304 / 304L Stainless Steel Pipe
Stellanox Steel is a reliable producer and supplier of premium 304 and 304L stainless steel pipes, which are renowned for their exceptional durability, formability, and resistance to corrosion. Numerous sectors, including construction, chemical processing, water treatment, and food-grade systems, use these pipes extensively. When it comes to fluid conveyance, pressure systems, or structural applications, 304/304L stainless pipes offer durability and affordability.
What is 304 / 304L Stainless Steel Pipe?
The austenitic alloy 304 stainless steel pipe, which is mostly made up of 18% chromium and 8% nickel, provides exceptional resistance to corrosion and oxidation in a variety of settings. The low-carbon version of 304, known as 304L, is specifically made to reduce carbide precipitation when welding.
Both 304 and 304L pipes have exceptional mechanical strength, are highly weldable, and are non-magnetic when annealed. These pipes are widely utilised for structural elements that need to be resistant to heat, chemicals, and moisture as well as for the transportation of gases and fluids.
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Stainless Steel |
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Carbon Steel |
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Duplex Stainless Steel |
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Super Duplex Stainless Steel |
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Alloy Steel |
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Titanium |
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Hastelloy |
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Inconel |
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Monel |
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Aluminium |
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Copper |
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Pure Nickel |
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Flanges |
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Forged Fittings |
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Valves |
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Fasteners |
Key Features of 304 / 304L Stainless Steel Pipe
- Outstanding Corrosion Resistance: Functions well in conditions that are moderately acidic, chemical, and atmospheric.
- Superior weldability and resistance to intergranular corrosion are features of the low carbon variant (304L).
- Good mechanical strength makes it appropriate for load-bearing and structural applications.
- Versatile Uses: In fabrication, pressure systems, piping, and decorative design.
Food-grade and hygienic: suitable for use in potable water systems and food processing. - Annealed Non-Magnetic: Perfect for devices that need non-magnetic components.
- Available in Welded and Seamless Types: To satisfy performance and cost needs.
Specification Chart – 304 / 304L Stainless Steel Pipe
| Property | Details |
|---|---|
| Grades | 304 / 304L (UNS S30400 / S30403) |
| Standards | ASTM A312, A358, A778, ASME SA312 |
| Sizes | 1/8" NB to 24" NB (DN6 to DN600) |
| Wall Thickness | SCH 5 to SCH 160 / XXS |
| Length | Single/Double Random (6m / 12m), Cut-to-length |
| Pipe Types | Seamless, Welded, ERW, EFW |
| Ends | Plain End (PE), Beveled End (BE), Threaded End (TE) |
| Finish | Annealed, Pickled, Polished, Bright Annealed |
| Surface Protection | Plastic Capped, PVC-Wrapped, Paper Interleaf |
Chemical Composition – 304 vs. 304L Stainless Steel Pipe
| Element | 304 (%) | 304L (%) |
|---|---|---|
| Chromium | 18.0 – 20.0 | 18.0 – 20.0 |
| Nickel | 8.0 – 10.5 | 8.0 – 12.0 |
| Carbon | ≤ 0.08 | ≤ 0.03 |
| Manganese | ≤ 2.0 | ≤ 2.0 |
| Silicon | ≤ 0.75 | ≤ 0.75 |
| Phosphorus | ≤ 0.045 | ≤ 0.045 |
| Sulfur | ≤ 0.030 | ≤ 0.030 |
| Iron | Balance | Balance |
Mechanical Properties – 304 / 304L Stainless Steel Pipe
| Property | 304 | 304L |
|---|---|---|
| Tensile Strength (MPa) | ≥ 515 | ≥ 485 |
| Yield Strength (MPa) | ≥ 205 | ≥ 170 |
| Elongation (%) | ≥ 40 | ≥ 40 |
| Hardness (HRB) | ≤ 90 | ≤ 90 |
| Modulus of Elasticity | 193 GPa | 193 GPa |
| Density | 8.00 g/cm³ | 8.00 g/cm³ |
Equivalent Grades
| Standard | 304 | 304L |
|---|---|---|
| ASTM | 304 | 304L |
| EN | 1.4301 | 1.4307 |
| JIS | SUS 304 | SUS 304L |
| UNS | S30400 | S30403 |
| DIN | X5CrNi18-10 | X2CrNi18-9 |
304 / 304L Stainless Steel Pipe Weight Chart
| OD (mm) | Wall Thickness (mm) | Weight per Meter (kg) | Weight per 6m Length (kg) |
|---|---|---|---|
| 21.3 | 2.77 | 1.26 | 7.56 |
| 33.4 | 3.38 | 2.61 | 15.66 |
| 42.2 | 3.56 | 3.64 | 21.84 |
| 48.3 | 3.68 | 4.46 | 26.76 |
| 60.3 | 3.91 | 6.17 | 37.02 |
| 73.0 | 5.16 | 10.14 | 60.84 |
| 88.9 | 5.49 | 13.10 | 78.60 |
| 114.3 | 6.02 | 20.40 | 122.40 |
Applications of 304 / 304L Stainless Steel Pipe
- Water and sewage piping systems
- Food and beverage transport systems
- Heat exchangers and pressure piping
- HVAC ducting and vent lines
- Structural piping in marine and architectural works
- Dairy and brewing pipelines
- Petrochemical and refinery flow lines
Benefits of 304 / 304L Stainless Steel Pipe
- High corrosion resistance in atmospheric and aqueous environments
- Smooth inner bore ensures optimal fluid flow
- Excellent strength-to-weight ratio
- Easy to cut, machine, bend, and weld
- Long life span with minimal maintenance
- Fully recyclable and sustainable material choice
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