ASTM A403 WP304-S BW Elbow, High Corrosion Resistance Stainless Steel Butt Weld Elbow for Industrial Pipeline Systems
Brief Introduction
ASTM A403 WP304-S BW Elbow is a high-quality austenitic stainless steel pipe fitting, strictly manufactured in accordance with ASTM A403 (equivalent to ASME SA403) and ASME B16.9 standards. It is made of WP304-S stainless steel (UNS S30400), featuring excellent corrosion resistance, good weldability, stable mechanical properties and strong adaptability. Adopting butt weld (BW) forming process, it is a key pipeline connection component specially designed to change the direction of industrial pipelines, with compact structure, firm connection, high dimensional accuracy and reliable sealing performance. Suitable for low to medium pressure, normal temperature and mild corrosive working conditions, it is widely applied in various industrial and civil pipeline systems, serving as a durable and economical connection fitting for conveying water, gas, oil, chemical reagents and other media.
Chemical Composition Analysis (wt%)
| Alloy Grade |
C |
Cr |
Ni |
Mn |
Si |
P |
S |
| ASTM A403 WP304-S (UNS S30400) |
≤0.08 |
18.0-20.0 |
8.0-12.0 |
≤2.00 |
≤1.00 |
≤0.045 |
≤0.030 |
Typical Mechanical Properties
| Mechanical Property |
Standard Requirement (ASTM A403) |
Typical Value |
| Yield Strength (Rp0.2), MPa |
≥205 |
210-280 |
| Tensile Strength (Rm), MPa |
≥515 |
520-650 |
| Elongation (A), % |
≥40 |
42-50 |
| Hardness (HB), Brinell |
≤201 |
140-190 |
| Impact Toughness (KV), J (-20℃) |
≥60 |
70-100 |
| Bending Strength, MPa |
≥700 |
720-850 |
Available Tests
| Test Type |
Standard |
| Chemical Composition Test (PMI) |
Spectrometer, ASTM A403 |
| Tensile & Impact Test |
ASTM E8/E8M, ASTM A370 |
| Hardness Test |
ASTM E10 |
| Hydrostatic/Pneumatic Pressure Test |
ASTM A403, ASME B16.9 |
| Non-Destructive Testing (NDT) |
UT, RT, MT, PT (ASTM E165), Eddy Current Test |
| Corrosion Resistance Test |
ASTM G48, Salt Spray Test (ASTM B117) |
| Dimensional & Visual Inspection |
ASTM A403, ASME B16.9, Surface Defect Inspection |
| Microstructure Inspection |
ASTM E45, Metallographic Microscope Test |
| Weld Quality Test |
Weld Penetration Test, Weld Strength Test |
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