304 Stainless Aerospace Tubing
304 and 304L are austenitic alloys. These alloys are the most familiar and frequently used alloys in the stainless steel family. The L in 304L refers to a lower carbon content to allow for a greater corrosion protection when welding. Material produced to AMS-T-6845 is suitable for use in high pressure hydraulic systems.
304/304L TUBING TO MIL-T-8504
304 and 304L are austenitic alloys. These alloys are the most familiar and frequently used alloys in the stainless steel family. The L in 304L refers to a lower carbon content to allow for a greater corrosion protection when welding.
304 Stock Size Range:
Tempers: 1/8 hard
Specifications: AMS-T-6845, MIL-T-6845, AMS 5566
| Weight % | Ni | Cr | Mn | C | Si | Mo | S | P | Cu |
|---|---|---|---|---|---|---|---|---|---|
| Minimum | 8.00 | 18.00 | |||||||
| Maximum | 10.50 | 20.00 | 2.00 | .08 | 1.00 | .75 | .03 | .045 | .75 |
| Ultimate | Yield | Elongation % |
|---|---|---|
| KSI | PSI | |
| 105-140 | 75-110 min | 20% |
304/304L Stock Size Range:
OD: .032"- 5"
Tempers: Annealed
Specifications: MILT 8504, AMS-T-8506, AMS 5560, AMS5567
| Weight % | Ni | Cr | Mn | C | Si | Mo | S | P | Cu |
|---|---|---|---|---|---|---|---|---|---|
| Minimum | 8.00 | 18.00 | |||||||
| Maximum | 12.00 | 20.00 | 2.00 | .08 | 1.00 | .50 | .03 | .045 | .75 |
| Nominal OD | Nominal Wall | Ultimate KSI | Yield KSI | Elongation in 2" |
|---|---|---|---|---|
| .187 and less | .016 and less | 115 max | 30 | 30 |
| Over .016 | 75-100 | 30 | 40 | |
| Over .187 | .012 and | 110 max | 30 | 37 |
| To .500 incl | Less | |||
| Over .012 | 75-100 | 30 | 40 | |
| Over .500 | All | 75-100 | 30 | 40 |
ASTM A269 for Stainless Steel Tubing
The ASTM A269 specification as outlined by the American Society for Testing and Materials (ASTM) covers grades of stainless steel that are suitable for various applications involving hydraulics, high-pressure processes, high-temperature processes, and instrumentation systems. More generally, the ASTM A269 specification covers grades of nominal-wall-thickness, corrosion resistance and low- or high-temperature service for these steel products.
As with most specifications ASTM A269 lists the required dimensions, tolerances, mechanical properties, or testing results to remain compliant. In order to verify ASTM A269 compliance, steel must pass a variety of tests including flaring tests, flange tests, hardness tests, and reverse flattening tests.
ASTM A269 Applications
It is always important to refer to the specific ASTM A269 standard document for comprehensive details and the exact requirements for stainless steel intended for your application. TW Metals stocks and ships a variety of ASTM A269 steel products for nearly any industry including but not limited to:
- Chemical Processing
- Petrochemicals/Oil & Gas
- Food Processing
- Pharmaceuticals
- Extraction
- And more…
