Heat Exchangers and Waste Heat Recuperators
After you install a heat exchanger or a waste heat recuperator, the last thing you want to see is the tube bundle out on the floor for maintenance or repair. Specifying HAYNES® high-temperature alloys can keep your unit in service where it belongs! In aluminum melting furnaces, glass furnaces, forging furnaces, chemical process facilities, and many complex process environments, HAYNES® alloys give you the performance edge that means not only less frequent down time, but lower lifecycle costs as well. So whether your application is for a shell-and-tube, radiation, or plate-type heat exchanger, there’s a HAYNES® alloy that will do the job, and keep on doing it long after lesser materials would have your maintenance man busy. Look to 214®, 230®, and 556® alloys for all of your high temperature heat exchanger needs.
| Natural-Gas-Fired Furnace Coupon Exposures | |
| Alloy | Nitrogen Absorption (mils/y) |
| 214® | 3 |
| 230® | 11 |
| 556® | 13 |
| 600 | 20 |
| 800H | 36 |
| 304 | 59 |
Nominal Composition
230®
| Nickel | Balance |
| Iron | 3 max. |
| Cobalt | 5 max. |
| Chromium | 22 |
| Molybdenum | 2 |
| Tungsten | 14 |
| Silicon | 0.4 |
| Manganese | 0.5 |
| Aluminum | 0.3 |
| Carbon | 0.10 |
| Boron | 0.015 |
| Lanthanum | 0.01 |
214®
| Nickel | Balance |
| Iron | 3 |
| Cobalt | 2 max. |
| Chromium | 16 |
| Molybdenum | – |
| Tungsten | – |
| Silicon | 0.2 max. |
| Manganese | 0.5 max. |
| Aluminum | 4.5 |
| Carbon | 0.04 |
| Yitrium | 0.01 |
| Zirconium | 0.1 max. |
556®
| Nickel | 20 |
| Iron | Balance |
| Cobalt | 18 |
| Chromium | 22 |
| Molybdenum | 3 |
| Tungsten | 2.5 |
| Silicon | 0.4 |
| Manganese | 1 |
| Aluminum | 0.2 |
| Carbon | 0.10 |
| Nitrogen | 0.2 |
| Tantalum | 0.6 |
| Lanthanum | 0.02 |
| Zirconium | 0.01 |
Product Description
HAYNES® 230® alloy combines excellent high-temperature strength, outstanding resistance to oxidizing environments up to 2100°F (1150°C) for prolonged exposures, premier resistance to nitriding environments, and excellent long-term thermal stability. It is readily fabricated and formed. Other attractive features include lower thermal expansion characteristics than most high-temperature alloys, and a pronounced resistance to grain coarsening with prolonged exposure to high-temperatures. HAYNES® 556® alloy combines effective resistance to sulfidizing, carburizing and chlorine-bearing environments at high temperatures with good oxidation resistance, fabricability, and excellent high-temperature strength. It has also been found to resist corrosion by molten chloride salts, molten zinc, and other aggressive environments. HAYNES® 214® alloy is the most oxidation-resistant, carburization-resistant, and chlorination-resistant alloy available as a fabricable material. Its effective use temperature limit is in excess of 2200°F (1204°C) for prolonged exposure, and up to 2400°F (1316°C) for shorter exposures.
Typical Tensile Properties
| Test Temperature | 0.2% Yield Strength | Ultimate Tensile Strength | Elongation | |||||||
| °F | °C | ksi | ksi | % | ||||||
| – | – | 230® | 556® | 214® | 230® | 556® | 214® | 230® | 556® | 214® |
| 70 | 21 | 56.9 | 59.5 | 82.0 | 124.9 | 118.1 | 145.0 | 48 | 48 | 37 |
| 1200 | 649 | 39.0 | 32.8 | 85.0 | 97.2 | 85.4 | 120.0 | 55 | 52 | 31 |
| 1400 | 760 | 41.2 | 32.0 | 79.0 | 84.9 | 68.5 | 102.0 | 46 | 49 | 15 |
| 1600 | 871 | 32.4 | 28.6 | 47.0 | 58.3 | 47.6 | 60.0 | 59 | 53 | 15 |
| 1800 | 982 | 17.3 | 15.5 | 8.0 | 32.5 | 28.0 | 15.0 | 71 | 63 | 72 |
| 2000 | 1093 | 8.2 | 8.0 | 3.9 | 17.3 | 14.8 | 8.3 | 50 | 55 | 99 |
| 2100 | 1149 | 5.6 | – | 2.0 | 11.4 | – | 4.5 | 40 | – | 99 |
| 2200 | 1204 | 3.7 | – | 1.4 | 8.0 | – | 4.4 | 31 | – | 99 |