Duplex

Multiple Forms & Standards

Duplex Stainless Steel

UNS S31803 – UNS S32205

Duplex Plate/Sheet
Duplex Seamless & Welded Tube
Duplex Seamless & Welded Pipe
Duplex Round Bar
Duplex Flanges F51
Duplex Specialty Forgings
Duplex Seamless & Welded BW Fittings

Trade NameUNSDuplex Industry SpecificationsChemical CompositionMin.Tensile (KSI)Min.Yield
(KSI)
Elongation
%
SAF 2205®
22Cr
UNS S31803
ASME SA-182 (F51), SA-240, SA-798, SA-790, SA-815
ASTM A182 (F51),A240, A276, A479, A789, A790, A815, A928,
A988
SAE J405
C 0.30 max

Cr
21.0-23.0
Mn 2.00 max
Mo
2.50-3.50
N 0.08-0.20
Ni 4.50-6.50
P 0.030 max
S 0.020 max
Si
1.00 max
906525
SAF 2205®
22Cr
UNS S32205ASME SA-182 (F60), SA-240, SA-798, SA-790, SA-815
ASTM A182 (F60), A240, A276, A479, A480, A798, A790,
A815, A928, A988
SAE J405
C 0.30 max
Cr 22.0-23.0
Mn
2.00 max
Mo 3.00-3.50
N 0.14-0.20
Ni 4.50-6.50
P 0.030 max
S
0.020 max Si 1.00 max
 956525

SAF 2205® is a registered trademark for Sandvik

General Duplex stainless steel information

The most widely used duplex (ferritic/austenitic) stainless steel grade is 2205 due to both its high strength and  resistance to corrosion resistance.   Over the years, the composition of duplex S31803 has been further refined, resulting in 1996 in the endorsement of restricted composition range Duplex UNS S32205 S32205 provides better corrosion resistance.  In fact, much of the Duplex S31803 currently produced also complies with Duplex S32205.  2205 is not generally suitable for temperatures above 300ºC due to precipitation of brittle micro constituents, nor below -50ºC because of its ductile-to-brittle-transition.

Duplex Applications

  1. Chemical processing, transport and storage,
  2. Oil and Gas exploration and processing equipment,
  3. Marine and other high chloride environments,
  4. Pulp and paper digesters, liquor tanks and paper machines.

Duplex Corrosion Resistance

S32205 offers excellent general corrosion resistance and is superior to Grade 316 in most environments, providing excellent resistance to localized corrosion including intergranular, pitting and crevice corrosion.  The CPT of S32205 is generally at least 35ºC with resistance to chloride stress corrosion cracking (SCC) at temperatures of up to about 150ºC.   With better sea water resistance than Grade 316, S32205 often performs well in environments where premature failure of austenitic grades is observed.

Duplex Heat Resistance

Duplex stainless steels are almost never used in environments above 300ºC.  While the grade has good resistance to high temperature oxidation S32205, like other duplex stainless steels, suffers from embrittlement even for short periods in temperatures above 300ºC.   This can only be rectified by a full solution annealing treatment.

Duplex Heat Treatment

Solution treatment (annealing) entails heating to 1020ºC-1100ºC and then rapid cooling. This grade cannot be hardened by thermal treatment, but does work harden.



Innovative
technologies
Forever on the lookout for new approaches, PM works closely with some of the best innovators in the industry.
industrial
solutions
We don’t push product; we push expertise.  Long a PM tagline, you’ll quickly discover our in-depth knowledge.
quick
service
We’re experts in dealing with multiple manufacturers, shippers & complex delivery schedules.  And we do it fast!
worldwide
partnerships
With offices in USA, UK & Norway, we understand the need to provide international services at a local level.

6Moly 6 Moly Duplex Super Duplex Titanium | PM International Suppliers

 

Call us

+1 863.644.6300
+1 877.717.6300 US Toll Free

Email us at

[email protected]

Fax us at

+1 863.644.0023

RFQ Super Duplex 6Moly Copper Nickel Alloys