304 / 304L Stainless Steel Seamless Tubing
Product Introduction
Alloys 304 (S30400) and 304L (S30403) stainless steels are variations of the 18 percent chromium – 8 percent nickel austenitic alloy, the most familiar and most frequently used alloy in the stainless steel family. 304/L stainless steel has excellent fabrication properties. Its malleability allows it to be easily formed for flaring, bending and coiling. Good machinability and the low sulfur content promotes excellent weldability in applications requiring it.
High strength, excellent corrosion resistance and minimized carbon content make Alloy 304 and 304L Stainless Steels useful for applications where welding is required. Uses include architectural mouldings and trim, welded components of chemical, textile, paper, pharmaceutical and chemical industry processing equipment.
Other advantages are its resistance to oxidation, excellent formability, ease of fabrication and cleaning, excellent strength to weight ratio and good toughness at cryogenic temperatures For severely corrosive environments, the lower content of Type 304L is preferred because of its greater immunity to intergranular corrosion.
Type 304L stainless steel is an extra-low carbon version of the 304 steel alloy. The lower carbon content in 304L minimizes deleterious or harmful carbide precipitation as a result of welding. 304L can, therefore, be used "as welded" in severe corrosion environments, and it eliminates the need for annealing.
This grade has slightly lower mechanical properties than the standard 304 grade, but is still widely used thanks to its versatility. Like Type 304 stainless steel, it's commonly used in beer-brewing and wine-making, but also for purposes beyond the food industry such as in chemical containers, mining, and construction. It is ideal for use in metal parts such as nuts and bolts that are exposed to salt water.
Product Specifications
ASTM A269, ASTM A213 / ASME SA213 (Seamless)
Comparison of Chemacal Composition
| Code | Standard | CHEMICAL COMPOSITION | |||||||||
| C | Si | Mn | P | S | Ni | Cr | Mo | OTHER | |||
| 304 | JIS | SUS 304 | 0.080 max | 1.00 max | 2.00 max | 0.040 max | 0.030 max | 8.00-11.00 | 18.00-20.00 | - | - |
| AISI | 304 | 0.080 max | 1.00 max | 2.00 max | 0.045 max | 0.030 max | 8.00-10.50 | 18,00-20.00 | - | - | |
| ASTM | TP 304 | 0.080 max | 0.75 max | 2.00 max | 0.040 max | 0.030 max | 8.00-11.00 | 18.00-20.00 | - | - | |
| DIN | X5CrNi189 Nr,1,4301 |
0.070 max | 1.00 max | 2.00 max | 0.045 max | 0.030 max | 8,50-10.00 | 17.00-20.00 | * | - | |
| 304L | JIS | SUS 304L | 0.030 max | 1.00 max | 2.00 max | 0.040 max | 0.030 max | 9,00-13.00 | 18.00-20.00 | - | - |
| AISI | 304L | 0.030 max | 1.00 max | 2.00 max | 0.045 max | 0.030 max | 8.00-12.00 | 18.00-20.00 | - | - | |
| ASTM | TP 304L | 0.035 max | 0.75 max | 2.00 max | 0.040 max | 0.030 max | 8,00-13.00 | 18.00-20.00 | - | - | |
| DIN | X2CrNi189 Nr.1,4306 |
0.030 max | 1.00 max | 2.00 max | 0.045 max | 0.030 max | 10.00-12.50 | 17.00-20.00 | * | - | |
