Alloy 625 - UNS N06625
Alloy 625, UNS N06625, is commonly associated with ASTM B443 - ASTM B444 - ASTM B446 - AMS 5666 - AMS 5599.
Alloy 625 is commonly known as Inconel® 625 and is commercially available in grade 1 though HPA also has some stock in grade 2 and Low Cycle Fatigue (LCF). Alloy 625 is a Nickel-Chrome alloy.
Mechanical properties here.
Chemistry
| C | Cr | Fe | Mo | Mn | Ni | Si | |
|---|---|---|---|---|---|---|---|
| Max | 0.1% | 23% | 5% | 10% | 0.5% | 0.5% | |
| Min | 20% | 8% | 58% |
Typical Inventory
Round Bar, Plate, Tubing, Pipe, Fastener, Forge, Billet
We can cold work high strength into your material to meet your high-performing requirements. We also facilitate size conversions, hot and cold rolling, and heat treating materials, as well as our machining capabilities.
For more information, contact us (or call 1-800-945-8230) and request our GFM Bulletin; you can view our brochure online! There's also more information about our offered services on our production capabilities page.
We have expanded our abilities to work smaller diameter bar down to nominal wire. Also, check out our weld wire to finish the job right!
Product Description
Nickel-chromium-molybdenum alloy 625 is a material with excellent resistance to pitting, crevice and corrosion cracking.
Highly resistant in a wide range of organic and mineral acids.
Good high temperature strength.
General Data
- Excellent mechanical properties at both extremely low and extremely high temperatures.
- Outstanding resistance to pitting, crevice corrosion, and intercrystalline corrosion.
- Almost complete freedom from chloride induced stress corrosion cracking.
- High resistance to oxidation at elevated temperatures up to 1050°C.
- Good resistance to acids, such as nitric, phosphoric, sulfuric, and hydrochloric, as well as to alkalis makes possible the construction of thin structural parts of high heat transfer.
Applications
- Components where exposure to sea water and high mechanical stresses are required.
- Oil and gas production where hydrogen sulfide and elementary sulfur exist at temperature in excess of 150°C.
- Components exposed to flue gas or in flue gas desulfurization plants.
- Flare stacks on offshore oil platforms.
- Hydrocarbon processing from tar-sand and oil-shale recovery projects.
Mechanical Properties
The typical properties listed can usually be provided in rounds, sheet, strip, plate, & custom forgings. We have the equipment to produce small quantities in special sizes to meet our customers’ specific needs.
| Ultimate Tensile (ksi) | Yield Strength (ksi) | Elong. % in 2 in. | Reduction of Area | Hardness (Rockwell C) | |
|---|---|---|---|---|---|
| Min | 120 | 60 | 30 | 40 | 145 |
| Max | 150 | 95 | 60 | 60 | 220 |
Common Specifications
Please, note that the specs listed are for reference and are not comprehensive nor indicative of the actual specifications listed on the Material Test Report (MTR). If you have a special spec requirement, then please reach out to our sales department at 1-800-472-5569.
| Form | Standard |
|---|---|
| Metal Type | UNS N06625 |
| Bar | ASTM B446, AMS 5666, BS3076 |
| Wire | AMS 5837 |
| Sheet | ASTM B443, AMS 5599, BS3072 |
| Plate | ASTM B443, AMS 5599, BS3072 |
| Pipe | ASTM B444, BS3074, GEB50TF133 |
| Tube | ASTM B444, ASTM B704, AMS 5581, BS3074, GEB50TF133 |
| Fitting | ASTM B366, DIN 17754 |
| NA 21 | All forms |
| Din | 2.4856 |
Plasma Arc Cutting
Our alloys can be cut using any conventional plasma arc cutting system. The best arc quality is achieved using a mixture of argon and hydrogen gases. Nitrogen gas can be substituted for hydrogen gases, but the cut quality will deteriorate slightly. Shop air or any oxygen bearing gases should be avoided when plasma cutting these alloys.
Machining
Nickel and cobalt based alloys can be difficult to machinine. However, it should be emphasized that these alloys can be machined using conventional production methods at satisfactory rates. These alloys harden rapidly, generate high heat during cutting, weld to the cutting tool surface and offer high resistance to metal removal because of their high shear strengths. The following are key points which should be considered during machining operations:
- CAPACITY - Machine should be rigid and overpowered as much as possible.
- RIGIDITY - Work piece and tool should be held rigid. Minimize tool overhang.
- TOOL SHARPNESS - Make sure tools are sharp at all times. Change to sharpened tools at regular intervals rather than out of necessity. A 0.015 inch wear land is considered a dull tool.
- TOOLS - Use positive rake angle tools for most machining operations. Negative rake angle tools can be considered for intermittent cuts and heavy stock removal. Carbide-tipped tools are suggested for most applications. High speed tools can be used, with lower production rates, and are often recommended for intermittent cuts.
- POSITIVE CUTS - Use heavy, constant, feeds to maintain positive cutting action. If feed slows and the tool dwells in the cut, work hardening occurs, tool life deteriorates and close tolerances are impossible.
- LUBRICATION - lubricants are desirable. Soluble oils are recommended especially when using carbide tooling.
Data Sheet
Data referring to mechanical properties and chemical analyses are the result of tests performed on specimens obtained from specific locations of the products in accordance with prescribed sampling procedures; any warranty thereof is limited to the values obtained at such locations and by such procedures. There is no warranty with respect to values of the materials at other locations.
References
Ulbrich's information on alloy 625