ASTM A403 WP304H-S Fitting Elbow for Industrial Field, Stainless Steel Pipe Fitting
Brief Introduction
ASTM A403 WP304H-S Fitting Elbow is a high-temperature resistant stainless steel pipe fitting, strictly manufactured in accordance with ASTM A403 / ASME SA403 and ASME B16.9 standards. It is made of WP304H-S austenitic stainless steel (UNS S30409), a high-carbon variant of WP304-S, featuring excellent high-temperature strength, good corrosion resistance, superior weldability and stable mechanical properties. As a key pipeline connection fitting, it is mainly used for changing pipeline direction in industrial systems, with compact structure, easy installation and strong adaptability. It is suitable for low to medium pressure, high-temperature working conditions, widely applied in various industrial fields, and can stably convey high-temperature media such as steam, hot oil and high-temperature gas, serving as a reliable connection component for industrial pipeline systems.
Chemical Composition Analysis (wt%)
| Alloy Grade |
C |
Cr |
Ni |
Mn |
Si |
P |
S |
| ASTM A403 WP304H-S (UNS S30409) |
0.04-0.10 |
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 |
215-290 |
| Tensile Strength (Rm), MPa |
≥515 |
525-660 |
| Elongation (A), % |
≥40 |
42-50 |
| Hardness (HB), Brinell |
≤207 |
145-195 |
| Impact Toughness (KV), J (-20℃) |
≥60 |
75-105 |
| Creep Strength (1000h/500℃), MPa |
≥100 |
105-120 |
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 |
| High-Temperature Creep Test |
ASTM E139 |
