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Inconel 625 is a material with excellent resistance to pitting, crevice and corrosion cracking. Inconel 625 is highly resistant in a wide range of organic and mineral acids. Good high temperature strength.
Characteristics
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 1050C.
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 150C.
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.
Chemistry
Chemical Requirements | |||||||
Ni | Fe | Cr | Si | Mo | Mn | C | |
Max | 5.0 | 23.0 | 0.50 | 10.0 | 0.50 | 0.10 | |
Min | 58.0 | 20.0 | 8.0 | ||||
Tensile Data
| Mechanical Property Requirements | |||||
Ultimate Tensile | Yield Strength (0.2% OS) | Elong. in 2 in. or 50mm or 4D, min., % | R/A | Hardness | |
Cold Worked/Annealed | |||||
Min | 120 KSI | 60 KSi | 30 | ||
Max | |||||
Min | |||||
Max | |||||
Hot Worked/Annealed | |||||
Min | 120 KSi | 60 KSi | 30 | ||
Max | |||||
Min | |||||
Max | |||||
Specifications
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 ASTM B704 AMS 5581 BS3074 GE B50TF133 |
Tube | ASTM B444 ASTM B704 AMS 5581 BS3074 GE B50TF133 |
Fitting | ASTM B366 Din 17754 |
Forging | |
Weld Wire | |
Weld Electrode | |
NA 21 | All forms |
Din | 2.4856 |
Machining
Machinability Ratings
Nickel & cobalt base corrosion, temperature and wear-resistant alloys, such as Inconel 625, are classified as moderate to difficult when machining, however, it should be emphasized that these alloys can be machined using conventional production methods at satisfactory rates. During machining these alloys work 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.
Inconel 625 is a material with excellent resistance to pitting, crevice and corrosion cracking. Inconel 625 is highly resistant in a wide range of organic and mineral acids. Good high temperature strength.
Characteristics
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 1050C.
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 150C.
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.
Chemistry
Chemical Requirements | |||||||
Ni | Fe | Cr | Si | Mo | Mn | C | |
Max | 5.0 | 23.0 | 0.50 | 10.0 | 0.50 | 0.10 | |
Min | 58.0 | 20.0 | 8.0 | ||||
Tensile Data
| Mechanical Property Requirements | |||||
Ultimate Tensile | Yield Strength (0.2% OS) | Elong. in 2 in. or 50mm or 4D, min., % | R/A | Hardness | |
Cold Worked/Annealed | |||||
Min | 120 KSI | 60 KSi | 30 | ||
Max | |||||
Min | |||||
Max | |||||
Hot Worked/Annealed | |||||
Min | 120 KSi | 60 KSi | 30 | ||
Max | |||||
Min | |||||
Max | |||||
Specifications
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 ASTM B704 AMS 5581 BS3074 GE B50TF133 |
Tube | ASTM B444 ASTM B704 AMS 5581 BS3074 GE B50TF133 |
Fitting | ASTM B366 Din 17754 |
Forging | |
Weld Wire | |
Weld Electrode | |
NA 21 | All forms |
Din | 2.4856 |
Machining
Machinability Ratings
Nickel & cobalt base corrosion, temperature and wear-resistant alloys, such as Inconel 625, are classified as moderate to difficult when machining, however, it should be emphasized that these alloys can be machined using conventional production methods at satisfactory rates. During machining these alloys work 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.
