ASTM A403 WP304H Stainless Steel Buttwelded Elbow
Name:ASTM A403 WP304H Stainless Steel Buttwelded Elbow
Elbow Degree:30° 45° 60° 90° 180°,etc
Wall Thickness：Sch40
Material：Stainless Steel
Technics：Forged
Certification:ASME, ANSI, DIN, JIS, GB
Size:1/2"-36" Seamless, 26"-110" Welded
Standard:ANSI B16.9, En10253-2, DIN2605,
Radius:Lr/Long Radius/R=1.5D,Sr/Shrot Radius/R=1d
End:Bevel End/Be/Buttweld
Application:Petroleum, Natural Gas, Water Disposa etc.
Send E-mail:info@gneestainless.com
Tel:+8615824687445
Description
Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of astm a403 wp304h stainless steel buttwelded elbow in China. With abundant experience, we warmly welcome you to wholesale customized astm a403 wp304h stainless steel buttwelded elbow from our factory. For price consultation, contact us.
As a leading manufacturer of 304 stainless steel pipe fittings, GNEE provides a wide range of fittings such as flanges, unions, elbows, and more. We produce all these product series in-house. One of our key products is the ASTM A403 WP304H standard elbow, which is used to change the direction and angle of pipeline flow. The elbow radius can be either long or short.
The ASTM A403 WP304H stainless steel weld neck elbow we supply is made from high-carbon 304 stainless steel (Grade 304H) and is designed to redirect the fluid flow within piping systems. The designation "WP" indicates seamless or welded austenitic stainless steel pipe fittings produced by forging, rolling, or extrusion processes, followed by mandatory heat treatment; the letter "H" indicates a high-carbon grade.Compared with standard 304 stainless steel, 304H contains a higher carbon content (0.04%–0.10%), which significantly improves its high-temperature strength and creep resistance, allowing it to operate reliably at temperatures up to 870°C.
ASTM A403 WP 304H Stainless Steel Pipe Fittings Specifications
| Material Grade | WP304H / UNS S30409 |
| Standard | ASTM A403 (Wrought Austenitic Stainless Steel Piping Fittings) |
| Fitting Type | Elbow (90°, 45°, 180°) |
| Radius Type | Long Radius (LR - 1.5D) / Short Radius (SR - 1.0D) |
| Dimensional Std | ASME B16.9 (Factory-Made Wrought Buttwelding Fittings) |
| Wall Thickness | Schedule 10S, 40S (STD), 80S (XS), 160, XXS |
| Size Range | 1/2" to 48" (NPS) |
ASTM A403 WP304H Stainless Steel Chemical Composition
|
WP GRA. |
UNS GRA. |
CHEMICAL COMPOSITION % Maximum | ||||||
|---|---|---|---|---|---|---|---|---|
| C | MN | P | S | Si | NI | Cr | ||
| WP304 | S30400 | 0.08 | 2.0 | 0.045 | 0.030 | 1.00 | 8.0-11.0 | 18.0-20.0 |
| WP304H | S30409 | 0.04-0.10 | 2.0 | 0.045 | 0.030 | 1.00 | 8.0–11.0 | 18.0-20.0 |
ASTM A403 WP304H Stainless Steel Fitting Tensile Requirements
|
WP GRA. |
Yield Strength, min, ksi [MPa] |
Tensile Strength, min, ksi [MPa] |
| WP304H | 30[205] |
75[515] |
Heat Treatment & Grain Size
| Process | Requirement |
| Solution Annealing | Minimum 1900°F (1040°C) followed by rapid cooling. |
| Grain Size | ASTM No. 7 or coarser (Required to ensure creep resistance). |
Common Dimensional Parameters
| NPS (Size) | 90° LR Center-to-End (A) | 45° LR Center-to-End (B) | 90° SR Center-to-End |
| 1/2" | 38 mm (1.5") | 16 mm (0.62") | - |
| 1" | 38 mm (1.5") | 22 mm (0.88") | 25 mm (1.0") |
| 2" | 76 mm (3.0") | 35 mm (1.38") | 51 mm (2.0") |
| 4" | 152 mm (6.0") | 64 mm (2.5") | 102 mm (4.0") |
| 6" | 229 mm (9.0") | 95 mm (3.75") | 152 mm (6.0") |
| 10" | 381 mm (15.0") | 159 mm (6.25") | 254 mm (10.0") |
Common industrial applications:
Oil and gas processing units;
Chemical and petrochemical refineries;
Power plants and industrial steam boilers;
Heat exchangers and pressure vessels.
If you need help selecting parts, please let me know:
What angle and size/schedule do you require?
What is the operating temperature and pressure of your system?
Product Testing
100% eddy current testing is performed in accordance with electromagnetic testing methods applicable to stainless steel pipe fittings.
Hydrostatic testing at 20–30 MPa is conducted to verify sealing performance and structural integrity.
Pickling and passivation treatments are applied to form a uniform protective film.
Non-destructive testing (RT/UT) and special surface treatments (such as polishing) are available upon request.
Professional stainless steel pipe fittings supplier - GNEE
GNEE supplies 180° short radius elbows conforming to ASTM A403 standards and holds complete ASTM/ASME certifications (EN 10204 3.1/3.2). We offer a full range of sizes and wall thicknesses from SCH10 to SCH160, and can also customize products to meet specific customer needs. Every product undergoes rigorous quality inspection.
GNEE PACKAGING AND SHIPPING
Products are packaged in export-standard safe packaging, including fumigation-free wooden crates, foam protection, plastic film wrapping, and pallet reinforcement.
FAQ
What is the difference between WP304 and WP304H?
WP304 has a maximum carbon content of 0.08%, whereas WP304H has a carbon content controlled between 0.04% and 0.10%. This provides superior high-temperature strength and creep resistance, making it suitable for service temperatures up to approximately 870°C.
Which dimensional standards apply to the elbows?
Butt-weld fittings comply with ASME B16.9; short-radius elbows comply with ASME B16.28; and lightweight fittings comply with MSS-SP-43.
What heat treatment is required for WP304H fittings?
In accordance with ASTM A403, solution annealing is required at a minimum temperature of 1040°C (1900°F), followed by water quenching or rapid cooling.
Can you provide products with other angles and radii?
Yes. We offer 45°, 90°, and 180° elbows across the full size range, available in both Long Radius (LR) and Short Radius (SR) specifications.
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