ZIZI ENGINEERING CO.,LTD
ZIZI ENGINEERING CO., LTD
Add to Cart
UNS S31803 pipe cap is a duplex stainless steel pipe fitting with microstructure of 50:50 austenite and ferrite. It combines good mechanical strength and ductility with moderate to good corrosion resistance in a variety of environments.
| Size | 1/2" - 60" |
| Wall Thickness | Sch10s, 20, 40, STD, XS, 80, 100, 120, 140, 160, XXS |
| Standard | ASME B16.9, B36.19 |
| Types | Seamless Cap, Welded Cap |
| Stainless Steel Cap | ASTM A403 WP304/304L, WP304H, WP316/316L, WP310, WP317, WP321 |
| Duplex Steel Cap | ASTM A815 UNS S 31803, S 32205, S 32550, S 32750, S 32760 |
| Carbon Steel | ASTM A234 WPB, A860 WPHY42, 52, 60, 65, 70 |
| Low Temp Carbon Steel Cap | ASTM A420 WPL3, WPL6, WPL9 |
| Alloy Steel Cap | ASTM A234 WP1, WP5, WP9, WP11, WP12, WP22, WP91 |
Both seamless pipe cap and welded pipe cap are commonly used, so do you know what are their differences?
1. Produce process.
2. Surface: Welded cap have a welded joint at the surface, while seamless pip cap does not.
3. Marking: The marking will contain SMLE or Welded for easy identify.
4. Application: Seamless pipe fittings can bear higher pressure than welded pipe fittings, so seamless cap always applied in high pressure applications while welded cap is mainly for medium and low pressure applications.
Chemical Composition
| C | Si | Mn | P | S | Ni | Cr | Mo |
| 0.03 | 1 | 2 | 0.03 | 0.02 | 4.5-6.5 | 21-23 | 2.5-3.5 |
Mechanical Properties
| Tensile Strength | Yield Strength | Elongation | Hardness |
| 621 | 448 | 25 | 293 |