Product Overview ASTM A403 WP904L Cross
ASTM A403 WP904L Cross Fittings are high-alloy austenitic stainless steel butt-weld fittings manufactured from 904L (UNS N08904 / EN 1.4539) material. These fittings are designed to connect four pipe sections at right angles, allowing smooth distribution or collection of flow in highly corrosive piping systems.
WP904L offers exceptional resistance to pitting, crevice corrosion, and chloride stress corrosion cracking due to its high chromium, nickel, molybdenum, and copper content. These cross fittings are widely used in acid handling systems, offshore installations, oil & gas processing, and chemical industries.
Manufactured in accordance with ASTM A403 and ASME B16.9, WP904L cross fittings ensure strength, dimensional accuracy, and long-term durability in aggressive service conditions.
Key Features
- Excellent resistance to sulfuric, phosphoric & nitric acids
- Superior resistance to chloride environments
- High strength with excellent ductility
- Outstanding weldability
- Low carbon content (≤0.02%) minimizes carbide precipitation
- Suitable for high-pressure and high-temperature applications
Available Types
- Equal Cross
- Reducing Cross
- Fabricated Cross (Large Diameter)
Available Sizes
| Nominal Pipe Size (NPS) | Schedule |
|---|---|
| ½” to 24” | SCH 5S to SCH XXS |
| Up to 48” | On Request |
Wall Thickness Options:
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
- Sulfuric Acid Processing
- Offshore & Marine Systems
- Oil & Gas Refineries
- Desalination Projects
- Fertilizer & Pharmaceutical Industry
- Power Generation Plants
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