Stainless Steel 304L Pipe
304L stainless steel pipe is made from a low-carbon version of 18-8 austenitic stainless steel, the most widely used stainless steel material in the world. Its lower carbon content allows for over-welding without causing localized corrosion. This is because 304L stainless steel pipe produces less carbide precipitation during welding, preventing excessive intergranular corrosion. Stainless steel pipe is available in two types: seamless and welded. Welded pipe is made by joining strips of the same grade end-to-end or spirally welding them.
What's the difference between 304 and 304L pipe?
304 stainless steel pipe: It has higher tensile strength and yield strength, making it more suitable for high-stress applications. 304L stainless steel pipe: While slightly weaker than 304 stainless steel pipe, it's still strong enough for most applications, especially where corrosion resistance is a priority.
Size Chart Of Stainless Steel 304L Seamless Pipe
WT= wall thickness, OD= Outside Diameter, ID= Inside Diameter
| 304L SS Pipes OD mm |
Pipes WT mm |
in. | Sch | Kg/m |
|---|---|---|---|---|
| 13.72 | 1.65 | 1/4 | 10S | 0.50 |
| 13.72 | 2.24 | 1/4 | 40S | 0.64 |
| 13.72 | 3.02 | 1/4 | 80S | 0.81 |
| 17.15 | 1.65 | 3/8 | 10S | 0.64 |
| 17.15 | 2.31 | 3/8 | 40S | 0.86 |
| 17.15 | 3.20 | 3/8 | 80S | 1.12 |
| 21.34 | 2.11 | 1/2 | 10S | 1.02 |
| 21.34 | 2.77 | 1/2 | 40S | 1.29 |
| 21.34 | 3.73 | 1/2 | 80S | 1.65 |
| 26.67 | 2.11 | 3/4 | 10S | 1.30 |
| 26.67 | 2.87 | 3/4 | 40S | 1.71 |
| 26.67 | 3.91 | 3/4 | 80S | 2.23 |
| 33.40 | 2.77 | 1 | 10S | 2.13 |
| 33.40 | 3.38 | 1 | 40S | 2.54 |
| 33.40 | 4.55 | 1 | 80S | 3.29 |
| 33.40 | 6.352) | 1 | 160 | 4.30 |
| 42.16 | 2.77 | 1¼ | 10S | 2.73 |
| 42.16 | 3.56 | 1¼ | 40S | 3.44 |
| 42.16 | 4.85 | 1¼ | 80S | 4.53 |
| 42.16 | 6.352) | 1¼ | 160 | 5.69 |
| 48.26 | 2.77 | 1½ | 10S | 3.16 |
| 48.26 | 3.68 | 1½ | 40S | 4.11 |
| 48.26 | 5.08 | 1½ | 80S | 5.49 |
| 60.33 | 2.77 | 2 | 10S | 3.99 |
| 60.33 | 3.91 | 2 | 40S | 5.52 |
| 60.33 | 5.54 | 2 | 80S | 7.60 |
| 60.33 | 8.742) | 2 | 160 | 11.29 |
| 73.03 | 3.05 | 2½ | 10S | 5.35 |
| 73.03 | 5.16 | 2½ | 40S | 8.77 |
| 73.03 | 7.01 | 2½ | 80S | 11.59 |
Composition Chart of 304L SS Pipe
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
|---|---|---|---|---|---|---|---|---|---|---|
| 304L | min. | – | – | – | – | – | 18.0 | – | 8.0 | – |
| max. | 0.03 | 2.0 | 1.00 | 0.045 | 0.03 | 20.0 | 12.0 | – | ||
304L Pipes Mechanical Properties Chart
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
|---|---|---|---|---|---|
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 304L | 485 | 170 | 40 | 92 | 201 |
304L Tubes Surface Finish
| Surface Finish | Internal Surface(ID) | External Surface(OD) | |||
|---|---|---|---|---|---|
| Roughness Average(RA) | Roughness Average(RA) | ||||
| μ inch | μm | μ inch | μm | ||
| AP | Annealed & Pickled | Not defined | Not defined | 40 or Not defined | 1.0 or Not defined |
| BA | Beight Annealed | 40,32,25,20 | 1.0,0.8,0.6,0.5 | 32 | 0.8 |
| MP | Mechanical Polish | 40,32,25,20 | 1.0,0.8,0.6,0.5 | 32 | 0.8 |
| EP | Electro Polish | 15,10,7,5 | 0.38,0.25,0.20;0.13 | 32 | 0.8 |
Stainless Steel 304L Tube Tolerance
| Stainless Steel 304L Pipe OD | ASTM A312 TP304L Pipe Tolerance |
|---|---|
| 4 to 35mm | +/- 0.08mm |
| 35 to 38mm | +/- 0.15mm |
| 38 to 60mm | +/- 0.20mm |
| 60 and above | +/- 0.25mm |
Gnee Steel specializes in the production and sale of a wide range of stainless steel products, including 304, 316, 321, 904, 904L, 2205 Duplex, 2205 Duplex, and 316L stainless steel. Gnee Steel's products are widely used in the kitchen, aerospace, chemical, power, automotive, and nuclear energy sectors. We also provide custom stainless steel solutions tailored to customer needs. For stainless steel pricing or custom alloy solutions, please email ru@gneesteelgroup.com for a quote.