SS 304L Stainless Steel
Low-carbon version of 304. Resists intergranular corrosion after welding, so it is preferred for welded tanks and thick sections.
Last updated:
What is SS 304L?
SS 304L (UNS S30403, EN 1.4307) is an austenitic stainless steel containing 17.5–19.5% chromium and 8.0–12.0% nickel. Low-carbon version of 304. Resists intergranular corrosion after welding, so it is preferred for welded tanks and thick sections. It is non-magnetic in the annealed condition, has a density of 7.93 g/cm³ and a minimum tensile strength of 485 MPa, and is used mainly for welded storage tanks, pharma and chemical process vessels and piping systems.
- Type Austenitic (300 series)
- Equivalents UNS S30403 · EN 1.4307 · SUS 304L
- Density 7.93 g/cm³
- Strength (min) 485 MPa tensile · 170 MPa yield
- Magnetic? Non-magnetic in the annealed condition
- Main uses Welded storage tanks, pharma and chemical process vessels, piping systems
What is the chemical composition of SS 304L?
Typical ASTM A240 limits, % by weight (single values are maximums).
| C | Mn | Si | P | S | Cr | Ni | N |
|---|---|---|---|---|---|---|---|
| 0.030 max | 2.00 max | 0.75 max | 0.045 max | 0.030 max | 17.5 – 19.5 | 8.0 – 12.0 | 0.10 max |
What are the mechanical properties of SS 304L?
| Tensile strength (min) | 485 MPa |
|---|---|
| Yield strength 0.2% (min) | 170 MPa |
| Elongation (min) | 40% |
| Hardness (max) | 92 HRB / 201 HB max |
| Density | 7.93 g/cm³ |
What is the equivalent of SS 304L?
| ASTM / AISI | UNS | EN / W.Nr. | DIN | JIS |
|---|---|---|---|---|
| 304L | S30403 | 1.4307 | X2CrNi18-9 | SUS 304L |
Where is SS 304L used?
- Welded storage tanks
- Pharma and chemical process vessels
- Piping systems
- Heavy-gauge welded fabrication
Can SS 304L be welded?
Excellent, and the preferred choice for welded tanks and thick sections because the low carbon prevents chromium carbides forming at the weld. Use ER308L filler.
Forming and machining
Forms and machines like 304; slightly lower strength makes it marginally easier to bend.
SS 304L sizes we supply
Usually supplied as dual-certified 304/304L sheets, plates, pipes and bars, in the same sizes as 304.
SS 304L price compared with 304
About the same as 304 — most mills supply dual-certified 304/304L at little or no premium. For today's rate, send us your size and quantity.
Our advice
Most mills now supply dual-certified 304/304L material, which meets the strength of 304 and the carbon limit of 304L.
Values are typical ASTM A240 limits for flat products and are for guidance only. Always refer to the mill test certificate supplied with the material.
SS 304L — FAQs
What is the chemical composition of SS 304L?
SS 304L contains up to 0.030% carbon, up to 2.00% manganese, up to 0.75% silicon, up to 0.045% phosphorus, up to 0.030% sulphur, 17.5–19.5% chromium, 8.0–12.0% nickel and up to 0.10% nitrogen, with the balance iron (typical ASTM A240 limits).
What is the equivalent of SS 304L?
SS 304L is UNS S30403, EN 1.4307 (X2CrNi18-9) and SUS 304L in the Japanese standard.
What is the density of SS 304L?
The density of SS 304L is about 7.93 g/cm³ (7930 kg/m³).
Where can I buy SS 304L in Vadodara?
Sagar Sales Corporation supplies SS 304L sheet, plate, coil, round bar, pipe, tube, angle & flat, flanges, shims, slit coil in Vadodara with mill test certificates. Contact us for today's rate.
Get today's SS 304L rate
Tell us the grade, size, finish and quantity. We check stock and send a per-kg rate with dispatch date — usually the same working day.
- Rates direct from Vadodara stock
- Mill test certificate with every lot
- Cut-to-size and delivery all over India