Product Overview ASTM A403 WP904L Nipple
ASTM A403 WP904L Nipple is a high-alloy austenitic stainless steel pipe fitting manufactured from 904L (UNS N08904 / EN 1.4539) material. It is designed for joining two threaded or welded pipe connections in highly corrosive environments where exceptional resistance to acids, chlorides, and seawater is required.
WP904L offers outstanding resistance to pitting, crevice corrosion, and chloride stress corrosion cracking due to its high chromium, nickel, molybdenum, and copper content. These nipples are widely used in chemical processing plants, offshore installations, oil & gas pipelines, and sulfuric acid handling systems.
Manufactured as per applicable ASTM standards and supplied with full traceability, WP904L nipples ensure durability, pressure integrity, and long service life.
Key Features
- Excellent resistance to sulfuric & phosphoric acids
- Superior performance in chloride environments
- High strength and durability
- Excellent weldability and machinability
- Low carbon content (≤0.02%) reduces carbide precipitation
- Suitable for high-pressure applications
Available Types
- Hex Nipple
- Barrel Nipple
- Close Nipple
- Threaded Nipple
- Welded Nipple
Available Sizes
| Nominal Size | Length |
|---|---|
| ½” to 12” | Standard & Custom Length |
| Larger Sizes | On Request |
Wall Thickness Options:
SCH 5S, 10S, 20, 40S, 40, 80S, 80, 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 Units
- Offshore & Marine Systems
- Oil & Gas Industry
- Desalination Projects
- Power Generation Plants
- Pharmaceutical Industry
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