Jiaxing MT stainless steel co.,ltd.
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2507 / 2205 / 31803 / 32750 Duplex Steel Pipe / Tube , ASTM A789 / ASTM A790 Seamless Tube
Duplex stainless steel that was developed to combat common corrosion problems encountered with the 300 series stainless steels . “ Duplex ” describes a family of stainless steels that are neither fully austenitic , like 304 stainless , nor purely ferritic , like 430 stainless . The advantage of a duplex structure is that it combines the favorable qualities of a ferritic alloy ( stress corrosion cracking resistance and high strength ) with those of an austenitic alloy ( ease of fabrication and corrosion resistance ) .
Use UNS32750 super duplex stainless steel pipes can improve corrosion resistance compared to other materials . And super duplex steel pipes have greater tensile and yield strength , good ductility and yield strength , good stress corrosion cracking resistance . Also can help clients reduce their purchase costs , but can gurantee the quality etc .
| Material Grade | S32205 , S31803 , S32304 , S32750, F51 , F53 , 2205 , 2507 etc |
| Outer Diameter | 10.3mm - 1219mm |
| Wall Thickness | 1.24mm - 59.54mm |
| Length | as per customer’s requirement |
| Standard | ASTM A789 ; ASTM A790 ; EN 10216-5ect . |
Application :
1 . Petroleum
2 . Chemical industry
3 . Instrument
4 . Industrial transportation
5 . Mechanical structure industry
6 . Need high corrision ability pipe's industry , such as offshore industry etc
| Grade | C | Si | Mn | P | S | Cr | Ni | Mo | N |
| max | max | max | max | max | |||||
| UNS S32750 | 0.03 | 0.8 | 1.2 | 0.03 | 0.015 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 |
| UNS S31803 | 0.03 | 1 | 2 | 0.02 | 0.02 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
| UNS S31500 | 0.03 | 1 | 1.2-2.0 | 0.03 | 0.03 | 18.0-19.0 | 4.5-5.5 | 2.5-3.5 | 0.05-0.10 |
| Physical Properties | ||||
| Grade | Y.S.MPa min | T.S.Mpa min | Elongation % | Hardness HRC |
| UNS S32750 | 550 | 800 | 15 | 20 |
| UNS S31803 | 450 | 620 | 25 | 20 |
| UNS S31500 | 440 | 630 | 30 | 20 |
