Standard & Grade : ASTM A179
Ends:Square Ends/Plain Ends (straight cut, saw cut, torch cut), Beveled/Threaded Ends
Delivery state: Annealed, normalized, tempered. surface oiled, black painted, shot blasted, hot dipped galvanized.
Manufacturing and heat treatment:
- Manufacturing process: Steel pipes need to be manufactured by seamless process and cold-drawn.
- Heat treatment: The steel pipe needs to be heat treated after the final cold drawing, and the temperature is not less than 1200°F (650°C).
Seamless steel pipe A179 standard has excellent processing and mechanical properties, so it has a wide range of applications in various fields:
- boiler and heat exchanger: A179 standard seamless steel pipe is often used in boilers and heat exchangers, used to transfer heat, with good high temperature and pressure resistance.
- Chemical industry: In the chemical industry, A179 standard seamless steel pipe is widely used to transport chemical media, such as acid, alkali, etc., requiring the pipeline to have good corrosion resistance .
- Oil and gas transmission: Seamless steel pipe A179standard is also commonly used in oil and gas transmission pipelines, requiring the pipeline to have good tightness and pressure resistance.
- Machinery manufacturing: In the field of machinery manufacturing,A179 standard seamless steel pipe is widely used to manufacture all kinds of mechanical parts, such as bearing casing, hydraulic cylinder pipe and so on.
Chemical composition and Mechanical performance:
|
Standard |
Chemical Composition Max(%) |
Mechanical Properties |
||||||||||
|
Grade |
c |
Si |
Mn |
P |
S |
Mo |
Cr |
V |
Tensile STrength (Mpa) |
Yield STrength(Mpa) |
Elongation(%) |
|
|
ASTM |
A192 |
0.06-0.18 |
0.25 |
0.27-0.63 |
≤0.035 |
≤0.035 |
/ |
/ |
/ |
≥325 |
≥180 |
≥35 |
|
A179 |
||||||||||||
|
OD In (mm) |
+ |
- |
WT In (mm) |
+ |
- |
|
<1(25.4) |
0.1 |
0.1 |
≤1.1/2(38.1) |
20% |
0 |
|
1∼1.1/2(25.4∼38.1) |
0.15 |
0.15 |
>1.1/2(38.1) |
22% |
0 |
|
>1.1/2∼<2(38.1∼50.8) |
0.2 |
0.2 |
|||
|
2∼<2.1/2(50.8∼63.5) |
0.25 |
0.25 |
|||
|
2.1/2∼<3(63.5∼76.2) |
0.3 |
0.3 |
|||
|
3∼4(76.2∼101.6) |
0.38 |
0.38 |
|||
|
>4∼7.1/2(101.6∼190.5) |
0.38 |
0.64 |
|||
|
>7.1/2∼9(190.5∼228.6) |
0.38 |
1.14 |
|
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