Nickel-based seamless tube and pipe products are widely used in high-temperature, high-pressure, and corrosive industrial environments. Compared with ordinary stainless steel pipes, nickel alloy pipes offer superior corrosion resistance, oxidation resistance, and mechanical strength.
This article provides a detailed overview of nickel alloy seamless pipes, including common grades, standards, chemical composition, mechanical properties, and industrial applications.
Common Nickel Alloy Pipe Grades
The following grades are commonly used in industrial applications:
|
UNS Grade
|
Trade Name
|
|
UNS N02200
|
Nickel 200
|
|
UNS N04400
|
Monel 400
|
|
UNS N06600
|
Inconel 600
|
|
UNS N06601
|
Inconel 601
|
|
UNS N06625
|
Inconel 625
|
|
UNS N06690
|
Inconel 690
|
|
UNS N08020
|
Alloy 20
|
|
UNS N08800
|
Incoloy 800
|
|
UNS N08810
|
Incoloy 800H
|
|
UNS N08811
|
Incoloy 800HT
|
|
UNS N10276
|
Hastelloy C-276
|
|
UNS N10665
|
Hastelloy B-2
|
|
UNS N10673
|
Hastelloy B-3
|
Manufacturing Standards of Nickel-Based Seamless Tube and Pipe
Chinese Standard
GB/T 15008
GB/T 15011
GB/T 15062
ASTM / ASME Standards
ASTM B161 / ASME SB161
ASTM B163 / ASME SB163
ASTM B407 / ASME SB407
ASTM B423 / ASME SB423
ASTM B165 / ASME SB165
ASTM B167 / ASME SB167
ASTM B444 / ASME SB444
ASTM B668 / ASME SB668
These standards specify:
Chemical composition
Mechanical properties
Manufacturing tolerance
Heat treatment
Inspection requirements
Mechanical Properties of Nickel-Based Seamless Tube & Pipe
The following table is organized according to the mechanical property section shown in the image.
|
UNS Grade
|
Condition
|
Tensile Strength (MPa)
|
Yield Strength (MPa)
|
Elongation (%)
|
HRB
|
|
UNS N02200
|
Annealed
|
379
|
103
|
40
|
—
|
|
UNS N02200
|
Stress-relieved
|
448
|
276
|
15
|
B65
|
|
UNS N04400 (Monel400)
|
Annealed
|
483
|
193
|
35
|
—
|
|
UNS N04400 (Monel400)
|
Stress-relieved
|
586
|
378
|
15
|
B65
|
|
UNS N06600 (Inconel600)
|
—
|
552
|
241
|
30
|
—
|
|
UNS N06601 (Inconel601)
|
—
|
552
|
207
|
30
|
—
|
|
UNS N06625 (Inconel625) Gr.1
|
—
|
827
|
414
|
30
|
—
|
|
UNS N06625 (Inconel625) Gr.2
|
—
|
690
|
276
|
30
|
—
|
|
UNS N06690 (Inconel690)
|
—
|
586
|
241
|
30
|
—
|
|
UNS N08020 (Alloy20)
|
—
|
551
|
241
|
30
|
—
|
|
UNS N08028 (Alloy28)
|
—
|
500
|
214
|
40
|
—
|
|
UNS N08800 (Incoloy800) Annealed
|
—
|
518
|
207
|
30
|
—
|
|
UNS N08800 (Incoloy800) Cold-worked
|
—
|
572
|
324
|
30
|
—
|
|
UNS N08810 (Incoloy800H)
|
—
|
448
|
172
|
30
|
—
|
|
UNS N08811 (Incoloy800HT)
|
—
|
448
|
172
|
30
|
—
|
|
UNS N08825 (Incoloy825)
|
—
|
241
|
586
|
30
|
—
|
|
UNS N06022 (Hastelloy C-22)
|
—
|
690
|
310
|
45
|
—
|
|
UNS N10276 (Hastelloy C-276)
|
—
|
690
|
283
|
40
|
—
|
|
UNS N10665 (Hastelloy B-2)
|
—
|
760
|
350
|
40
|
—
|
|
UNS N10673 (Hastelloy B-3)
|
—
|
760
|
350
|
40
|
—
|
Chemical Composition of Nickel Alloy Seamless Pipes
The following chemical composition table is structured according to the image content.
