ASTM B163 N04400 Alloy Steel Tube for Condenser and Heat Exchanger Application
ASTM B163 N04400 alloy steel tube is a high-performance, multi-purpose corrosion-resistant alloy pipe. The wall thickness is usually between 1.24-59.54mm, and the outer diameter ranges from 21.3-1219.2mm. The main chemical components are nickel (≥ 63%), copper (28.0%~34.0%), iron (≤ 2.5%), carbon (≤ 0.30%), manganese (≤ 2.0%), silicon (≤ 0.50%), and sulfur (≤ 0.024%). These unique chemical components endow it with excellent corrosion resistance.
ASTM B163 Alloy Steel Tube Chemical Composition
|
GRA.
|
ASTM B163 Alloy Steel Tube CHEMICAL COMPOSITION % MAXIMUM |
| NI |
CU |
IR |
MN |
C |
SI |
S |
| N02200 |
99.0 |
0.25 |
0.40 |
0.35 |
0.15 |
0.35 |
0.01 |
| N04400 |
63.0 |
28.0-34.0 |
2.5 |
2.0 |
0.3 |
0.5 |
0.024 |
In terms of mechanical properties, ASTM B163 N04400 alloy steel tubes have good plasticity and toughness, can maintain low wear rates under various working conditions, and have good formability, which can be processed by cutting, welding, heat treatment and other processing techniques. N04400 alloy steel tubes have excellent corrosion resistance in media such as hydrofluoric acid, fluorine gas, hydrochloric acid, sulfuric acid, and their derivatives, and are more corrosion-resistant than copper based alloys in seawater. In addition, it is resistant to corrosion from neutral solutions, water, atmosphere, organic compounds, etc., and does not produce stress corrosion cracking. With its high temperature strength and good oxidation resistance, N04400 alloy steel tube can work stably in high temperature and harsh environments. The maximum temperature for continuous operation in the air is generally around 600 ℃.
During use, it should be noted that N04400 alloy steel tubes cannot withstand corrosion from substances such as nitric oxide, nitrous acid, sulfur dioxide, and hypochlorite. Therefore, they should not be used in environments that are exposed to these elements.
ASTM B163 N04400 Alloy Steel Heat Treatment
|
Material and Condition
|
Tensile Strength,
min, ksi (MPa)
|
Yield Strength
(0.2 % Offset),
min, ksi (MPa)
|
Elongation in 2 in.
or 50 mm (or 4 D)
min, %
|
| Annealed |
70 (483)
|
|
35
|
|
Stress-relieved
|
85 (586)
|
|
15
|
ASTM B163 N04400 Alloy Steel Tube Application:
- Chemical equipment: manufacturing pumps, valves, containers, etc. These equipment need to withstand the erosion of various corrosive media in the chemical production process, and ASTM B163 N04400 alloy steel tubes can meet these needs due to their excellent corrosion resistance.
- Marine Engineering: In the marine environment, ASTM B163 N04400 alloy steel tubes are widely used as structural materials for ships and offshore platforms due to their extremely high corrosion resistance. For example, it can be used as a material for seawater heat exchangers and evaporators, as well as equipment materials for seawater usage environments.
- Oil and gas industry: This alloy steel seamless tube is also commonly used in drilling equipment and pipelines because it can maintain stability and corrosion resistance in high-temperature and high-pressure oil extraction environments.
- Nuclear power generation: In the nuclear industry, ASTM B163 N04400 alloy steel tubes are used to manufacture uranium extraction and isotope separation equipment, as well as key components such as pressure vessels in nuclear reactors.
- Other fields: This alloy steel seamless tube is also widely used in seamless water tubes and steam tubes in power plants; Equipment in sulfuric acid and hydrochloric acid environments; Crude oil stills, processing vessels, and pipelines; Boiler feedwater heaters and other heat exchangers, etc.
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