Cold Rolled ASTM DIN JIS Inconel 625 No6625 Nickel Alloy Seamless Steel Pipe
Cold Rolled ASTM DIN JIS Inconel 625 No6625 Nickel Alloy Seamless Steel Pipe
Specifications
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Product Name
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Inconel 625 Nickel Alloy Seamless Steel Pipe |
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Material
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Nickel alloy
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Standard
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ASTM B983
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Grade
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INCONEL 718
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Brade
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PYE
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Size
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O.D 6-219mm; W.T:1-30mm
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Chemical composition
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Ni: 50~55% ; Cr:17~21% ; Fe: balance;Mo:2.8~3.3% ; Nb: 4.75~5.5% ; Co: ≤1.0% ; C≤0.08% ; Mn≤0.35% ; Si≤ 0.35% ; Cu≤0.3% ; Al: 0.2~0.8% ; Ti: 0.65~1.15% ; P≤0.015% ;
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Density
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8.24 g/cm3
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Melting range
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1260~1340℃
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Characteristic as below
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1.workability
2.High tensile strength,endurance strength,creep strength and rupture strength at 700℃. 3.High inoxidability at1000℃. 4.Steady mechanical performance in the low temperature. 5.Good welding performance. |
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Metallurgical structure
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718 alloy is Austenitic structure, precipitation hardening generate "γ" made it excellent mechanical performance. G rain boundary generate "δ" made it the best plasticity in the heat treatment.
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Corrosion resistance
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718 alloy with extremely resistance to stress corrosion cracking and pitting ability in high temperature or low temperature environments, especially the inoxidability in the high temperature.
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Application field
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The elevated temperature strength, excellent corrosion resistance and workability at 700℃ properties made it use in a wide range of high requirement environments.
1.Steam turbine 2.Liquid-fuel rocket 3.Cryogenic engineering 4.Acid environment 5.Nuclear engineering |
Chemical Composition( %)
| Cr | Ni | Mo | Co + Nb | Ta | Al | Ti | C |
|---|---|---|---|---|---|---|---|
| 20.00-30.00 | Remainder | 8.0-10.0 | 1.0 max | 3.15-4.15 | .40 max | .40 max | .10 max |
| Fe | Mn | Si | P | S | |||
|---|---|---|---|---|---|---|---|
| 5.0 max | .50 max | .50 max | .015 max | .015 max |
Fabrication with Inconel 625
Alloy 625 has excellent forming and welding characteristics. It may be forged or hot worked providing temperature is maintained in the range of about 1800-2150° F. 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. This nickel alloy can be welded by both manual and automatic welding methods, including gas tungsten arc, gas metal arc, electron beam and resistance welding. It exhibits good restraint welding characteristics.
ASTM Specifications
| Pipe Smls | Pipe Welded | Tube Smls | Tube Welded | Sheet/Plate | Bar | Forging | Fitting | Wire |
|---|---|---|---|---|---|---|---|---|
| B444 | B705 | B444 | B704 | B443 | B446 | - | - | - |
Mechanical Properties
Representative Tensile Properties, bar, 1800° F anneal
| Temp° F | Tensile (psi) | .2% Yield (psi) | Elongation in 2 “ (%) |
|---|---|---|---|
| 70 | 144,000 | 84,000 | 44 |
| 400 | 134,000 | 66,000 | 45 |
| 600 | 132,000 | 63,000 | 42.5 |
| 800 | 131,500 | 61,000 | 45 |
| 1000 | 130,000 | 60,500 | 48 |
| 1200 | 119,000 | 60,000 | 34 |
| 1400 | 78,000 | 58,500 | 59 |
| 1600 | 40,000 | 39,000 | 11 |
In what applications is Inconel 625 used?
- Aircraft ducting systems
- Aerospace
- Jet engine exhaust systems
- Engine thrust-reverser systems
- Specialized seawater equipment
- Chemical process equipment
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