Overview
304 Stainless Steel pipe is a cost-effective pipe used for both structural and pressure applications due to its good machinability properties as well as excellent weld-ability characteristics with or without the addition of filler metals. These 304 grades of austenitic stainless steels are the most versatile and widely used stainless steels offers excellent corrosion resistance to a wide range of corrosive environments.
ASTM A312 TP304L has a carbon content of 0.03% or less. This alloy can be used in the as-welded condition without becoming susceptible to intergranular corrosion. ASTM A312 TP304L Stainless Steel Seamless Pipe are tested in accordance to internationally recognized standards. ASTM A312 Stainless Steel 304L Seamless Pipe shall be made by a process that does not involved welding at any stage of production. It has excellent features like resistance to corrosion, Prevention of product contamination, Resistance to oxidation, East of fabrication, Excellent formability, Beauty of appearance, Ease of cleaning, High strength with low weight, Good strength and toughness at cryogenic temperatures and Ready availability of a wide range of product forms.
Specification
ASTM A312/A312M-21 Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| SS 304 | 1.4301 | S30400 | SUS 304 | 304S31 | 08Х18Н10 | Z7CN18-09 | X5CrNi18-10 |
| SS 304L | 1.4306 / 1.4307 | S30403 | SUS 304L | 3304S11 | 03Х18Н11 | Z3CN18-10 | X2CrNi18-9 / X2CrNi19-11 |
Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| SS 304 | 0.08 max | 2 max | 0.75 max | 0.045 max | 0.030 max | 18-20 | - | 8-11 | - |
| SS 304L | 0.035 max | 2 max | 1.0 max | 0.045 max | 0.03 max | 18-20 | - | 8-13 | - |
Mechanical Properties
Material | Heat Treatment | Temperure Min.ºF(ºC) | Tensile Strength Ksi (MPa), Min. | Yield Strength Ksi (MPa), Min. | Elongation %, Min |
| TP304 | Solution | 1900 (1040) | 75(515) | 30(205) | 35 |
| TP304L | Solution | 1900 (1040) | 70(485) | 25(170) | 35 |
Applications
- 1. Food processing equipment, particularly in beer brewing, milk processing & wine making.
- 2. Kitchen benches, sinks, troughs, equipment and appliances.
- 3. Architectural panelling, railings & trim.
- 4. Chemical containers, including for transport.
- 5. Heat Exchangers.
- 6. Woven or welded screens for mining, quarrying & water filtration
- 7. Threaded fasteners.
- 8. Springs.
- 9. Ship building, onshore , offshore, Maire.
