Alloy 600 (UNS: N06600)
| Bellows Materials | Alloy 600 |
| Trade Name | Inconel 600 |
| Description | A nickel-chromium alloy designed for use from cryogenic to very high temperatures in the range of 2000 °F (1093 °C). |
| Application Notes | Inconel 625 has tremendous resistance to a wide range of unusually severe corrosive environments including high-temperature effects such as oxidation and carburization. Its outstanding strength and toughness in temperature ranges from cryogenic temperatures to high temperature up to 2000° F (1093° C) are derived primarily from the solid solution effects of the refractory metals Columbium and molybdenum in a nickel-chromium matrix. Nickel chromium alloy 625 has excellent resistance to pitting and crevice corrosion, high corrosion-fatigue strength, high tensile strength as well as resistance to stress corrosion cracking to chloride ions — making it an excellent choice for sea-water applications. Inconel is used in aerospace applications as well as marine applications. |
| Industry Uses / Products | Furnace components, chemical processing, food processing nuclear engineering, flexible metal hose tubing, bellows manufacturing |
| UNS | N06600 |
| Specifications | ASTM B168, ASME SB-168, AMS 5540 |
Material Properties
| Density, ρ, lbs/in^3 | 0.304 |
| Yield Strength, Sy, Psi | 35,000 |
| Tensile Strength, Su, Psi | 80,000 |
| Elongation % | 30 |
| Youngs Modulus, E psi | 30000000 |
| Coeff. Thermal Expansion, in/in/˚F | 0.0000092 |
Post Weld Heat Treatement (PWHT)
| Hardening | Cannot be hardened by heat treating |
Chemical Compostion, %
| Iron, Fe | 6.00 – 10.00 |
| Nickel, Ni | 72.0 min. |
| Chromium, Cr | 14.0 – 17.0 |
Alloy 625 (UNS: N06625)
| Bellows Materials | Alloy 625 |
| Trade Name | Inconel 625 |
| Description | A non-magnetic, corrosion and oxidation resistant, nickel-chromium alloy. The high strength of Inconel 625 is the result of the stiffening combination of molybdenum and niobium on the nickel chromium base of the alloy. |
| Application Notes | Inconel 625 has tremendous resistance to a wide range of unusually severe corrosive environments including high-temperature effects such as oxidation and carburization. Its outstanding strength and toughness in temperature ranges from cryogenic temperatures to high temperature up to 2000° F (1093° C) are derived primarily from the solid solution effects of the refractory metals Columbium and molybdenum in a nickel-chromium matrix. Nickel chromium alloy 625 has excellent resistance to pitting and crevice corrosion, high corrosion-fatigue strength, high tensile strength as well as resistance to stress corrosion cracking to chloride ions — making it an excellent choice for sea-water applications. Inconel is used in aerospace applications as well as marine applications. |
| Industry Uses / Products | Flexible metal hose, Tubing bellows Heat exchangers, Seals, Bellows, Marine Components |
| UNS | N06625 |
| Specifications | ASTM B443 Gr 2, ASME SB-443, AMS 5599 |
Material Properties
| Density, ρ, lbs/in^3 | 0.305 |
| Youngs Modulus, E psi | 28000000 |
| Coeff. Thermal Expansion, in/in/˚F | 0.0000069 |
Alloy 625 LCF (UNS: N06626)
| Bellows Materials | Alloy 625 LCF |
| Trade Name | Inconel 625 LCF |
| Description | A fatigue-resistant, bellows-quality version of INCONEL alloy 625. Process designed and controlled to provide a sheet product with optimum resistance to low-cycle and thermal fatigue at up to 1200°F (650°C). |
| Application Notes | The alloy offers a high level of performance in aircraft exhaust and automotive flexible coupling bellows, expansion joints in process or transport piping, and other applications involving resistance to low-cycle or thermal fatigue. |
| UNS | N06626 |
Material Properties
| Density, ρ, lbs/in^3 | 0.305 |
| Poisson’s Ratio, ν | 0.31 |
| Youngs Modulus, E psi | 28000000 |
| Coeff. Thermal Expansion, in/in/˚F | 0.0000092 |
Alloy 718 (UNS: N07718)
| Bellows Materials | Alloy 718 |
| Trade Name | Inconel 718 |
| Description | A high strength nickel base superalloy used for cryogenic temperatures up to long term service at 1200°F. |
| Application Notes | The alloy is readily fabricated and may be welded in either the annealed or precipitation (age) hardened condition. Anneal 1700 -1850°F, air cool or faster. Age 1325°F 8 hours, furnace cool to hold at 1150°F, for a total aging time of 18 hours, air cool. Alloy 718 will show a contraction of 0.0008 inch/inch after precipitation hardening. |
| UNS | N07718 |
| Specifications | ASTM, ASME SB AMS 5596 |
Material Properties
| Density, ρ, lbs/in^3 | 0.297 |
| Poisson’s Ratio, ν | 0.31 |
| Youngs Modulus, E psi | 28000000 |
| Coeff. Thermal Expansion, in/in/˚F | 0.0000076 |