We offer UNS N08825 Nickel Alloy Seamless Pipe and Tube complying with ASTM B423/ASME SB423 specifications, the seamless pipe and tube are manufactured in the form of cold-worked and hot-finished intended for general corrosive service.
ASTM B423 UNS N08825 material is a Nickel-Iron-Chromium-Molybdenum-Copper Alloy grade with high nickel and copper content, ASTM B423 825 Seamless Pipes and Tubes are offered in a wide range of sizes, ASTM B423 UNS N08825 tubes specify outside diameter and nominal or minimum wall, ASTM B423 UNS N08825 pipes specify standard pipe size and schedule.
ASTM B423 UNS N08825 Tube Dimensions
Diameter and Wall Thickness—The permissible variations in the outside diameter and wall thickness shall conform to the permissible variations prescribed in Tables 3, 4, and 5 of Specification B829.
Outside Diameter and Wall Thickness of Seamless Cold-Worked Pipe and Tube
| Nominal Outside Diameter, | Outside Diameter, | Thickness of Specified Minimum Wall, | Thickness of Specified Minimum Wall, | |||
|---|---|---|---|---|---|---|
| in. (mm) | in. (mm) | % | % | |||
| Plus | Minus | Plus | Minus | Plus | Minus | |
| Over 0.400 (10) to 5⁄8 (16), excl | 0.005 (0.13) | 0.005 (0.13) | 15.0 | 15.0 | 30 | 0 |
| 5⁄8 (16) to 11⁄2 (38), incl | 0.0075 (0.19) | 0.0075 (0.19) | 10.0 | 10.0 | 22 | 0 |
| Over 11⁄2 (38) to 3 (76), incl | 0.010 (0.25) | 0.010 (0.25) | 10.0 | 10.0 | 22 | 0 |
| Over 3 (76) to 41⁄2 (114), incl | 0.015 (0.38) | 0.015 (0.38) | 10.0 | 10.0 | 22 | 0 |
| Over 41⁄2 (114) to 6 (152), incl | 0.020 (0.51) | 0.020 (0.51) | 12.5 | 12.5 | 28 | 0 |
| Over 6 (152) to 65⁄8 (168), incl | 0.025 (0.64) | 0.025 (0.64) | 12.5 | 12.5 | 28 | 0 |
| Over 65⁄8 (168) to 85⁄8 (219), incl | 0.031 (0.79) | 0.031 (0.79) | 12.5 | 12.5 | 28 | 0 |
| Over 8.625 (219) to 14 (356), incl | 0.062 (1.57) | 0.031 (0.79) | 15.0 | 12.5 | 30.0 | 0.0 |
| Over 14 (356) to 24 (610), incl | 0.125 (3.18) | 0.031 (0.79) | 15.0 | 12.5 | 30.0 | 0.0 |
Outside Diameter and Wall Thickness of Hot-Finished Tube
| Nominal Outsider Diameter, | Outside Diameter or Inside Diameter, in. | % of Thickness of Specified Nominal Wall | % of Thickness of Specific Minimum Wall | |||
|---|---|---|---|---|---|---|
| in. (mm) | + | − | + | − | + | − |
| 3⁄4 (19) to 11⁄2 (38), incl | 0.015 (0.4) | 0.031 (0.8) | 12.5 | 12.5 | 28.5 | 0 |
| Over 11⁄2 (38.1) to 4 (102), incl | 0.031 (0.8) | 0.031 (0.8) | 12.5 | 12.5 | 28.5 | 0 |
| Over 4 (102) to 91⁄4 (235), incl | 0.062 (1.6) | 0.031 (0.8) | 12.5 | 12.5 | 28.5 | 0 |
Permissible variations for material specified as small-diameter and light-wall tube (converter size) shall conform to the permissible variations prescribed in table below
Permissible Variations for Small-Diameter and Light-Wall Tube (Converter Sizes)
| Outside Diameter, in. (mm) | Outside Diameter, in. (mm) | Outside Diameter, in. (mm) | Inside Diameter, in. (mm) | Inside Diameter, in. (mm) | Wall Thickness, % | Wall Thickness, % |
|---|---|---|---|---|---|---|
| + | − | + | − | + | − | |
| Under 3⁄32 (2.4) | 0.002 (0.05) | 0 | 0 | 0.002 (0.05) | 10 | 10 |
| 3⁄32 to 3⁄16 (2.4 to 4.8), excl | 0.003 (0.08) | 0 | 0 | 0.003 (0.08) | 10 | 10 |
| 3⁄16 to 1⁄2 (4.8 to 12.7), excl | 0.004 (0.10) | 0 | 0 | 0.004 (0.10) | 10 | 10 |
| 1⁄2 to 1 1⁄4 (12.7 to 31.8), incl | 0.005 (0.13) | 0 | 0 | 0.005 (0.13) | 10 | 10 |
ASTM B423 UNS N08825 Chemical Requirements
Material furnished under ASTM B423 shall conform to the applicable requirements specified. Chemical composition limits of the material such as nickel, chromium, iron, manganese, carbon, copper, silicon, sulfur, aluminum titanium, and molybdenum shall conform to the chemical requirements of this specification.
