ASTM B423 ASME SB423 UNS N08825 Incoloy 825 Seamless Pipe and Tube
Nickel-Iron-Chromium Alloy Pipes & Tubes for Corrosive Service
ASTM B423 / ASME SB423 UNS N08825 seamless pipes and tubes, commonly known as Incoloy 825 pipes and tubes, are nickel-iron-chromium alloy products designed for corrosion-resistant service in both oxidizing and reducing environments. With the addition of molybdenum and copper, Incoloy 825 offers outstanding resistance to sulfuric acid, phosphoric acid, chloride stress corrosion cracking, and pitting.
ASTM B423 Incoloy 825 seamless tubing and piping are widely used in chemical processing, oil & gas, offshore, nuclear fuel reprocessing, and pollution control industries.
We are a professional ASTM B423 UNS N08825 Seamless pipe,ASTM B 163 UNS N08825 Incoloy 825 pipe manufacturer and exporter in China.
Material Grade: UNS N08825 (Incoloy® 825)
UNS N08825, also known as Incoloy 825, is a stabilized nickel-based alloy alloyed with chromium, molybdenum, copper, and titanium to provide excellent resistance to a wide range of corrosive media.
Key Properties of Incoloy 825 Pipes & Tubes
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Excellent resistance to sulfuric and phosphoric acids
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Outstanding resistance to chloride-induced stress corrosion cracking
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Good resistance to pitting and crevice corrosion
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Stable mechanical properties over a wide temperature range
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Good weldability and fabrication characteristics
Designation: ASTM-b423 11
Standard Specification for Nickel-Iron-Chromium-Molybdenum-Copper Alloy (UNS N08825, N08221, and N06845) Seamless Pipe and Tube
1.1 This specification2 covers nickel-iron-chromiummolybdenum-copper alloys (UNS N08825, N08221, and
N06845)3 in the form of cold-worked and hot-finished seamless pipe and tube intended for general corrosive service. The
general requirements for pipe and tube are covered in Specification B829.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
SB163 SB423 N08825 Nickel Alloy Seamless Tubes Tubing Pipes is a nickel-iron-chromium alloy with additions of molybdenum and copper. This nickel steel alloy’s chemical composition is designed to provide exceptional resistance to many corrosive environments. It is similar to alloy 800 but has improved resistance to aqueous corrosion. It has excellent resistance to both reducing and oxidizing acids, to stress-corrosion cracking, and to localized attack such as pitting and crevice corrosion. Alloy 825 Incoloy 825 is especially resistant to sulfuric acids and phosphoric acids. This nickel steel alloy is used for chemical processing, pollution-control equipment, oil and gas well piping, nuclear fuel reprocessing, acid production, and pickling equipment.
Grade:
| SEAMLESS PIPE / TUBING | WELDED PIPE / TUBING | |
|---|---|---|
| Incoloy 800 | ASTM B 407 / 163 | ASTM B 514 / 515 |
| ASME SB 407 / 163 | ASME SB 514 / 515 | |
| Incoloy 800H | ASTM B 407 / 163 | ASTM B 514 / 515 |
| ASME SB 407 / 163 | ASME SB 514 / 515 | |
| Incoloy 800HT | ASTM B 407 / 163 | ASTM B 514 / 515 |
| ASME B 407 / 163 | ASME SB 514 / 515 | |
| Incoloy 825 | ASTM B 423 / 163 | ASTM B 705 / 704 |
| ASME SB 423 / 163 | ASME SB 705 / 704 |
ASTM B163 B423 ASME SB163 SB423 N08825 Nickel Alloy Seamless Tubes Tubing Pipes Chemical composition:
|
Alloy
|
%
|
Ni
|
Cr
|
Fe
|
C
|
Mn
|
Si
|
Cu
|
Mo
|
Al
|
Ti
|
S
|
|
N08825
|
Min. |
38
|
19.5
|
balance
|
1.5
|
2.5
|
0.6
|
|||||
| Max. |
46
|
23.5
|
balance
|
0.05
|
1.0
|
0.5
|
3.0
|
3.5
|
0.2
|
1.2
|
0.03
|
ASTM B163 B423 ASME SB163 SB423 N08825 Nickel Alloy Seamless Tubes Tubing Pipes Physical properties
| Density / Specific Gravity | 8.1 kg/m³ 0.30 lb/in³ |
| Melting point | 1370-1400℃ |
ASTM B163 B423 ASME SB163 SB423 N08825 Nickel Alloy Seamless Tubes & Pipes Alloy minimum mechanical properties in the room temperature
|
Alloy state
|
Tensile strength
Rm N/mm²
|
Yield strength
R P0. 2N/mm²
|
Elongation
A 5 %
|
Brinell hardness
HRB Max
|
|
N08825
Hot Finished |
517
|
172
|
30
|
200
|
|
N08825
Cold Finished |
586
|
241
|
30
|
200
|
Size Range & Specifications
Seamless Pipe
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Outside Diameter: 21.3 mm – 323.9 mm (1/2″ – 12″)
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Wall Thickness: SCH 10 – SCH 160 / XXH
Seamless Tube
-
Outside Diameter: 6.35 mm – 114.3 mm (1/4″ – 4-1/2″)
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Wall Thickness: 0.5 mm – 9.65 mm
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Length: Random or fixed length
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Delivery Condition: Solution annealed
Heat Treatment
ASTM B423 Incoloy 825 seamless pipes and tubes are supplied in the solution annealed condition, followed by rapid cooling to achieve optimum corrosion resistance and structural stability.
Testing & Inspection
ASTM B423 / ASME SB423 UNS N08825 products are tested in accordance with strict quality requirements, including:
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Chemical analysis
-
Tensile testing
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Eddy current or hydrostatic testing
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Dimensional inspection
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Surface inspection
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Certification: EN 10204 3.1 / 3.2 (upon request)
Applications of Incoloy 825 Seamless Pipes & Tubes
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Chemical and petrochemical processing plants
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Oil & gas production and refining
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Offshore and marine systems
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Nuclear fuel reprocessing
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Acid pickling equipment
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Heat exchangers and condensers
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Pollution control and FGD systems
Incoloy 825 vs Inconel 625 Pipes & Tubes
| Item | Incoloy 825 | Inconel 625 |
|---|---|---|
| Sulfuric Acid Resistance | Excellent | Moderate |
| Chloride SCC Resistance | Excellent | Excellent |
| High-Temperature Strength | Moderate | Higher |
| Typical Use | Chemical & acid service | Offshore & high-temp |
ASTM B423 / ASME SB423 UNS N08825 Incoloy 825 seamless pipes and tubes offer exceptional corrosion resistance, mechanical reliability, and long service life in aggressive chemical and offshore environments. Fully compliant with ASTM and ASME standards, Incoloy 825 piping and tubing is a proven solution for acid handling, oil & gas, and critical process applications.
