Product Overview
ASTM A403 WP904L Reducers are high-alloy austenitic stainless steel butt-weld fittings manufactured from 904L (UNS N08904 / EN 1.4539) material. These reducers are designed for use in highly corrosive environments where superior resistance to acids, chlorides, and seawater is required.
WP904L contains high levels of Chromium, Nickel, Molybdenum, and Copper, making it highly resistant to pitting, crevice corrosion, and chloride stress corrosion cracking. These reducers are ideal for chemical processing, offshore platforms, oil & gas, and sulfuric acid plants.
Manufactured in accordance with ASTM A403 and ASME B16.9, WP904L reducers ensure smooth flow transition, pressure integrity, and long service life.
Key Features
- Excellent resistance to sulfuric, phosphoric & nitric acids
- Superior performance in chloride environments
- High resistance to pitting & crevice corrosion
- Excellent weldability
- Low carbon content (≤0.02%) reduces carbide precipitation
- Suitable for high-pressure piping systems
Available Types
- Concentric Reducer
- Eccentric Reducer
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 Plants
- Offshore & Marine Systems
- Oil & Gas Refineries
- Desalination Projects
- Heat Exchangers
- Power Generation Plants
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