SS Pipe Fittings A403 304L Supplier, ASTM A403 WP304L Stainless Steel Fittings, Reliable Pipes & Tubes.
Reliable Pipes & Tubes is a leading supplier, stockholder, and exporter of high-grade SS Pipe Fittings A403 304L. SS Pipe Fittings A403 304L refers to ASTM A403 standard covering wrought austenitic stainless steel piping fittings for pressure service in the WP304L low-carbon grade. The low carbon content in SS Pipe Fittings A403 304L (maximum 0.035% carbon) makes them ideal for applications where sensitization must be avoided, especially in welded assemblies.
The SS Pipe Fittings A403 304L are designed for forged steel pipe fittings and can be used in many critical engineering fields including chemical processing, energy conversion plants, food and beverage, pharmaceutical, and other corrosive environments. Material under ASTM A403 is named as WP Grade, and for each WP grade stainless steel, several categories of pipe fittings are included to indicate that a seamless or welded structure is used.
We offer a comprehensive range of SS Pipe Fittings A403 304L from 1/2" NB to 48" NB in various schedules to meet custom applications. Every SS Pipe Fittings A403 304L supplied by Reliable Pipes & Tubes undergoes rigorous testing including tensile testing, chemical analysis, and visual inspection to ensure optimal quality and structural integrity.
Email us Whatsapp us Call usSS Pipe Fittings A403 304L refers to ASTM A403 standard for wrought austenitic stainless steel piping fittings, specifically the WP304L low-carbon variant. The SS Pipe Fittings A403 304L are specifically designed for forged steel pipe fittings; cast pipe fittings are not suitable under this standard. The key advantage of SS Pipe Fittings A403 304L over the standard 304 grade is the reduced carbon content (max 0.035% vs 0.08%), which significantly reduces the risk of carbide precipitation during welding and improves corrosion resistance after heat exposure. All SS Pipe Fittings A403 304L should be supplied in heat treated condition and all welding work should be done before heat treatment.
| Parameter | Details |
|---|---|
| Company Name | Reliable Pipes & Tubes |
| Country/Region | India |
| FOB Price | US $1500 - $5500 / Metric Ton |
| Port | Nhava Sheva Port, Mumbai |
| Main Products | Pipe Fittings, Elbows, Tees, Reducers, Caps, Flanges |
| Certification | ISO 9001, ISO 14001 & OHSAS 18001 |
| Specification Heading | Details |
|---|---|
| Specification | ASTM A403 / ASME SA403 |
| Grade | WP304L |
| UNS Number | S30403 |
| DIN / EN | 1.4306 / 1.4307 |
| Types | Seamless or Welded |
| Dimension Range | 1/2" NB to 48" NB |
| Wall Thickness Range | Schedule 10S, Schedule 40S, Schedule 80S |
| Dimension Standards | ASME B16.9, ASME B16.11, MSS SP-43, MSS SP-79, MSS SP-95, MSS SP-97 |
| Fitting Types | Elbow, Tee, Cap, Reducer, Coupling, Nipple, Bend, Olets |
| Surface Finish | Pickled, Annealed & Pickled, Bright Annealed, Passivated |
| Ends | Plain Ends, Beveled Ends, Threaded Ends |
| Packaging | Wooden Pallet / Wooden Box / Plastic Cloth Wraps / Plastic End Caps |
| Material Test Certificate | EN10204 3.1, 3.2 / Laboratory Test Certificate from NABL Approved Lab. / Under Third Party Inspection Agency like SGS, TUV, DNV, LLOYDS, ABS etc. |
| Equivalent Standards | GOST, AWWA, BS, SS, KS, AISI, JIS, GB, IS, ISO, SAE, DIN, NFA, API, ASTM, CSA, ANSI, EN, UNI |
| Standard | Description |
|---|---|
| ASTM A351/A351M | Casting, Austenitic, for Pressure-Containing Parts Specifications |
| ASTM A743/A743M | Specifications of Casting, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant for General Application |
| ASTM A744/A744M | For Server Service other than A743M |
| ASTM A751 | Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products |
| ASTM A960/A960M | Specifications for Common Requirements of Wrought Steel Pipe Fittings |
| ASTM E112 | Test Methods for Determining Average Grain Size |
| ASTM E165 | Practice for Liquid Penetrant Examination for General Industry |
| ASME B16.9 | Factory-Made Wrought Steel Butt Weld Fittings |
| ASME B16.11 | Forged Steel Fittings, Socket Weld and Threaded |
| MSS SP-25 | Standard Marking System for Valves, Fittings, Flanges, and Unions |
| MSS SP-43 | Standard Practice for Light Weight Stainless Steel Butt Weld Fittings |
| MSS SP-79 | Socket Weld Reducer Inserts |
| MSS SP-95 | Swaged Nipples and Bull Plugs |
| MSS SP-97 | Integrally Reinforced Forged Branch Outlet Fittings of Socket Weld, Threaded |
| AWS A5.4, A5.9, A5.11, A5.14 | Welding Consumables Standards |
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | - | 0.035 |
| Manganese (Mn) | - | 2.0 |
| Silicon (Si) | - | 0.75 |
| Phosphorus (P) | - | 0.045 |
| Sulfur (S) | - | 0.03 |
| Chromium (Cr) | 18.0 | 20.0 |
| Nickel (Ni) | 8.0 | 12.0 |
| Nitrogen (N) | - | 0.10 |
* The key characteristic of SS Pipe Fittings A403 304L is the low carbon content (max 0.035%) vs. 304 (max 0.08%), which minimizes carbide precipitation during welding.
