ASTM A269 TP304L Stainless Steel Bright Annealed Seamless Pipe
Gadewch neges
ASTM A269 TP304L?
ASTM A269 TP304L is a standard for low-carbon, austenitic stainless steel tubing designed for general corrosion-resistant applications, including those in high-temperature and high-pressure environments. "A269" refers to the ASTM standard for general-purpose stainless steel tubing, while "TP304L" designates the specific grade: a low-carbon variant of 304 stainless steel with higher chromium and nickel contents, providing excellent resistance to oxidation and general corrosion, and importantly, reducing sensitization during welding.
ASME SA 269 304L coil tubing is available in outside diameters ranging from 1/8 inch to 5 inches, with wall thicknesses from 0.015 inch to 0.320 inch.
Chemical Composition of ASTM A269 TP 304L Stainless Steel Seamless Tubes
|
C |
P |
S |
|||||
|
304L |
.035 |
2.00 |
.045 |
.030 |
1.00 |
18.0-20.0 |
8.0-13.0 |
ASTM A269 Grade TP304L Bright Annealed Tubes Mechanical Properties
| % | |||||
| 304L | 485 | 70 | 170 | 25 | 35 |
Physical Properties of SA 269 Gr 304L Heat Exchanger Tubes
| Thermal Conductivity (W/m.K) | Density (kilogram/meter3) | Specific Heat 0-1000C (J/kg.K) | Electrical Resistivity (n.m) | Mean Coefficient of Thermal Expansion (m/m/0C) | |||||
| at 5000C | at 1000C | 0-3150C | 0-1000C | 0-5380C | |||||
| 304L | 193 | 21.5 | 16.2 | 8000 | 500 | 720 | 17.8 | 17.2 | 18.4 |
ASTM A269 Gr TP304L Seamless Tube Wall Thickness
| + | – | |
| 3~18, t/D> 5% | 15 | 12.5 |
| 1/8-2 1 /2 | 20 | |
| >= 20, seamless, t/D<= 5% | 22.5 | |
| >= 20, welded | 17.5 | |
| ≥ 20, seamless, t/D> 5% | 15 | |
| 3~18, t/D<= 5% | 22.5 | |
Q1: What is the difference between 304 and 304L stainless steel in ASTM A269 pipes?
A1: 304L has lower carbon content (<=0.03%) compared to 304, which improves weldability and minimizes the risk of intergranular corrosion after welding.
Q2: Why is bright annealing important for stainless steel seamless pipes?
A2: Bright annealing eliminates oxidation, ensures a smooth mirror-like surface, and enhances cleanliness, which is critical for high-purity and hygienic applications.
Q3: What are the typical sizes available for ASTM A269 TP304L BA seamless pipes?
A3: Sizes range from OD 6 mm to 219 mm and WT 0.5 mm to 12 mm, with customized lengths available upon request.
Q4: In which industries are ASTM A269 TP304L BA seamless pipes most commonly used?
A4: Widely used in pharmaceutical, food & beverage, petrochemical, medical, and semiconductor industries.
Q5: Can you provide ASTM A269 TP304L BA seamless pipes with certification?
A5: Yes, we provide EN 10204 3.1/3.2 mill test certificates, ensuring full traceability and compliance with international standards.
