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ASTM A213 T5b seamless alloy tube is a type of seamless steel tube that complies with the ASTM A213/ASME SA213 standard and is made of T5b alloy steel. This standard covers seamless ferritic and austenitic steel tubes for boilers, superheaters, and heat exchangers, primarily designed for high-temperature service applications.
Super Steel Manufacturing Co.,Ltd is professional ASTM A213 T5b seamless alloy tube manufacturer, for more details, please contact:sales@super-steels.com
Chemical Composition (%) of ASTM A213 T5b Low Alloy Steel
The specific chemical composition of T5b alloy steel may vary slightly depending on manufacturing standards and requirements. It typically includes elements such as carbon (C), manganese (Mn), phosphorus (P), sulfur (S), silicon (Si), chromium (Cr), molybdenum (Mo), and sometimes nickel (Ni).
|
UNS Designation |
K41545 |
|
Carbon |
0.15 |
|
Manganese |
0.30–0.60 |
|
Phosphorus |
0.025 |
|
Sulfur |
0.025 |
|
Silicon |
1.00-2.00 |
|
Nickel |
… |
|
Chromium |
4.00-6.00 |
|
Molybdenum |
0.45-0.65 |
|
Vanadium |
… |
|
Boron |
… |
|
Niobium |
… |
|
Nitrogen |
… |
|
Aluminum |
… |
|
Tungsten |
… |
|
Other Elements |
… |
Mechanical Properties of ASTM A213 T5b Low Alloy Steel
ASTM A213 T5b low alloy steel tubes exhibit excellent mechanical properties, including tensile strength, yield strength, elongation, and hardness. These characteristics enable the tubes to endure high-temperature conditions while maintaining structural integrity and performance.
|
Tensile strength(min) |
Yield strength(min) |
Elongation |
Hardness, HB |
|
415Mpa |
205Mpa |
30% |
179 max |
Equivalent Designation
|
DIN |
EN |
BS |
NFA |
ASTM |
ASME |
|
– |
EN X11CrMo5 |
– |
ASTM A213 Grade T5b |
ASME SA 213 Grade T5b |
UNI 17102 |
Applications of ASTM A213 T5b Seamless Alloy Tube
ASTM A213 T5b seamless alloy tubes are widely used in high-temperature environments such as boilers, superheaters, and heat exchangers. These tubes are designed for transporting fluids under elevated temperatures and pressures, ensuring durability and efficiency in demanding applications.
Key Characteristics and Manufacturing Requirements
Grades within the ASTM A213 T5b specification that include the letter "H" have distinct requirements compared to similar grades without it. These additional requirements enhance creep-rupture strength, making them more suitable for prolonged high-temperature exposure.
ASTM A213 T5b tubes are produced using a seamless manufacturing process and can be either hot-finished or cold-finished, as specified. Grade TP347HFG must be cold-finished. Heat treatment is conducted separately from any heating used for hot forming. Ferritic alloy and ferritic stainless steels must undergo reheating, while austenitic stainless steel tubes are supplied in a heat-treated condition. Alternatively, immediately after hot forming, if the tube temperature remains above the minimum solution temperature, they may be quenched in water or rapidly cooled by other means.
To ensure quality and performance, ASTM A213 T5b tubes undergo various mechanical and nondestructive tests, including tension tests, hardness tests, flattening tests, and flaring tests. Additionally, each tube is subjected to either a nondestructive electric test or a hydrostatic test to verify integrity and reliability.
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