A specification called ASTM B444 is made specifically for Inconel alloys, and it specifically includes Inconel 625. Because of their exceptional qualities, most Inconel alloys, including ASTM b444 Inconel 625 Tube, are referred to as high performing alloys and tend to be corrosion resistant. Nickel, chromium, molybdenum, and columbium are all elements found in Inconel 625 ASTM B444 Seamless Pipe and Tube's alloy.
According to the specified requirements, the materials are divided into two grades, grade 1 and grade 2, based on how they are furnished. This means that the grade 1 seamless nickel pipe required by ASTM B444 must be delivered in an annealed state. On the other hand, the material is categorised as ASTM b444 Grade 2 Nickel Alloy Seamless Tube if the method of supplying is solution annealing. These pipes and tubes are tested and chemically evaluated, just like many other ASTM requirements. All Ni Alloy SB 444 Tubes must pass testing to ensure that their characteristics meet or comply with a predetermined set of characteristics at room temperature.
For astm b444-16 tubing at room temperature, the qualities that are often evaluated for include elongation as well as tensile and yield strength. The specification also calls for a hydrostatic test, an acceptable fibre stress test, and a certain nondestructive electric test to be performed on each ASTM B444 UNS N06625 Seamless Pipe.
| Standard | ASTM, ASME, JIS, AISI, AMS, EN, SAE, DIN, NF, TOCT, DS, DTD, GB |
|---|---|
| Size | 4 to 219mm W. T.: 0.5 to 20mm |
| Swg & Bwg | 10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg. |
| Schedule | SCH5, SCH10, SCH10S, SCH20, SCH30, SCH40, SCH40S, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Length | Single Random, Double Random, Standard & Cut length Pipe |
| Finish | Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF, NO.1, NO.4, 2B, BA, HL, 8K, Mirror finish, etc |
| Form | Round, Square, Hollow, Rectangular, Hydraulic, Coiled, Straight Pipes, “U” Shape, Pan Cake Coils etc. |
| Type | Seamless / ERW/ EFW / Welded / Fabricated / CDW / DOM / CEW |
| End | Plain End, Beveled End, Treaded Pipe, Screwed ends |
| Products | Country |
|---|---|
| ASTM B444 UNS NO6625 GRADE 1, AMS 5581 | United Arab Emirates (UAE), South Korea |
| Schedule 5 alloy 625 seamless pipe | Philippines, Canada, Romania |
| 1" Sch. 80S Seamless ASTM B444 UNS N06625 Grade 2 | Taiwan, Philippines, Los Alamos -Mexico, Russia |
| 26.7mm x 5.56mm Sch 160 UNS N06625 | Singapore, South Africa, Bahrain |
| 25NB Alloy 625 pipe SCH.40 | France, Qatar, Europe, Thailand |
| SCH 80 GRADE 1 UNS N06625 hydrostatic pipe | Indonesia, Philippines, Dammam -KSA, Belgium |
| Elements | Composition Limits, % |
|---|---|
| Inconel 625 | |
| Nickel | 58.0 min |
| Chromium |
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| Columbium + Titanium |
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| Carbon | 0.10 max |
| Manganese | 0.50 max |
| Silicon | 0.50 max |
| Phosphorous | 0.015 max |
| Sulfur | 0.015 max |
| Cobalt (if determined) | 1.0 max |
| Iron | 5.0 max |
| Aluminum | 0.40 max |
| Titanium | 0.40 max |
| Condition | Tensile Strength min, ksi (MPa) | Yield Strength (0.2 % offset), min, ksi (MPa) | Elongation in 2 inches or 50.8mm (or 4D)), min % |
|---|---|---|---|
Inconel 625 :
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| Specified Outside Diameter, inches (mm) | Permissible Variation | |||||
|---|---|---|---|---|---|---|
| Outside Diameter inches (mm) | Inside Diameter | Wall Thickness | ||||
| + | - | + | - | + | - | |
| Under 3/32 (2.4) | 0.002(0.05) | 0 | 0 | 0.002(0.05) | 10 | 10 |
| 3/32 (2.4) to 3/16 (4.8), excl | 0.003(0.08) | 0 | 0 | 0.003(0.08) | 10 | 10 |
| 3/16 (4.8) to 1/2 (12.7), excl | 0.004(0.10) | 0 | 0 | 0.004(0.10) | 10 | 10 |
| 1/2 (12.7) to 1 1/4(31.8), incl | 0.005(0.13) | 0 | 0 | 0.005(0.13) | 10 | 10 |
| Length , ft (m) | Tube Size , inches (mm) | PermissibleVariation, inches (mm) | |
|---|---|---|---|
| Over | Under | ||
| Under 1 (0.30) | up to 1.250(31.8), incl | 1/32 (0.8) | 0 (0) |
| 1 (0.30) to 4 (1.22), incl | up to 1.250(31.8), incl | 1/16 (1.6) | 0 (0) |
| Over 4 (1.22) to 10 (3.0), incl | up to 1.250(31.8), incl | 3/32 (2.4) | 0 (0) |
| Over 10 (3.0) | up to 1.250(31.8), incl | 3/16 (4.8) | 0 (0) |