| Element | UNS N08825 | UNS N08221 |
|---|---|---|
| Nickel | 38.0–46.0 | 39.0–46.0 |
| Chromium | 19.5–23.5 | 20.0–22.0 |
| Iron | 22.0 min | 22.0 min |
| Manganese | 1.0 max | 1.0 max |
| Carbon | 0.05 max | 0.025 max |
| Copper | 1.5–3.0 | 1.5–3.0 |
| Silicon | 0.5 max | 0.5 max |
| Sulfur | 0.03 max | 0.03 max |
| Aluminum | 0.2 max | 0.2 max |
| Titanium | 0.6–1.2 | 0.6–1.0 |
| Molybdenum | 2.5–3.5 | 5.0–6.5 |
ASTM B423 UNS N08825 Mechanical Properties
Tensile strength, yield strength and elongation of the material under the specified condition and size shall also conform to the required mechanical properties.
| Alloy | Condition and Size | Tensile Strength, min, ksi (MPa) | Yield Strength 0.2% Offset, min, ksi (MPa) | Elongation in 2 in. or 50 mm (4D), min, % |
|---|---|---|---|---|
| UNS N08825 | hot-finished annealed | 75 (517) | 25 (172) | 30 |
| UNS N08825 | cold-worked annealed | 85 (586) | 35 (241) | 30 |
| UNS N08825 | Hot-forming quality (hot-finished or cold-drawn annealed) | (A) | (A) | (A) |
| UNS N08221 | cold-finished, annealed | 79 (545) | 34 (234) | 30 |
Table 3(A)
| Condition | Tensile Strength, min, ksi (MPa) | Yield Strength 0.2% Offset, min, ksi (MPa) | Elongation in 2 in. or 50 mm (4D), min, % |
|---|---|---|---|
| Annealed (B, C) | 85–115 (586–793) | 35 (241) | 30 |
| Half-hard (D) | 105 (724) min | 75 (517) | 15 |
| Full-hard (E) | 125 (862) min | 100 (689) | 5 |
(B) This condition is sometimes designated as “No. 1 Temper.”
(C) The minimum tensile strength value applies only to tubing in straight lengths.
(D) This condition is sometimes designated as “No. 2 Temper.”
(E) This condition is sometimes designated as “No. 3 Temper.”
Hydrostatic and nondestructive electric tests shall be performed.
Hydrostatic Test—Each pipe or tube with an outside diameter 1⁄8 in. (3 mm) and larger and with wall thickness of 0.015 in. (0.38 mm) and over shall be tested in accordance with Specification B829. The allowable fiber stress, for material in the condition furnished, is as follows:
UNS N08825 hot finished, annealed: 16 600 psi (114 MPa)
UNS N08825 cold-worked, annealed: 21 200 psi (146 MPa)
UNS N08221 cold finished, annealed: 19 700 psi (138 MPa)
Nondestructive Electric Test—Each pipe or tube shall be examined with a nondestructive electric test in accordance with Specification B829.
