ASTM A789 / A790 2507 / 2205 Duplex Steel Pipe With High Tensile
Strength
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 - 54.59mm |
| 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
| Chemical Composition |
| 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 |
| 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 | /
|
Material Grade: S32205, S31803, S32304, S32750, F51, F53, 2205,
2507 etc
Outer Diameter: 10.3mm-1219mm
Wall Thickness: 1.24mm-59.54mm
Length: Normally fixed length 6m, can as per customer’s requirement
Standard: ASTM A789; ASTM A790; EN 10216-5ect.
Process Method: Cold Drawn or Cold Rolled
Application
a) Petroleum
b) Chemical industry
c) Instrument
d) Industrial transportation
e) Mechanical structure industry
f) Need high corrision ability pipe's industry, such as offshore
industry etc
Advantages
a) Superior surface finish,
b) Better mechanical property
c) More precise dimension
d) Perfect inspection method and inspection equipment
