ASME SA312 TP304L austenitic stainless steel heat exchanger tubes
ASME SA312 TP304L austenitic stainless steel heat exchanger tubes
ASME SA312 TP304L is the standard for low-carbon austenitic stainless steel tubing for heat exchangers. Its corrosion resistance is excellent, especially after welding, due to reduced carbide precipitation. Its chromium-nickel alloy resists moderate oxidizing and reducing media, atmospheric corrosion, and intergranular corrosion, making it an ideal choice for high-temperature and high-pressure applications in corrosive environments. TP304L tubing is available in both seamless and welded versions, in a variety of sizes and wall thicknesses to meet specific application needs.
What is SA312 TP304 material?
A312 TP304 is an austenitic alloy grade designed with a high-quality nickel and chromium composition. ASTM A312 TP304 alloy offers excellent resistance to corrosion and oxidizing media in stress-inducing environments. This versatile alloy grade also possesses excellent mechanical properties.
ASME SA 312 304L Tubing Chemical Composition
| ASTM A312 TP304L PIPE | UNS | Cr | C | Mn | Ni | P | S | Si |
|---|---|---|---|---|---|---|---|---|
| ASTM A312 TP304L | S30403 | 18.0-20.0 | 0.035 | 2 | 8.0-13.0 | 0.045 | 0.03 | 1 |
SA 312 304L Heat Exchanger Tubes Mechanical Properties
| Material | Temperure | Yield Strength | Tensile Strength | Heat | Elongation %, Min |
|---|---|---|---|---|---|
| Min.º F(º C) | Ksi (MPa), Min. | Ksi (MPa), Min. | Treatment | ||
| ASTM A312 TP304L | 1900 (1040) | 25(170) | 70(485) | Solution | 35 |
SA 312 TP 304L Tubing Physical Properties
| Grade | Thermal Conductivity (W/m.K) | Mean Coefficient of Thermal Expansion (m/m/0C) | Density (kg/m3) | Specific Heat 0-1000C (J/kg.K) | Elastic Modulus (GPa) | Electrical Resistivity (n.m) | |||
|---|---|---|---|---|---|---|---|---|---|
| at 1000C | at 5000C | 0-1000C | 0-3150C | 0-5380C | |||||
| ASTM A312 TP304L | 16.2 | 21.5 | 17.2 | 17.8 | 18.4 | 8000 | 500 | 193 | 720 |
Key Features of 304L Heat Exchanger Tubes
Low Carbon Content: The "L" in TP304L designates a low-carbon version of standard 304 stainless steel. The lower carbon content minimizes carbide precipitation during welding, thereby preventing intergranular corrosion and making it suitable for harsh environments.
Austenitic Stainless Steel: A chromium-nickel alloy, it is often referred to as "18/8" stainless steel due to its approximately 18% chromium and 8% nickel content.
Excellent Corrosion Resistance: It resists general atmospheric corrosion and moderately oxidizing and reducing media.
Good Mechanical Properties: The alloy exhibits excellent strength and toughness even at elevated temperatures and maintains good durability in high-stress and high-pressure applications.
Production and Types: Seamless Tube: Produced without welding, it offers higher inherent strength and a smoother surface, enhancing its corrosion resistance.
Welded Tube: Formed and welded from strip or plate of the same steel grade.
Heavily Cold Worked (HCW) Tube: A welded tube that has undergone extensive cold working to increase its strength and load-bearing capacity.
Applications
Heat exchangers: Primarily used in corrosive environments, capable of withstanding high temperatures and pressures.
Other Industrial Applications: Used in various industries, including food processing, chemical transportation, and building components.
Gnee Steel specializes in the production and sale of a wide range of stainless steel products, including 304, 316, 321, 904, 904L, 2205 Duplex, 2205 Duplex, and 316L stainless steel. Gnee Steel's products are widely used in the kitchen, aerospace, chemical, power, automotive, and nuclear energy sectors. We also provide custom stainless steel solutions tailored to customer needs. For stainless steel pricing or custom alloy solutions, please email ru@gneesteelgroup.com for a quote.