A403 WP304 / WP304L Stainless Manufacturer & Supplier
Austenitic stainless butt weld fittings for corrosive, hygienic and moderately high temperature service. The L grade caps carbon at 0.035% so the heat affected zone does not sensitise during welding — the reason it dominates welded assemblies.
UNS: ASTM A403 WP304 / WP304L | Category: Stainless Steel Fittings
Size Range
Outer Diameter: NPS 1/2 to 48 · SCH 5S to SCH 80S and heavier to order
Chemical Composition (%)
| Cr | Ni | C | Mn |
|---|---|---|---|
| 18.0-20.0 | 8.0-11.0 | 0.08 max (0.035 max for L) | 2.00 max |
Mechanical Properties
- Tensile Strength
- 515 MPa min
- Yield Strength
- 205 MPa min
- Elongation
- 35% min
- Hardness
- 192 HBW max
Applicable Standards
- ASME B16.9
- MSS SP-43
- ASTM A403
- ASME B31.3
- EN 10204 3.1
Applications
- Chemical and pharmaceutical process lines
- Food, dairy and beverage piping
- Water treatment and RO skids
- Utility and instrument air lines
- Architectural and handrail work
Industries Served
- Oil & Gas
- Chemical & Petrochemical
- Power & Energy
- Fertiliser
- Water & Desalination
- Pharmaceutical
Equivalent Grades
- ASTM A403 WP304
- ASTM A403 WP304
- A403 WP304L
- A403 WP304L
- 1.4301
- 1.4301
- 1.4307
- 1.4307
- SUS304
- SUS304