Modulus of Elasticity Tension | 29.9 |
Physical Properties of Hastelloy C276 Pipes And Tubes
| Physical Property | Temp., °F | British Units | Temp., °C | Metric Units |
|---|---|---|---|---|
| Density | 72 | 0.321 lb/in.3 | 22 | 8.89 g/cm.3 |
| Melting Range | 2415-2500 | 1323-1371 | ||
| Electrical Resistivity | 75 | 51 microhm-in. | 24 | 1.30 microhm-m |
| Mean Coefficient of Thermal Expansion |
75-200 | 6.2 microinches/in.-°F | 24-93 | 11.2 x 10-6 m/m•K |
| 75-400 | 6.7 microinches/in.-°F | 24-204 | 12.0 x 10-6 m/m•K | |
| 75-600 | 7.1 microinches/in.-°F | 24-316 | 12.8 x 10-6 m/m•K | |
| 75-800 | 7.3 microinches/in.-°F | 24-427 | 13.2 x 10-6 m/m•K | |
| 75-1000 | 7.4 microinches/in.-°F | 24-538 | 13.4 x 10-6 m/m•K | |
| Thermal Conductivity | -270 | 50 Btu-in./ft.2 hr.-°F | -168 | 7.2 W/m•K |
| -100 | 60 Btu-in./ft.2 hr.-°F | -73 | 8.6 W/m•K | |
| 0 | 65 Btu-in./ft.2 hr.-°F | -18 | 9.4 W/m•K | |
| 100 | 71 Btu-in./ft.2 hr.-°F | 38 | 10.2 W/m•K | |
| 200 | 77 Btu-in./ft.2 hr.-°F | 93 | 11.1 W/m•K | |
| 400 | 90 Btu-in./ft.2 hr.-°F | 204 | 13.0 W/m•K | |
| 600 | 104 Btu-in./ft.2 hr.-°F | 316 | 15.0 W/m•K | |
| 800 | 117 Btu-in./ft.2 hr.-°F | 427 | 16.9 W/m•K | |
| 1000 | 132 Btu-in./ft.2 hr.-°F | 538 | 19.0 W/m•K | |
| Specific Heat (Calculated) |
Room | 0.102 Btu/lb.-°F | Room | 427 J/kg•K |
Gnee Steel is a supplier of Hastelloy C22 Pipe And C276 Tubes, including pipes, tubes, plates, strips, plates, round bars, flat bars, forged billets, hexagons, wire and extruded profiles. We work with steel mills to provide customers with 625 alloy, and its products meet or exceed many leading industry standards, including ASTM, ASME, SAE, AMS, ISO, DIN, EN and BS standards.
Gnee Steel stocks and sells Hastelloy C22 Pipe And C276 Tubes pipes, tubes, plates, strips, plates, round bars, flat bars, forged billets, hexagons, wire and extruded profiles. You are welcome to contact us for a quote at any time at ss@gneesteel.com
