ASTM A423 Grade 3 Seamless Tube is a low-alloy steel tubinghigh-temperature and moderate-pressure service, such as in heaters, heat exchangers, boilers, and air preheaters.
high mechanical strength and long-term durability, making it ideal for industrial and structural applications.
| 1/8, 3/16, 1/4, 1/2 " | 2 to 12.5 mm | |
| ASTM A847 | 6000/12000 mm |
Mechnical property for A423 Grade 3 seamless pipe
|
Yield strength (Mpa) Min. |
Tensile strength (Mpa) Min. |
Elongation in 50mm >=,% |
|
230 |
380 |
35 |
Chemical composition for A423 Grade 3 seamless pipe (Heat Analysis Max%)
|
Main chemical elements composition of A423 Grade 3 |
||||||||
|
C |
P |
S |
||||||
|
0.06 |
0.55 |
0.70-1.40 |
0.02 |
0.02 |
0.25-0.45 |
0.20 |
0.50 |
0.05-0.15 |
|
3.2<=OD＜25.4 |
±0.10 |
|
25.4<=OD<=38.1 |
±0.15 |
|
38.1＜OD＜50.8 |
±0.20 |
|
50.8<=OD＜63.5 |
±0.25 |
|
63.5<=OD＜76.2 |
±0.30 |
|
76.2 |
±0.38 |
Applications of ASTM A423 Grade 3 Seamless Tube
ASTM A423 Grade 3 seamless tubes are widely used in industries that demand both high-temperature strength and superior corrosion resistance. The alloy's ability to withstand oxidation, scaling, and corrosion under severe atmospheric and process conditions makes it a preferred material for long-term service.
400–500℃. The material's stable oxide layer minimizes corrosion and scaling, ensuring reliable heat transfer and reduced maintenance costs.
A423 Grade 3 tubes are suitable for use in high-pressure boilers, where resistance to thermal fatigue and oxidation is critical. The material maintains mechanical integrity even under cyclic heating and cooling conditions.
In refineries, the tubes are used to transport hot process gases and fluids. Their enhances resistance to sulfur-bearing environments, hydrogen attack, and stress corrosion cracking.
, A423 Grade 3 offers excellent performance in both coal-fired and gas turbine power plants. Its weldability and impact toughness ensure safe and efficient system operation.
, the tubes provide durable performance in high-temperature pipelines carrying gases such as CO₂, H₂, and hydrocarbons, extending service life and reducing downtime.
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