China Butt Weld Fittings manufacturer

TOBO GROUP  

TOBO International Trading(Shanghia)Co.,Ltd       Tianda Oil Pipe Co., Ltd

TOBO Pipeline Equipment Co.,Ltd        TPCO & TISCO Pipe(Tianjin)Co.,Ltd.                        

News

August 5, 2021

Welding STD Alloy Steel UNS S31254 Butt Welding Tee

Butt Welding Pipe Tee Fittings A403 WPS31254 A960 UNS S31254 1-24" STD Alloy Steel Equal Tee

 

 

Quick Details

 

Material Stainless Steel Brand Name TOBO  
Technics Cold - forming, Hot - forming Connection Welding  
Type elbow Shape Equal  
Place of Origin China Head Code Round  

 

 

Packaging & Delivery

 

Packaging Details: Packing: plywood case or fumigated woodern case or as per customers' requests.
Delivery Detail: 2 - 15 days after receiving the deposit

 

Specifications

Duplex Steel UNS32750/31803/31254 45degree Pipe Elbow

1.Mertiarial: 304/304L/304H, 316/316L, 317L, 904L, 321/321H, 347H, S31803, S32750.etc.

2.Standard: GB/ANSI/ASME/DIN/JIS
3.Size: 1/2" - 48"

 

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 Name

UNS

Duplex 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 Si1.00 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

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

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.

 

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