What material is A403 WP321 pipe fittings
WP321 is a pipe fitting made of stainless steel and is an anti-sulfur pipe fitting of the A403 standard. It is mainly used in industrial piping systems such as petrochemicals and petrochemicals, and has the characteristics of resistance to hydrogen sulfide corrosion.
what is chemical composition of A403 WP321 pipe fittings
| Composition | Content Range | Function |
|---|---|---|
| C | ≤0.08% | Controlling intergranular corrosion susceptibility |
| Cr | 17.00%–19.00% | Form a passive film to enhance corrosion resistance |
| Ni | 9.00%–12.00% | Stable austenite structure |
| Ti | ≥5×(C+N) ~ 0.70% | Stabilize carbides and inhibit intergranular corrosion |
| Mn | ≤2.00% | Improve hot working performance |
| Si | ≤1.00% | Deoxidizer, improve fluidity |
What are the characteristics of WP321 pipe fittings?
- High temperature resistance
Titanium allows the material to work stably in the range of 427°C–816°C for a long time, and can withstand a temperature of 816°C in a short period of time.
- Corrosion resistance
Resistant to acidic media such as sulfuric acid and phosphoric acid ;
Resistant to chloride stress corrosion cracking, suitable for marine environments (such as seawater desalination equipment) .
- Mechanical properties
Yield strength ≥205MPa, tensile strength ≥515MPa ;
Elongation ≥28% (better than ordinary 304 stainless steel)
What is the equivalent material of wp321 pipe fitting?
| Standard | Grade |
|---|---|
| ASTM | UNS S32100 / A403 WP321 |
| GB | 06Cr18Ni11Ti (S32168) |
| EN | 1.4541 |
