Grade: 304 / 304L
UNS: S30400 / S30403
EN: 1.4301 / 1.4307
Chemical Composition (%)
| Element | SS 304 | SS 304L |
|---|---|---|
| Carbon (C) | 0.08 max | 0.03 max |
| Manganese (Mn) | 2.00 max | 2.00 max |
| Phosphorus (P) | 0.045 max | 0.045 max |
| Sulphur (S) | 0.030 max | 0.030 max |
| Nickel (Ni) | 8.0 – 10.5 | 8.0 – 12.0 |
| Chromium (Cr) | 18.0 – 20.0 | 18.0 – 20.0 |
| Nitrogen (N) | 0.10 max | 0.10 max |
| Iron (Fe) | Balance | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 35 % |
| Hardness | ≤ 90 HRB |
Equivalent Grades
AISI 304 / 304L
ASTM TP 304 / 304L
UNS S30400 / S30403
DIN EN 1.4301 / 1.4307
SUS 304 / 304L
Types Available
Elbow (45°, 90°)
Tee (Equal / Reducing)
Reducer (Concentric / Eccentric)
Stub End
End Cap
Key Features
High mechanical strength
Smooth internal surface for better flow
Excellent corrosion and oxidation resistance
Leak-proof welded joints
Long service life with low maintenance
Manufacturing Standards
ASTM A403
ASME SA 403
ASME B16.9 / B16.28
EN 10253
Surface Finish
Pickled & Passivated
Mill Finish
Polished Finish (as required)
Applications
Oil & gas pipelines
Chemical & petrochemical industries
Power plants & refineries
Water treatment plants
Food processing & pharmaceutical industries
Shipbuilding & offshore applications