We offer ASTM B163/ASME SB163 UNS N08825 825 nickel alloy seamless tubes for use in the condenser and heat-exchanger service, ASTM B163 UNS N08825 Nickel alloy seamless tubes have excellent corrosion resistance and high temperatures. B163 UNS N08825 Seamless Nickel Tubing is manufactured according to ASTM standard in cold rolled and drawing in seamless process, finished in bright annealed (BA) condition. The nickel alloy tubes are uniform in quality and temper, smooth, commercially straight, and free of injurious imperfections.
The sizes of ASTM B163/ASME SB163 UNS N08825 825 nickel alloy seamless tubes are 3 in. (76.2 mm) and under in outside diameter with minimum wall thicknesses of 0.148 in. (3.76 mm) and under, and with average wall thicknesses of 0.165 in. (4.19 mm) and under. small diameter and light wall tube (converter sizes) are defined. ASTM B163/ASME SB163 U bent tubes are offered in accordance with the requirements of the specification.
ASTM B163/ASME SB163 UNS N08825 825 Seamless Nickel Alloy Tubes
| Standard | ASTM B163，ASME SB163 |
|---|---|
| Tube Type | Seamless Tube |
| Alloy | Nickel Alloy UNS N08825, 825 |
| Tube Form | Straight Tubes And U-Bend Tubes |
| Outside Diameter | 6 – 76.2 Mm |
| Thickness | 0.8 – 6 Mm |
ASTM B163 UNS N08825 Chemical Composition
ASTM B163 UNS N08825 is a nickel-iron-chromium alloy with 38.0 – 46.0% nickel and 19.5 – 23.5% chromium, and additions of molybdenum, copper and titanium. UNS N08825 has a high nickel content, sufficient to resist chloride ion stress corrosion cracking and a very stable austenite structure. UNS N08825 is ASTM equivalent alloy 825, and EN WNR 2.4858.
| Alloy | Nickel | Copper | Molybdenum | Manganese | Iron | Sulfur | Carbon | Silicon | Chromium | Aluminum | Titanium |
|---|---|---|---|---|---|---|---|---|---|---|---|
| UNS N08825 | 38.0 – 46.0 | 1.5 – 3.0 | 2.5-3.5 | 1.0 max | 22.0 min | 0.03 max | 0.05 max | 0.5 max | 19.5 – 23.5 | 0.2 max | 0.6 – 1.2 |
ASTM B163 UNS N08825 Mechanical Properties
| Material And Condition | Tensile Strength Min. Ksi(MPa) | Yield Strength(0.2% Offset)Min,Ksi(MPa) | Elongation In 2in. Or 50mm(Or 4D)Min. % |
|---|---|---|---|
| Annealed UNS N08825 | 58(586) | 35(241) | 30 |
Tolerances In Outside Diameter And Wall Thickness Of Condenser And Heat Exchanger Tubes
Outside Diameter and Wall Thickness—The permissible variations in the outside diameter and wall thickness of tube shall not exceed those prescribed in the Table below.
Length—When tube is ordered cut-to-length, the length shall not be less than that specified, but a variation of plus 1⁄8 in. (3.2 mm) will be permitted, except that for lengths over 30 ft (9.1 m), a variation of plus 1⁄4 in. (6.4 mm) will be permitted.
Straightness—Material shall be reasonably straight and free of bends or kinks.
| Material | Nominal Outside Diameter, In. (Mm) | Permissible Variations [Note(1)] | |||||
|---|---|---|---|---|---|---|---|
| Outside Diameter, In. (Mm) | Wall Thickness, % | ||||||
| Anerage Wall | Minimum Wall | ||||||
| + | – | + | – | + | – | ||
| UNS N02200, UNS N02201, And UNS N04400 | 1/2 To 5/8 (12.7 To 15.9),Excl | 0.005(0.13) | 0 | 12.5 | 12.5 | 25.0 | 0 |
| 8/5 To 1 1/2(15.9 To 38.1), Incl | 0.005(0.13) | 0.005(0.13) | 10.0 | 10.0 | 20.0 | 0 | |
| Over 1 1/2 To 3(38.1 To 76.2), Incl | 0.010(0.25) | 0.010(0.25) | 10.0 | 10.0 | 22.0 | 0 | |
| UNS N06600, UNS N066090, UNS N06045, UNS N06025, UNS N08800, UNS N08810, UNS N08811, UNS N08801, And UNS N08825 | 1/2 To 5/8 (12.7 To 15.9), Excl | 0.005(0.13) | 0.005(0.13) | 12.5 | 12.5 | 25.0 | 0 |
| 8/5 To 1 1/2 (15.9 To 38.1), Incl | 0.0075(0.19) | 0.0075(0.19) | 10.0 | 10.0 | 20.0 | 0 | |
| Over 1 1/2 To 3 (38.1 To 76.2), Incl | 0.010(0.25) | 0.010(0.25) | 10.0 | 10.0 | 22.0 | 0 | |
Tests
- Chemical Analysis E 76, E 1473
- Tension E 8
- Rounding Procedure E 29
- Rockwell Hardness E 18
- Grain Size E 112
- Hardness Conversion E 140
- Hydrostatic or Nondestructive Electric Test
Product Marking
Each bundle or shipping container shall be marked with the name of the material; condition (temper); this specification number; the size; gross, tare, and net weight; consignor and consignee address; contract or order number; or such other information as may be defined in the contract or order.