|
Grade
|
Ni
|
Cu
|
Mo
|
Fe
|
Mn
|
C
|
Si
|
S
|
Cr
|
|
UNS N02200
|
99.0
|
0.25
|
—
|
0.40
|
0.35
|
0.15
|
0.35
|
0.001
|
—
|
|
UNS N04400 (Monel400)
|
63.0
|
28.0-34.0
|
—
|
2.50
|
2.00
|
0.30
|
0.50
|
0.024
|
—
|
|
UNS N06600 (Inconel600)
|
≥72.0
|
0.50
|
—
|
6.0-10.0
|
1.00
|
0.15
|
0.50
|
0.015
|
14.0-17.0
|
|
UNS N06601 (Inconel601)
|
58.0-63.0
|
1.00
|
—
|
—
|
1.00
|
0.10
|
0.50
|
0.015
|
21.0-25.0
|
|
UNS N06625 (Inconel625)
|
58.0
|
—
|
8.0-10.0
|
5.0
|
0.50
|
0.10
|
0.50
|
0.015
|
20.0-23.0
|
|
UNS N06690 (Inconel690)
|
58.0
|
0.50
|
—
|
7.0-11.0
|
0.50
|
0.05
|
0.50
|
0.015
|
27.0-31.0
|
|
UNS N08020 (Alloy20)
|
32.0-38.0
|
3.0-4.0
|
2.0-3.0
|
Balance
|
2.00
|
0.07
|
1.00
|
0.035
|
19.0-21.0
|
|
UNS N08028 (Alloy28)
|
30.0-34.0
|
0.6-1.4
|
3.0-4.0
|
Balance
|
2.50
|
0.03
|
1.00
|
0.030
|
26.0-28.0
|
|
UNS N08800 (Incoloy800)
|
30.0-35.0
|
0.75
|
—
|
39.5 min
|
1.50
|
0.10
|
1.00
|
0.015
|
19.0-23.0
|
|
UNS N08810 (Incoloy800H)
|
30.0-35.0
|
0.75
|
—
|
39.5 min
|
1.50
|
0.05-0.10
|
1.00
|
0.015
|
19.0-23.0
|
|
UNS N08811 (Incoloy800HT)
|
30.0-35.0
|
0.75
|
—
|
39.5 min
|
1.50
|
0.06-0.10
|
1.00
|
0.015
|
19.0-23.0
|
|
UNS N08825 (Incoloy825)
|
38.0-46.0
|
1.5-3.0
|
2.5-3.5
|
22.0 min
|
1.00
|
0.05
|
0.50
|
0.030
|
19.5-23.5
|
|
UNS N06022 (Hastelloy C-22)
|
Balance
|
—
|
12.5-14.5
|
2.0-6.0
|
0.50
|
0.015
|
0.08
|
0.020
|
20.0-22.5
|
|
UNS N10276 (Hastelloy C-276)
|
Balance
|
—
|
15.0-17.0
|
4.0-7.0
|
1.00
|
0.01
|
0.08
|
0.030
|
14.5-16.5
|
|
UNS N10665 (Hastelloy B-2)
|
Balance
|
—
|
26.0-30.0
|
2.0
|
1.00
|
0.02
|
0.10
|
0.030
|
1.0
|
|
UNS N10673 (Hastelloy B-3)
|
65.0
|
—
|
27.0-32.0
|
1.0-3.0
|
3.00
|
0.01
|
0.10
|
0.010
|
1.0-3.0
|
Main Applications of Nickel Alloy Seamless Pipes
Oil & Gas Industry
Nickel alloy seamless pipes are widely used in:
Offshore platforms
Sour gas transportation
High-pressure pipelines
Subsea systems
Chemical Processing Industry
Applications include:
Acid transportation systems
Chemical reactors
Heat exchangers
Pressure vessels
Power Generation Industry
Nickel alloy tubes are commonly used in:
Boiler tubes
Superheaters
Nuclear power systems
High-temperature steam pipelines
Marine Engineering
Nickel-based pipes provide excellent seawater corrosion resistance and are widely used in shipbuilding and offshore structures.
Advantages of Nickel-Based Seamless Tube & Pipe
Excellent Corrosion Resistance
Nickel alloys perform well in:
Sulfuric acid
Hydrochloric acid
Chloride environments
Seawater systems
High Temperature Strength
Many nickel alloys maintain stable mechanical properties at temperatures above 800°C.
Long Service Life
These alloy pipes offer excellent resistance to:
Oxidation
Scaling
Thermal fatigue
Stress corrosion cracking
FAQ
What is nickel alloy seamless pipe used for?
It is mainly used in oil & gas, chemical plants, power generation, and marine engineering.
Which nickel alloy is suitable for seawater?
Monel 400 is commonly used for seawater applications because of its excellent corrosion resistance.
What is the advantage of seamless nickel alloy pipe?
Seamless pipes provide higher pressure resistance and better structural reliability.
Are nickel alloy pipes suitable for high temperatures?
Yes. Inconel and Incoloy grades are widely used in elevated-temperature environments.
Which standards are commonly used?
Common standards include ASTM B161, ASTM B163, ASTM B167, ASTM B407, and ASTM B444.a
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