TP304L Seamless Stainless Steel Tube is a low-carbon, corrosion-resistant tubes known for their excellent durability, weldability, and performance in demanding environments. ① STANDARD: ASTM A213/ EN10216-5/ ASTM A249/ ASTM A269/ GOST 9940 /GOST 9941...② OD RANGE : 6-257MM③ THICKNESS RANGE: 1-35 MM
|
Grade |
C |
SI |
Mn |
Cr |
Ni |
S |
P |
|
304 |
≤ 0.08 |
≤1.00 |
≤2.00 |
18.00-20.00 |
8.00-11.00 |
≤0.03 |
≤0.045 |
|
304L |
≤0.035 |
≤1.00 |
≤2.00 |
18.00-20.00 |
8.00-12.00 |
≤0.03 |
≤0.045 |
|
304H |
0.04-0.10 |
≤1.00 |
≤2.00 |
18.00-20.00 |
8.00-11.00 |
≤0.03 |
≤0.045 |
|
Material |
Tensile Strength ksi(MPa) |
Yield Strength ksi(MPa) |
Elongation (%) |
Hardness Brinell/Vickers |
Hardness Rockwell |
|
304 |
≥75(515) |
≥30(205) |
≥ 35 |
≤192HBW/200HV |
≤90HRB |
|
304L |
≥70(485) |
≥25(170) |
≥ 35 |
≤192HBW/200HV |
≤90HRB |
|
304H |
≥75(515) |
≥30(205) |
≥ 35 |
≤192HBW/200HV |
≤90HRB |
304L stainless steel pipes have several applications across industries. They are often used in the following areas:
Remember that 304L stainless steel combines corrosion resistance, ease of fabrication, and broad applicability, making it a valuable material in various sectors!
304L has good resistance in:Organic acids at moderate temperatures,Salt solutions, e.g. sulphates, sulphides and sulphites, Caustic solutions at moderate temperatures, Oxidizing acids like nitric acid
The stainless steel alloys AISI 304 and AISI 304L are the best known and most widely used chromium-nickel steels. Their excellent corrosion resistance, high strength and low carbon content make these austenitic steels particularly suitable for applications requiring welding.
304, 304H and 304L all possess the same nominal chromium and nickel content and thus possess the same corrosion resistance, ease of fabrication and weldability. The difference between 304, 304H and 304L is the carbon content which is >0.03, >0.05 and <0.03 respectively.
The carbon content of 304H (UNS S30409) is restricted to 0.04–0.10%, which provides optimal high temperature strength.
The carbon content of 304L (UNS 30403) is restricted to a maximum of 0.03%, which prevents sensitization during welding. Sensitization is the formation of chromium carbides along grain boundaries when a stainless steel is exposed to temperatures in the approximate range of 900–1,500 °F (480–820 °C). The subsequent formation of chromium carbide results in reduced corrosion resistance along the grain boundary leaving the stainless steel susceptible to unanticipated corrosion in an environment where 304 would be expected to be corrosion resistant. This grain boundary corrosive attack is known as intergranular corrosion.
The carbon content of 304 (UNS 30400) is restricted to a maximum of 0.08%. Thus 304 is not useful for corrosive applications where welding is required such as tanks and pipes where corrosive solutions are involved, thus, 304L is preferred. And its lack of a minimum carbon content is not ideal for high temperature applications where optimal strength is required, thus, 304H is preferred. Thus 304 is typically restricted to bars that will be machined into components where welding is not required or thin sheets that are formed in articles such as kitchen sinks or cookware that are also not welded.
Carbon content has a strong influence on room temperature strength and thus the specified minimum tensile properties of 304L are 5 kilopounds per square inch (34 MPa) lower than for 304 (515 MPa). However, nitrogen also has a strong influence on room temperature strength and a tiny addition of nitrogen produces 304L with the same tensile strength as 304. Thus, practically all 304L is produced as dual certified 304/304L, meaning it meets the minimum carbon content of 304L and also meets the minimum tensile strength of 304.
TP309 Seamless Stainless Steel Pipe are high-performance tubing solutions designed for superior heat and corrosion resistance in demanding environments. ① STANDARD: ASTM A312/ ASTM A249/ ASTM A269/ EN10216-5/GOST 9940 /GOST 9941...② OD RANGE : 6-1016 MM③ THICKNESS RANGE: 1-65 MM
Seamless 654SMO Super Stainless Steel Tube UNS S32654, W. Nr. 1.4652) is a high-performance super austenitic stainless steel alloy, often classified as a "super stainless steel" due to its exceptional corrosion resistance and mechanical strength. Developed for the most demanding environments, it features unusually high levels of chromium (24%), molybdenum (7-8%), nickel (23%), and nitrogen (0.45-0.55%), enabling pitting resistance equivalent number (PREN) values exceeding 50—comparable to top nickel-based alloys like Hastelloy. The seamless design ensures superior integrity for high-pressure, high-temperature, and corrosive applications, avoiding weld-related vulnerabilities. It is twice as strong as conventional austenitic grades like 304 or 316 while maintaining excellent ductility and toughness.① STANDARD: ASTM A312/EN10216-5/GBT14976.② OD RANGE : 6.35-257MM③ THICKNESS RANGE: 0.89-35MM
254SMO Seamless Stainless Steel Tube is a high-performance tubing solution designed for extreme environments, offering exceptional resistance to corrosion, pitting, and acidic conditions—ideal for marine, chemical, and offshore applications. ① STANDARD: ASTM A213/ ASTM A249/ ASTM A269/ ASTMA270/EN10216-5/GOST 9940 /GOST 9941...② OD RANGE : 6-257MM③ THICKNESS RANGE: 1-35 MM
253MA Seamless Stainless Steel Pipe is a tube which features seamless construction, excellent heat and corrosion resistance, and long-lasting durability. ① STANDARD: EN10216-5/ ASTM A312/ ASTM A249/ ASTM A269/EN10216-5/ GOST 9940 /GOST 9941...② OD RANGE : 6-706MM③ THICKNESS RANGE: 1-65 MM
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