| Property | Value |
|---|---|
| Tensile Strength, min | 485 MPa (70 ksi) |
| Yield Strength 0.2% Proof, min | 170 MPa (25 ksi) |
| Elongation (Longitudinal), min % | 35% |
| Elongation (Transverse), min % | 25% |
| Hardness Brinell (HB), max | 201 |
| Density | 7.93 g/cm3 |
| Melting Point | 1399 – 1454 °C |
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | AFNOR | EN |
|---|---|---|---|---|---|---|
| WP304L | 1.4306 / 1.4307 | S30403 | SUS 304L | 304S11 | Z3CN18-10 | X2CrNi18-9 / X2CrNi19-11 |
* Note: These comparisons are approximate only. If exact equivalents are needed original specifications must be consulted.
| Fitting Type | Description |
|---|---|
| Elbow | SS Pipe Fittings A403 304L – 45°, 90°, 180° elbows for directional change in piping systems |
| Tee | SS Pipe Fittings A403 304L – Equal and reducing tees for branch connections |
| Cap | SS Pipe Fittings A403 304L – End caps to close pipe ends |
| Reducer | SS Pipe Fittings A403 304L – Concentric and eccentric reducers for pipe size transitions |
| Coupling | SS Pipe Fittings A403 304L – Couplings for joining pipes of same diameter |
| Nipple | SS Pipe Fittings A403 304L – Short pipe lengths for connecting fittings |
| Bend | SS Pipe Fittings A403 304L – Long radius and short radius bends |
| Olets | SS Pipe Fittings A403 304L – Weldolets, sockolets, threadolets for branch connections |
The ASTM A403 standard for SS Pipe Fittings A403 304L includes several grades of austenitic stainless steel alloys, and uses the WP or CR prefix to mark the grade of steel. Steel for SS Pipe Fittings A403 304L should be smelted using one of the following methods:
The forming or forging operation for SS Pipe Fittings A403 304L may be performed by hammer forging, press forging, perforating, extrusion, upsetting, rolling, bending, welding or machining, or two or more methods at the same time. All SS Pipe Fittings A403 304L should be supplied in heat treated condition and all welding work should be done before heat treatment.
| Test Type | Details |
|---|---|
| Tensile Test | Longitudinal or transverse cut specimens; properties shall comply with tensile requirements per A370 methods |
| Chemical Analysis | Each cast or furnace steel chemical composition shall be determined and comply with WP304L requirements |
| Visual Inspection | All SS Pipe Fittings A403 304L shall be visually inspected for surface discontinuities |
| Liquid Penetrant Test | As per ASTM E165 Practice for Liquid Penetrant Examination for General Industry |
| Grain Size Test | As per ASTM E112 Test Methods for Determining Average Grain Size |
| PMI Testing | Positive Material Identification for SS Pipe Fittings A403 304L |
| Hydrostatic Test | As required per applicable standards |
| Hardness Test | Rockwell and Brinell hardness testing as required |
| Product Description | Price (FOB) |
|---|---|
| SS Pipe Fittings A403 304L – Elbow | US $2.00 - 18.00 / Piece |
| SS Pipe Fittings A403 304L – Tee | US $3.00 - 22.00 / Piece |
| SS Pipe Fittings A403 304L – Reducer | US $2.50 - 20.00 / Piece |
| SS Pipe Fittings A403 304L – Cap | US $1.50 - 12.00 / Piece |
| SS Pipe Fittings A403 304L – Coupling | US $1.00 - 9.00 / Piece |
| SS Pipe Fittings A403 304L – Bend | US $5.00 - 55.00 / Piece |
| SS Pipe Fittings A403 304L – Per Ton | US $2200 - 5000 / Ton |
At Reliable Pipes & Tubes, packaging is processed with standard anti-rust measures and sea transportation security rules. We ensure that your SS Pipe Fittings A403 304L reach safely and in perfect condition via the following packaging modes: