ASTM B444 UNS N06625(INCONEL 625/DIN 2.4856) NICKEL ALLOY STEEL U-BEND TUBE
ASTM B444 UNS N06625(INCONEL 625/DIN 2.4856) NICKEL ALLOY STEEL U-BEND TUBE
Inconel 625 is a nonmagnetic, corrosion and oxidation resistant, nickel-base alloy. It has high strength and toughness in the temperature range cryogenic to 2000°F (1093°C) which is derived largely from the solid solution effects of the refractory metals, columbium and molybdenum, in a nickel-chromium matrix. Alloy 625 has excellent fatigue strength and stress - corrosion cracking resistance to chloride ions.
Typical applications for Alloy 625 have included heat shields, furnace hardware, gas turbine engine ducting, combustion liners, spray bars, chemical plant hardware and special seawater applications.Available forms are seamless pipe, welded pipe, seamless tube, welded tube, bar, wire, sheet, plate, forgings, pipe fittings and flanges like inconel 625 plates, inconel 625 pipe, inconel 625 reducer, inconel 625 round bar, inconel 625 fittings, inconel 625 elbow, inconel 625 sheet, inconel 625 tube etc.
Chemical Analysis of ALLOY 625 (UNS N06625)
Specifications
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Incoloy Compositions (Percentages)
Alloy Name | Balance | Chro | Alu | Tita | Carbon | Yttrium Oxide | Copper | Man | Cobalt | Nickel | Phos | Silicon | Sulphur | Moly | Nb |
020 | Fe (~40%) | 20 | N/P | N/P | <0.07 | N/P | 3.5 | <2.0 | N/P | 35 | <0.045 | <1.0 | <0.035 | 2.5 | About 1 |
DS | Fe (~40%) | 18 | N/P | 0.2 | 0.1 | Nil | 0.5 | 0.8-1.5 | 18 (Co+ | 18 (Co+ | N/P | 2.3 | 0.03 |
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MA956 | Fe (~75%) | 20 | 4.75 | 0.4 | <0.1 | 0.5 | <0.15 | <0.3 | <0.3 | <0.5 | <0.02 | N/P | N/P |
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Inconel Is A Family Of Austenitic Nickel-Chromium-Based Superalloys.
Inconel Composition
Inconel | Element (% By Mass) | ||||||||||||||
Ni | Cr | Fe | Mo | Nb | Co | Mn | Cu | Al | Ti | Si | C | S | P | B | |
600 | 72.0 | 14.0–17.0 | 6.0–10.0 |
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| 1.0 | 0.5 |
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| 0.5 | 0.15 | 0.015 |
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617 | 44.2–56.0 | 20.0–24.0 | 3.0 | 8.0–10.0 |
| 10.0–15.0 | 0.5 | 0.5 | 0.8–1.5 | 0.6 | 0.5 | 0.15 | 0.015 | 0.015 | 0.006 |
625 | 58.0 | 20.0–23.0 | 5.0 | 8.0–10.0 | 3.15–4.15 | 1.0 | 0.5 |
| 0.4 | 0.4 | 0.5 | 0.1 | 0.015 | 0.015 |
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690 | 59.5 | 30 | 9.2 |
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| 0.35 | 0.01 | 0.02 |
| 0.35 | 0.019 | 0.003 |
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718 | 50.0–55.0 | 17.0–21.0 | Balance | 2.8–3.3 | 4.75–5.5 | 1.0 | 0.35 | 0.2–0.8 | 0.65–1.15 | 0.3 | 0.35 | 0.08 | 0.015 | 0.015 | 0.006 |
X-750 | 70.0 | 14.0–17.0 | 5.0–9.0 |
| 0.7–1.2 | 1.0 | 1.0 | 0.5 | 0.4–1.0 | 2.25–2.75 | 0.5 | 0.08 | 0.01 |
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Inconel DIN NR. 2.4856 Pipe Chemical Composition
Grade | C | Mn | Si | Fe | S | Cr2 | Al-Ti | Ni | |
625 | min. | – | – | – | – | – | 20.0 | – | 58.0 |
max. | 0.10 | 0.50 | 0.50 | 5.0 | 0.015 | 23.0 | 0.40 | – | |
Inconel 625 Mechanical Properties
Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
Rockwell B (HR B) max | Brinell (HB) max | ||||
625 | Psi – 1,35,000 , MPa -930 | Psi – 75,000 , MPa – 517 | 42.5 | – | – |
Equivalent Grades for Alloy 625 UNS N06625 Pipe
Grade | UNS No | Old British | Euronorm | GOST | Japanese JIS | ||
BS | En | No | AFNOR | ||||
Inconel 625 | N06625 | NA 21 | NiCr22Mo9Nb | 2.4856 | NC22DNB4M | ХН75МБТЮ | NCF 625 |
Inconel 625 Alloy is frequently used for:
- Heat shields
- Tubing
- Combustion and chimney liners
- Valves
- Piping
- Distillation columns
- Bubble caps
- Reaction vessels
- Heat exchangers
- Furnace hardware
- Gas turbine engine duct work
- Equipment used to produce acid
- Sour gas production tubes
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