ASME SB677/ASTM B677 TP904L/NO8904 STAINLESS STEEL SEAMLESS PIPE
ASME SB677/ASTM B677 TP904L/NO8904 STAINLESS STEEL SEAMLESS PIPE
Overview
B677 TP904L refers to the ASTM B677 specification for seamless and welded tubes made from TP904L, which is a high-alloy austenitic stainless steel grade. TP904L offers excellent corrosion resistance, high strength, and good formability, making it suitable for various applications. Here are some key points about B677 TP904L:
- Corrosion Resistance: TP904L is highly resistant to various corrosive environments, including sulfuric acid, phosphoric acid, and chloride-containing solutions. This makes B677 TP904L tubes suitable for applications in industries such as chemical processing, petrochemical, and offshore environments.
- Heat Resistance: TP904L exhibits good heat resistance, allowing it to withstand high temperatures without losing its mechanical properties. This makes B677 TP904L tubes suitable for applications in heat exchangers, boilers, and other high-temperature environments.
- Seamless and Welded Tubes: The B677 specification covers both seamless and welded tubes made from TP904L. Seamless tubes offer higher strength and are generally preferred for critical applications, while welded tubes are more cost-effective and suitable for less demanding applications.
- Size Range: B677 TP904L tubes are available in various sizes and dimensions, ranging from small diameters to larger sizes, depending on the specific requirements of the application.
- Standards and Testing: B677 TP904L tubes are manufactured in accordance with the ASTM B677 specification and undergo various tests to ensure quality and compliance. These tests may include chemical analysis, mechanical properties testing, non-destructive testing (such as ultrasonic or eddy current testing), and visual inspection.
- Application Areas: B677 TP904L tubes find applications in industries such as chemical processing, petrochemical, oil and gas, pharmaceuticals, desalination plants, power generation, and more. They are used in heat exchangers, condensers, pipelines, and other components that require corrosion resistance and high strength.
When considering B677 TP904L tubes for a specific application, it's important to consult with industry professionals or engineers who can provide guidance on material compatibility, design considerations, and installation techniques to ensure optimal performance and longevity.
Chemical Composition
Grade |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
Cu |
|
|
904L |
min. |
- |
- |
- |
- |
- |
19.0 |
4.0 |
23.0 |
1.0 |
Mechanical Properties
Grade |
Tensile Strength (MPa) min |
Yield Strength 0.2% Proof (MPa) min |
Elongation (% in 50mm) min |
Hardness |
|
|
Rockwell B (HR B) |
Brinell (HB) |
||||
|
TP904L |
490 |
220 |
35 |
70-90 typical |
- |
|
Rockwell Hardness value range is typical only; other values are specified limits. |
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Physical Properties
Grade |
Density |
Elastic Modulus |
Mean Co-eff of Thermal Expansion (m/m/C) |
Thermal Conductivity |
Specific Heat 0-100C |
Elec Resistivity |
|||
|
0-100C |
0-315C |
0-538C |
At 20C |
At 500C |
|||||
|
904L |
8000 |
200 |
15 |
- |
- |
13 |
- |
500 |
850 |
Equivalent grades of TP904L
Grade |
UNS No |
Old British |
Euronorm |
Swedish SS |
Japanese JIS |
||
|
BS |
En |
No |
Name |
||||
|
TP904L |
N08904 |
904S13 |
- |
1.4539 |
X1NiCrMoCuN25-20-5 |
2562 |
- |
|
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted. |
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Supplementary Testing:
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|
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Applications
- Typical applications include
- Processing plant for sulphuric, phosphoric and acetic acids
- Pulp and paper processing
- Components in gas scrubbing plants
- Seawater cooling equipment
- Oil refinery components
- Wires in electrostatic precipitators
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