Due to the fact that Grade UNS S31803 has a mixed austenitic and ferritic microstructure, it is classified as a duplex class. Due to the fact that duplex stainless steel alloys contain an equal amount of austenite and ferrite, duplex steel fittings are able to exhibit properties that are characteristic of both classes. In comparison to grade 316L and grade 317L, the localised corrosion resistance of duplex steel buttweld fittings is significantly higher. As a result, these duplex steel fittings are utilised in applications that involve a variety of essential business sectors, such as chemical plants, seawater pumps, seawater desalination plants, and a number of other similar establishments. The number 1.4462 of the Werkstoff. Intergranular corrosion is something that can be avoided with the use of duplex steel pipe fittings, especially in environments that contain chlorides and sulphides. In the normal course of events, a regular steels grade would be susceptible to getting degraded in these conditions. On the other hand, Duplex Stainless Steel Fittings exhibit an extremely high level of resistance to stress related corrosion cracking..
When compared to ferritic stainless steel elbow fittings, UNS S31803 Duplex Steel Elbow fittings have, in most instances, the tendency to be a more durable material. In contrast, the mechanical strengths of duplex stainless steel fittings can in some cases, for example UNS S31803, be up to two times more than that of conventional austenitic stainless steels. This is because duplex stainless steel fittings are made up of two different types of austenitic stainless steel. The high chromium content that is present in the alloy is what protects the Duplex Steel Forged Fittings from corrosion. However, this same high chromium content is what, in most cases, causes embrittlement at temperatures that are higher than 300 degrees Celsius.
Standard Specification : | Duplex Steel Fittings |
Coating Fitting Faces : | Cold and Hot Dip Galvanized, Yellow Transparent, Oil Black Paint, Zinc Plated, Anti-rust Paint |
Dimensions Class: | 2000#, 3000#, 6000#, 9000# |
Application: | Nuclear Power Plant Water Pipeline Industry Chemical Industry Oil And Gas Industry Fabrication Industry Natural Gas Industry |
Rating Pressure: | Pressure Rating Of: 3000 LBS, 6000 LBS, 9000 LBS |
Check Sizes: | (SMLS UPTO 24”) 1/2” TO 36” (Buttweld 8” TO 36” ) |
Fitting Machining Equipment: | Press machine, electric bevelling machine, Bending machine, Pushing Machine, Sand-blasting machine etc |
Thickness: | View Our Thickness: Schedule 5S, SCH10, SCH20, SCH10, SCH20, SCH30, SCHTD, SCH40, SCH60, XS, SCH80, SCH100, SCH120, SCH140, SCH160. |
Standard: | MSS-SP-43 Type B Fittings, ANSI B16.28 Fittings, JIS B2312 Fittings, JIS B2313 Fittings, ANSI B16.9 Fittings, MSS-SP-43 Type A Fittings, MSS-SP-43 Type b Fittings |
Grade | S31803 |
C | 0.030 maximum |
Mn | 2.00 maximum |
Si | 1.00 maximum |
P | 0.030 maximum |
S | 0.020 maximum |
Cr | 22.0 – 23.0 |
Mo | 3.0 – 3.5 |
Ni | 4.50 – 6.50 |
N | 0.14 – 0.20 |
Fe | 63.72 min |
Gr. | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
S31803 / S32205 | 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |