ASTM A269 precision stainless steel pipe is manufactured to the strict requirements of the ASTM A269 standard, which covers seamless and welded austenitic stainless steel tubing for general corrosion-resistant and high-temperature service. This pipe offers excellent dimensional accuracy, clean internal surfaces, and reliable mechanical properties, making it ideal for instrumentation, medical, and other precision applications.
Key Features:
- Compliant with ASTM A269 standard
- Seamless or welded & drawn construction
- Tight tolerance: OD up to ±0.05mm (precision grades available)
- Smooth internal surface – no scale or contamination
- Bright annealed finish
- Suitable for bending, flaring, and swaging
Product Specifications
| Parameter |
Details |
| Applicable Standard |
ASTM A269 (also compliant with ASME SA269) |
| Common Grades |
TP304 / 304L, TP316 / 316L, TP321, TP310S |
| Construction Type |
Seamless (SMLS) or Welded & Drawn (W&D) |
| OD Range |
1.6mm – 50.8mm (1/16″ to 2″) |
| Wall Thickness Range |
0.5mm – 5mm (0.020″ to 0.200″) |
| Length |
Up to 6m straight lengths, or custom cut |
| Tolerance |
Standard: ±0.08mm / Precision: ±0.03mm – ±0.05mm |
| Process |
Cold drawn / Cold rolled + Bright annealing |
| Surface Finish |
Bright annealed (internal & external) |
| Delivery Condition |
Annealed – ready for bending and fabrication |
Chemical Composition (Typical, % per ASTM A269)
| Grade |
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Mo |
| TP304 |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.045 |
≤0.030 |
18.0-20.0 |
8.0-11.0 |
– |
| TP304L |
≤0.035 |
≤1.00 |
≤2.00 |
≤0.045 |
≤0.030 |
18.0-20.0 |
8.0-12.0 |
– |
| TP316 |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.045 |
≤0.030 |
16.0-18.0 |
10.0-14.0 |
2.0-3.0 |
| TP316L |
≤0.035 |
≤1.00 |
≤2.00 |
≤0.045 |
≤0.030 |
16.0-18.0 |
10.0-14.0 |
2.0-3.0 |
| TP321 |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.045 |
≤0.030 |
17.0-19.0 |
9.0-12.0 |
– |
ASTM A269 requires lower carbon content in “L" grades for improved weldability and corrosion resistance.
Mechanical Properties (Annealed, per ASTM A269)
| Grade |
Tensile Strength (MPa) |
Yield Strength (MPa) |
Elongation (%) |
Hardness (HRB / HV) |
| TP304 |
≥515 |
≥205 |
≥35 |
≤90 HRB |
| TP304L |
≥485 |
≥170 |
≥35 |
≤90 HRB |
| TP316 |
≥515 |
≥205 |
≥35 |
≤90 HRB |
| TP316L |
≥485 |
≥170 |
≥35 |
≤90 HRB |
| TP321 |
≥515 |
≥205 |
≥35 |
≤90 HRB |
Additional Requirements per ASTM A269
| Test |
Requirement |
| Flattening Test |
No cracks after flattening to specified height |
| Flaring Test |
No cracks after flaring |
| Hydrostatic Test |
Leak-free at specified pressure |
| Eddy Current Test |
NDT – no defects |
Applications
ASTM A269 precision stainless steel pipe is specified for applications requiring cleanliness, corrosion resistance, and dimensional precision:
| Industry |
Typical Uses |
| Instrumentation |
Pressure gauges, temperature sensors, analytical instruments |
| Medical Devices |
Surgical instruments, endoscope tubing, catheters |
| Semiconductor |
High-purity gas lines, wafer handling equipment |
| Food & Beverage |
Hygienic process lines, dairy equipment |
| Pharmaceutical |
Clean steam lines, WFI (water for injection) systems |
| Aerospace |
Hydraulic and fuel lines |
| General Industrial |
Heat exchangers, condensers, chemical processing lines |
Why ASTM A269?
| Advantage |
Benefit |
| Strict chemical limits |
Better corrosion resistance and weldability |
| Annealed condition |
Ready for bending, flaring, and swaging |
| Internal cleanliness |
No contamination in sensitive systems |
| Wide acceptance |
Recognized globally in specification sheets |
| Traceability |
Full mill test reports (MTR) available |
Contact Us
For samples, mill test reports (MTR), technical datasheets, or a custom quote, please contact us.