| Mechanical Properties | |
| Yield Strength | 30 Ksi min |
| Tensile Strength | 75 Ksi min |
| Elongation(2" min) | 35% |
| Hardness(Rockwell B Scale) | 90 HRB max |
Size Tolerance
| O.D | O.D Toleracne | W.T Tolerance |
| Inch | mm | % |
| 1/8" | +0.08/-0 | +/-10 |
| 1/4" | +/-0.10 | +/-10 |
| Up to 1/2" | +/-0.13 | +/-15 |
| 1/2" to 1-1/2" , excl | +/-0.13 | +/-10 |
| 1-1/2" to 3-1/2" , excl | +/-0.25 | +/-10 |
| Note: The tolerance can be negotiated according to the customer's specific requirements | ||
| Maximum allowable pressure(unit: BAR) | ||||||||
| Wall Thickness(mm) | ||||||||
| 0.89 | 1.24 | 1.65 | 2.11 | 2.77 | 3.96 | 4.78 | ||
| O.D(mm) | 6.35 | 387 | 562 | 770 | 995 | |||
| 9.53 | 249 | 356 | 491 | 646 | 868 | |||
| 12.7 | 183 | 261 | 356 | 468 | 636 | |||
| 19.05 | 170 | 229 | 299 | 403 | ||||
| 25.4 | 126 | 169 | 219 | 294 | 436 | 540 | ||
| 31.8 | 134 | 173 | 231 | 340 | 418 | |||
| 38.1 | 111 | 143 | 190 | 279 | 342 | |||
| 50.8 | 83 | 106 | 141 | 205 | 251 | |||
Certificate Of Honor
ISO9001/2015 Standard
ISO 45001/2018 Standard
PED Certificate
TUV Hydrogen compatibility test certificate
| No. | Size(mm) | |
| O.D | Thk | |
| BA Tube Inner surface roughness Ra0.35 | ||
| 1/4″ | 6.35 | 0.89 |
| 6.35 | 1.00 | |
| 3/8″ | 9.53 | 0.89 |
| 9.53 | 1.00 | |
| 1/2” | 12.70 | 0.89 |
| 12.70 | 1.00 | |
| 12.70 | 1.24 | |
| 3/4” | 19.05 | 1.65 |
| 1 | 25.40 | 1.65 |
| BA Tube Inner surface roughness Ra0.6 | ||
| 1/8″ | 3.175 | 0.71 |
| 1/4″ | 6.35 | 0.89 |
| 3/8″ | 9.53 | 0.89 |
| 9.53 | 1.00 | |
| 9.53 | 1.24 | |
| 9.53 | 1.65 | |
| 9.53 | 2.11 | |
| 9.53 | 3.18 | |
| 1/2″ | 12.70 | 0.89 |
| 12.70 | 1.00 | |
| 12.70 | 1.24 | |
| 12.70 | 1.65 | |
| 12.70 | 2.11 | |
| 5/8″ | 15.88 | 1.24 |
| 15.88 | 1.65 | |
| 3/4″ | 19.05 | 1.24 |
| 19.05 | 1.65 | |
| 19.05 | 2.11 | |
| 1″ | 25.40 | 1.24 |
| 25.40 | 1.65 | |
| 25.40 | 2.11 | |
| 1-1/4″ | 31.75 | 1.65 |
| 1-1/2″ | 38.10 | 1.65 |
| 2″ | 50.80 | 1.65 |
| 10A | 17.30 | 1.20 |
| 15A | 21.70 | 1.65 |
| 20A | 27.20 | 1.65 |
| 25A | 34.00 | 1.65 |
| 32A | 42.70 | 1.65 |
| 40A | 48.60 | 1.65 |
| 50A | 60.50 | 1.65 |
| 8.00 | 1.00 | |
| 8.00 | 1.50 | |
| 10.00 | 1.00 | |
| 10.00 | 1.50 | |
| 10.00 | 2.00 | |
| 12.00 | 1.00 | |
| 12.00 | 1.50 | |
| 12.00 | 2.00 | |
| 14.00 | 1.00 | |
| 14.00 | 1.50 | |
| 14.00 | 2.00 | |
| 15.00 | 1.00 | |
| 15.00 | 1.50 | |
| 15.00 | 2.00 | |
| 16.00 | 1.00 | |
| 16.00 | 1.50 | |
| 16.00 | 2.00 | |
| 18.00 | 1.00 | |
| 18.00 | 1.50 | |
| 18.00 | 2.00 | |
| 19.00 | 1.50 | |
| 19.00 | 2.00 | |
| 20.00 | 1.50 | |
| 20.00 | 2.00 | |
| 22.00 | 1.50 | |
| 22.00 | 2.00 | |
| 25.00 | 2.00 | |
| 28.00 | 1.50 | |
| BA Tube, No request about the inner surface roughness | ||
| 1/4″ | 6.35 | 0.89 |
| 6.35 | 1.24 | |
| 6.35 | 1.65 | |
| 3/8″ | 9.53 | 0.89 |
| 9.53 | 1.24 | |
| 9.53 | 1.65 | |
| 9.53 | 2.11 | |
| 1/2″ | 12.70 | 0.89 |
| 12.70 | 1.24 | |
| 12.70 | 1.65 | |
| 12.70 | 2.11 | |
| 6.00 | 1.00 | |
| 8.00 | 1.00 | |
| 10.00 | 1.00 | |
| 12.00 | 1.00 | |
| 12.00 | 1.50 | |
