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Model No: Haynes 625
Haynes 625
Haynes 625 alloy (UNS N06625) is a nickel- chromium-molybdenum alloy with excellent strength from room temperature up to about 1500°F (816°C). At higher temperatures
Delivery :
FOB
minimum order :
100 kilograms
Supply Ability :
5000Tonkilograms / Month
Stock Time :
7-10Day
Country of Origin :
CHINA
Quantity :
Haynes 625 Principal Features
Excellent Strength Up To 1500°F (816°C), Good Oxidation Resistance, and Good Resistance to Aqueous Corrosion
Haynes 625 alloy (UNS N06625) is a nickel- chromium-molybdenum alloy with excellent strength from room temperature up to about 1500°F (816°C). At higher temperatures, its strength is generally lower than that of other solid-solution strengthened alloys. Alloy 625 has good oxidation resistance at temperatures up to 1800°F (982°C) and provides good resistance to aqueous corrosion, but generally not as effectively as modern HASTELLOY corrosion- resistant alloys.
Haynes 625 Applications
Haynes 625 alloy is widely used in a variety of high- temperature aerospace, chemical process industry, and power industry applications. It provides excellent service in short- term applications at temperatures up to approximately 1500°F (814°C); however, for long-term elevated temperature service, use of alloy 625 is best restricted to a maximum of 1100°F (593°C). Long-term thermal exposure of alloy 625 above 1100°F (593°C) will result in significant embrittlement. For service at these temperatures, more modern materials, such as Haynes 230 alloy, are recommended.
As a low-temperature corrosion-resistant material, alloy 625 has been widely used in chemical process industry, sea water, and power plant scrubber applications. However, in most current requirements it has largely been superseded by more capable Hastelloy alloys, such as Hastelloy C-22 and G-30 alloys.
Haynes 625 Chemical Composition
| Element | Content (%) |
| Nickel, Ni | 62 |
| Chromium, Cr | 21 |
| Molybdenum, Mo | 9 |
| Iron, Fe | ≤ 5 |
| Tantalum, Ta | 3.7 |
| Niobium, Nb | 3.7 |
| Cobalt, Co | ≤ 1 |
| Manganese, Mn | ≤ 0.50 |
| Silicon, Si | ≤ 0.50 |
| Titanium, Ti | ≤ 0.40 |
| Aluminum, Al | ≤ 0.40 |
| Carbon, C | ≤ 0.10 |
Haynes 625 Physical Properties
| Properties | Metric | Imperial |
| Density | 8.44 g/cm3 | 0.305 lb/in3 |
| Melting point | 1290 - 1350°C | 2350 - 2460°F |
Haynes 625 Mechanical Properties
| Properties | Metric | Imperial |
| Tensile strength | 915 MPa | 133000 psi |
| Yield strength | 425 MPa | 61600 psi |
| Elastic modulus | 208 GPa | 30200 ksi |
| Elongation at break | 46% | 46% |
Haynes 625 Thermal Properties
| Properties | Metric | Imperial |
| Thermal expansion co-efficient (@25-200°C/77-392°F) | 12.8 µm/m°C | 7.11 µin/in°F |
| Thermal conductivity | 9.80 W/mK | 68 BTU in/hr.ft².°F |
Haynes 625 Other Designations
Equivalent materials to HAYNES 625 are tabulated below:
| AMS 5599 | AMS 5837 | AMS 5879 | ASTM B443 | ASTM B444 |
| AMS 5581 | AMS 5666 | ASTM B366 | ASTM B446 | ASTM B704 |
| ASTM B705 | DIN 2.4856 | GE B50TF133 | MIL E-21562 (RN625) |
Haynes 625 Easily Fabricated
Haynes 625 alloy has excellent forming and welding characteristics. It may be forged or otherwise hot-worked providing temperature is maintained in the range of about 1800 to 2150°F (982 to 1177°C). Ideally, to control grain size, finish hot working operations should be performed at the lower end of the temperature range. Because of its good ductility, alloy 625 is also readily formed by cold working. However, the alloy does work-harden rapidly so intermediate annealing treatments may be needed for complex component forming operations.
In order to restore the best balance of properties, all hot- or cold-worked parts should be annealed and rapidly cooled.
The alloy can be welded by both manual and automatic welding methods, including gas tungsten arc (GTAW), gas metal arc (GMAW), electron beam, and resistance welding. It exhibits good restraint welding characteristics.
Haynes 625 Heat Treatment
Unless otherwise specified, wrought Haynes 625 alloy is normally supplied in the mill-annealed condition. The alloy is usually mill-annealed at 1925°F plus or minus 25°F (1052°C plus or minus 14°C) for a time commensurate with section thickness and rapidly cooled or water-quenched for optimum properties. Depending on customer requirements, alloy 625 may also be supplied solution heat-treated at temperatures at or above 2000°F (1093°C), or mill annealed at temperatures below 1925°F (1052°C). Lower temperature mill annealing treatments may result in some precipitation of second phases in alloy 625 which can affect the alloy’s properties.
Lork Group is an supplier of industrial metals to the global aerospace, oil and gas, power generation, petrochemical, bio-medical, pharmaceutical, and other high tech manufacturing industries. Products of premium metal products including Inconel alloys,Incoloy alloys,Monel alloys,Haynes alloys,Hastelloy alloy,stainless steelandother superalloy. We certify to most ASME, ASTM, AMS, and military specifications as well as most international standards certification.
