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                                • 800-HPALLOY
                                • 1985 E 500 N Windfall, IN 46076
                                  444 Wilson St Tipton, IN 46072
                                  Post Office Box 40 Tipton, IN 46072
                                  tel:8004725569

                                Inconel 625
                                AMS 5599 AMS 5666 ASTM B446 ASTM B443
                                High Temperature (UNS N06625)

                                Request a quote

                                Ni 61.0, Cr 21.5, Mo 9.0, Nb+Ta 3.6

                                High Performance Alloys stocks and produces Inconel 625 in this grade in the following forms: Bar, square bar, wire cuts, sheet, plate, tube, pipe, fastener, disk, machined, forged. Request quote on this grade.

                                 

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                                Overview

                                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. Detailed machining parameters are presented Tables 16 and17. General plasma cutting recommendations are presented in Table 18.

                                 

                                Table 16
                                RECOMMENDED TOOL TYPES AND MACHINING CONDITIONS
                                Operations Carbide Tools
                                Roughing, with severe interruption Turning or Facing C-2 and C-3 grade: Negative rake square insert, 45 degree SCEA1, 1/32 in. nose radius. Tool holder: 5 degree neg. back rake, 5 degree neg. side rake. Speed: 30-50 sfm, 0.004-0.008 in. feed, 0.150 in depth of cut. Dry2, oil3, or water-base coolant4.
                                Normal roughing Turning or Facing C-2 or C-3 grade: Negative rate square insert, 45 degree SCEA, 1/32 in nose radius. Tool holder: 5 degree neg. back rake, 5 degree neg. side rake. Speed: 90 sfm depending on rigidity of set up, 0.010 in. feed, 0.150 in. depth of cut. Dry, oil, or water-base coolant.
                                Finishing Turning or Facing C-2 or C-3 grade: Positive rake square insert, if possible, 45 degree SCEA, 1/32 in. nose radius. Tool holder: 5 degree pos. back rake, 5 degree pos. side rake. Speed: 95-110 sfm, 0.005-0.007 in. feed, 0.040 in. depth of cut. Dry or water-base coolant.
                                Rough Boring C-2 or C-3 grade: If insert type boring bar, use standard positive rake tools with largest possible SCEA and 1/16 in. nose radius. If brazed tool bar, grind 0 degree back rake, 10 degree pos. side rake, 1/32 in. nose radius and largest possible SCEA. Speed: 70 sfm depending on the rigidity of setup, 0.005-0.008 in. feed, 1/8 in. depth of cut. Dry, oil or water-base coolant.
                                Finish Boring C-2 or C-3 grade: Use standard positive rake tools on insert type bars. Grind brazed tools as for finish turning and facing except back rake may be best at 0 degrees. Speed: 95-110 sfm, 0.002-0.004 in feed. Water-base coolant.
                                Notes:
                                1 SCEA - Side cutting edge angle or lead angle of the tool.

                                2 At any point where dry cutting is recommended, an air jet directed on the tool may provide substantial tool life increases. A water-base coolant mist may also be effective.

                                3 Oil coolant should be premium quality, sulfochlorinated oil with extreme pressure additives. A viscosity at 100 degrees F from 50 to 125 SSU.

                                4 Water-base coolant should be premium quality, sulfochlorinated water soluble oil or chemical emulsion with extreme pressure additives. Dilute with water to make 15:1 mix. Water-base coolant may cause chipping and rapid failure of carbide tools in interrupted cuts.

                                 

                                Table 17
                                RECOMMENDED TOOL TYPES AND MACHINING CONDITIONS
                                Operations Carbide Tools
                                Facing Milling Carbide not generally successful, C- grade may work. Use positive axial and radial rake, 45 degree corner angle, 10 degree relief angle. Speed: 50-60 sfm. Feed: 0.005-0.008 in. Oil or waterbase coolants will reduce thermal shock damage of carbide cutter teeth.
                                End Milling Not recommended , but C-2 grades may be successful on good setups. Use positive rake. Speed: 50-60 sfm. Feed: Same as high speed steel. Oil or water-base coolants will reduce thermal shock damage.
                                Drilling C-2 grade not recommended, but tipped drills may be successful on rigid setup if no great depth. The web must thinned to reduce thrust. Use 135 degree included angle on point. Gun drill can be used. Speed: 50 sfm. Oil or water-base coolant. Coolant-feed carbide tipped drills may be economical in some setups.
                                Reaming C-2 or C-3 grade: Tipped reamers recommended, solid carbide reamers require vary good setup. Tool geometry same as high speed steel. Speed: 50 sfm. Feed: Same as high speed steel.
                                Tapping Not recommended, machine threads, or roll-form them.
                                Electrical Discharge Machining The alloys can be easily cut using any conventional electrical discharge machining system (EDM) or wire (EDM).
                                Notes:
                                5 M-40 series High Speed Steels include M-41 , M-42, M-43, M-44, M-45 and M-46 at the time of writing. Others may be added and should be equally suitable.

                                6 Oil coolant should be a premium quality, sulfochlorinated oil with extreme pressure additives. A viscosity at 100 degree F from 50 to 125 SSU.

                                7 Water-base coolant should be premium quality, sulfochlorinated water soluble oil or chemical emulsion with extreme pressure additives. Dilute with water to make 15:1 mix.

                                 

                                Table 18
                                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.

                                 

                                INCONEL® is a registered trademark of the INCO family of companies.



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