ASTM A790 UNS S32205 Duplex Stainless Steel Seamless Pipe
Duplex Stainless Steel Pipes, ASTM A790, S31803, S32205, S32750, , S31254MO.
YUHONG GROUP is professional in producing Austenitic Stainless Steel, Nickel Alloy Steel(Hastelloy , Monel, Inconel, Incoloy ) seamless and welded pipe and tube already more than 30 years, every year sell more than 100,000 tons of steel pipe and tube. Our client already cover more than 45 countries. And our group branch company and factory have been already approved by :ABS, DNV, GL, BV, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9001-2015, ISO 14001-2004.
Duplex Stainless Steel
UNS S32205, UNS S31803
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 Name |
UNS |
Duplex Stainless Steel Industry Specifications |
Chemical
Composition
|
Min.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 |
90 |
65 |
25 |
SAF 2205®
22Cr |
UNS S32205 |
ASME 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 |
95 |
65 |
25 |
SAF 2205® is a registered trademark for Sandvik
General Duplex stainless steel information
2205 is the most widely used duplex (ferritic/austenitic) stainless steel grade. It finds applications due to both excellent corrosion resistance and high strength. The standard duplex S31803 composition has over the years been refined by many steel suppliers, and the resulting restricted composition range was endorsed as UNS S32205 in 1996. Duplex S32205 gives better guaranteed corrosion resistance, but for much of the Duplex S31803 currently produced also complies with Duplex S32205. 2205 is not generally suitable for use at temperatures above 300ºC as it suffers from precipitation of brittle micro-constituents, nor below -50ºC because of its ductile-to-brittle-transition.
Duplex Applications
Chemical processing, transport and storage,
Oil and Gas exploration and processing equipment,
Marine and other high chloride environments,
Pulp and paper digesters, liquor tanks and paper machines.
Duplex Corrosion Resistance
Excellent general corrosion resistance; superior to Grade 316 in most environments. Excellent resistance to localized corrosion including intergranular, pitting and crevice corrosion; the CPT of 2205 is generally at least 35ºC. The grade is also resistant to chloride stress corrosion cracking (SCC) at temperatures of up to about 150ºC. Grade 2205 will often perform well in environments which cause premature failure of austenitic grades. It has better resistance to sea water then Grade 316.
Duplex Heat Resistance
Although 2205 has good high temperature oxidation resistance, this grade - like other duplex stainless steels - suffers from embrittlement if held for even short times at temperatures above 300ºC. If embrittled, this can only be rectified by a full solution annealing treatment. Duplex stainless steels are almost never used above 300ºC.
Duplex Heat Treatment
Solution treatment (annealing) - heat to 1020ºC-1100ºC and cool rapidly. This grade cannot be hardened by thermal treatment, but does work harden.
Classification Society Criterion:CSS,DNV,GL,LR,NK,KR,ABS,BV
Some of the quality tests carried out by us includes:
| Corrosion Test |
Conducted only when specially requested by the client |
| Chemical Analysis |
Test done as per required quality standards |
| Destructive / Mechanical Testing |
Tensile | Hardness | Flattening | Flare | Flange |
| Reverse-bend and Re. flat tests |
Carried out in full compliance with relevant standards & ASTM A-450 and A-530 norms, which ensures trouble-free expansion, welding & use at customers end |
| Eddy Current Testing |
Done to detect homogeneities in subsurface by using Digital Flaw-mark Testing System |
| Hydrostatic Testing |
100% Hydrostatic Testing carried out according to ASTM-A 450 norms for checking tube leakage, and biggest pressure we can support 20Mpa/7s . |
| Air Under Pressure Test |
To check any evidence of air leakage. |
| Visual Inspection |
After passivation, every single length of tubes & pipes is subjected to thorough visual inspection by trained staff for detecting surface flaws & other imperfections |
Supplementary Testing : Apart from the above mentioned tests, we also carry out on the manufactured products supplementary testing. The tests conducted under this include:
-
Eddy Current Testing
-
O.P Testing
-
Radiography Testing
|
-
Corrosion Testing
-
Micro Testing
-
Macro Testing
|
-
IGC Testing
-
Ultrasonic testing
-
Liquid Penetrate testing
|
