Product Overview
ASTM A403 WP904L Tee is a high-alloy austenitic stainless steel butt-weld pipe fitting manufactured from 904L (UNS N08904 / EN 1.4539) material. It is designed for severe corrosive environments where conventional stainless steel grades such as 316L are not suitable.
WP904L Tee offers outstanding resistance to pitting, crevice corrosion, chloride stress corrosion cracking, and strong acids including sulfuric, phosphoric, and nitric acids. These tees are widely used in chemical processing plants, offshore platforms, oil & gas pipelines, and desalination systems.
Manufactured as per ASTM A403 and dimensional standards ASME B16.9, WP904L tees ensure high strength, long service life, and reliable performance in critical piping systems.
Key Features
- Excellent resistance to sulfuric & phosphoric acid
- Superior resistance to chloride environments
- High strength and durability
- Excellent weldability
- Low carbon content (≤0.02%) prevents carbide precipitation
- Suitable for high-pressure & high-temperature applications
Available Types
- Equal Tee
- Reducing Tee
- Fabricated Tee (Large Size)
Available Sizes
| Nominal Pipe Size (NPS) | Schedule |
|---|---|
| ½” to 24” | SCH 5S to SCH XXS |
| Up to 48” | On Request |
Wall Thickness: SCH 5S, 10S, 20, 40S, 40, 60, 80S, 80, 120, 160, XXS
ASTM A403 WP904L Chemical Composition (%)
| Element | Content |
|---|---|
| Chromium (Cr) | 19.0 – 23.0 |
| Nickel (Ni) | 23.0 – 28.0 |
| Molybdenum (Mo) | 4.0 – 5.0 |
| Copper (Cu) | 1.0 – 2.0 |
| Carbon (C) | ≤ 0.02 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
ASTM A403 WP904L Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 490 MPa |
| Yield Strength | ≥ 220 MPa |
| Elongation | ≥ 35% |
| Hardness | ≤ 90 HRB |
Applications
- Chemical & Petrochemical Plants
- Acid Processing Units
- Offshore & Marine Systems
- Oil & Gas Refineries
- Desalination Plants
- Heat Exchangers
- Pharmaceutical & Fertilizer Industry
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