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Duplex/Super Duplex Stainless Steel Pipes And Tubes A790 S32750 (2507, 1.4410) , SA789 S31803(2205,1.4462),
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Brand Name:YUHONG
Certification:ABS, VC, LR, GL, DNV, NK, TS, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Price:negotiable
Delivery Time:10days->
Payment Terms:T/T, L/C
Supply Ability:1500 tons per month
Model Number:S32750 (2507, 1.4410) ,S31803(2205, 1.4462),
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Contact Person
Jikin Cai
Business Type:
Manufacturer Distributor/Wholesaler Importer Exporter Trading Company Seller Other
Officials:
20TH FLOOR,NO.1 NEW WORLD BUILDING ,NO.1018 MINAN ROAD,YINZHOU DISTRICT, NINGBO CITY, ZHEJIANG PROVINCE, CHINA
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Product Details
Company Profile
Product Details
Duplex/Super Duplex Stainless Steel Pipes And Tubes A790 S32750 (2507, 1.4410) , SA789 S31803(2205,1.4462),
YUHONG GROUP deal with Austenitic Stainless Steel, Duplex and Super Duplex
Stainless Steel, Nickel Alloy Steel(Hastelloy , Monel, Inconel,
Incoloy ), Copper Alloy Steel seamless and welded pipe and tube
already more than 33 years, every year sell more than 15000 tons.
Our client already cover more than 75 countries, Like Italy, UK,
Gernmany, USA, Canada, Chile, Colombia, Saudi Arabia, Korea,
Singapore, Austrial, Poland, France , ....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 14001-2015,ISO 18001-2015.
2205 alloy (UNS S31803 and/or S32205) is a nitrogen-enhanced duplex
stainless steel alloy. The nitrogen serves to significantly improve
the
corrosion resistance of the alloy; especially in the welded
condition. Earlier duplex alloys have had moderate resistance to
general corrosion
and chloride stress corrosion cracking, but suffered a substantial
loss of properties when used in the as-welded condition. To impart
the
metallurgical benefits of nitrogen to both improved corrosion
performance and as-welded properties, the 2205 alloy is produced to
a
0.15% minimum nitrogen content compared to the ASTM range of
0.08-0.20% for S31803 and 0.14-0.20% for S32205. The minimum Cr,
Mo and Ni contents of 2205 alloy (22.0, 3.1 and 5.5% respectively)
satisfy the requirements of both the UNS S31803 and S32205
composition specifications. The typical high Cr, Mo and Ni contents
of 2205 alloy give it a high PRE N (Pitting Resistance Equivalent)
of 35.8,
further enhancing its corrosion resistance. The PRE N of 2205 alloy
exceeds those of types 316L and 317L stainless steels.
Duplex 2507 is a super duplex stainless steel developed for applications that demand high strength and corrosion resistance. Alloy 2507 has 25% chromium, 4% molybdenum, and 7% nickel. This high molybdenum, chromium and nitrogen content causes high resistance to chloride pitting and crevice corrosion attack and the duplex structure provides 2507 with exceptional resistance to chloride stress corrosion cracking.
Using Super DuplexUNS S32750 must be restricted to applications below 600° F (316° C). Extended
elevated temperature exposure can reduce both the toughness and
corrosion resistance of alloy 2507.
The steel combines high mechanical strength (typically up to 570
MPa yield strength) and good ductility with outstanding corrosion
resistance in marine environments. The alloy is supplied with a
PREN (Pitting Resistance Equivalent) at >= 40.0 which guarantees
high resistance to pitting corrosion. In addition, the steel offers
high resistance to crevice corrosion and stress corrosion cracking.
Ambient and sub-zero (down to minus 50°C) notch ductility is good.
These attributes mean that this super duplex steel can be used
successfully as an alternative to 300 series stainless steel (such
as type 316), standard 22% Cr duplex steel (such as UNS S31803 /
1.4462 with PREN 33-34) and precipitation hardening stainless
steels (typically 17/4PH).
Chemical Composition of ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes
| Elements | C | Cr | Cu | Fe | Mo | Mn | N | Ni | P | S | Si | W |
| Minimum | 24.0 | REMAINDER | 3.00 | 0.24 | 6.00 | 0.20 | 0.50 | |||||
| Maximum | 0.030 | 26 | 0.50 | 5.00 | 1.20 | 0.32 | 8.00 | 0.035 | 0.020 | 0.80 | 1.00 |
Mechanical Properties of ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes
| 0.2% Proof Stress (N/mm2 ) [ksi] minimum | 550[79.8] |
| Ultimate Tensile Strength (N/mm2) [ksi] minimum | 800 [116] |
| Elongation (%) minimum | 25 |
| ardness (HBN) | 270 max |
| Reduction of Cross Section Area (%) | 45 |
| Charpy V-notch Impact at ambient Temp (J) [ft.lb] | 80min [59min] |
| Charpy V-notch Impact at -46°C (J) [ft.lb] | 45av, 35min [33av, 25.8min] |
| Additional Testing | |
| ASTM G48A Corrosion test at 40°C | No pitting and weight loss < 4.0g/m2 |
| Ultrasonic Testing | According to ASTM A388 |
| Ferrite Content | 35%-55% |
| Microstructure | Microstructure certified free from grain boundary carbides, sigma, chi and laves phases |
Alloy Comparison Super Duplex Stainless Steel
| Alloy Comparisons | S31803 | S17400 (17-4PH) | 718( ST) | S31254 | Alloy 32750 |
| 0.2% Proof Strength (N/mm2), minimum | 450 | 1070 | 550 | 300 | 550 |
| Corrosion Rate (mm.y-1) Seawater | < 0.01 | ~1 | < 0.01 | < 0.01 | < 0.01 |
| Corrosion Rate (mm.y-1) 10% sulphuric acid at 80°C | < 0.4 | 10 | >1 | 1.5 | < 0.15 |
| Corrosion Rate (mm.y-1) Boiling 50% nitric acid | < 0.15 | < 0.15 | < 0.15 | 0.4 | < 0.15 |
| Wear Properties related to Hardness (HBN) | RC25 | RC38 | RC20 | RC20 | RC28 |
Main Features of UNS S32750 Super Duplex Stainless Steel
- UNS S32750 has excellent corrosion resistance in a wide variety of corrosive chemicals
- Outstanding resistance to pitting and crevice corrosion in seawater and other chloride containing environments, with Critical Pitting Temperature exceeding 50°C
- High strength compared to austenitic and 22%Cr duplex stainless steels
- Excellent ductility and impact strength at both ambient and sub-zero temperatures
- High resistance to abrasion, erosion and cavitation erosion
- Excellent resistance to stress corrosion cracking in chloride containing environments
- UNS S32750 is listed in NACE MR 01 75 for sour service
- ASME Approval for Pressure Vessel application
Application of ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes
- Chemical Process Industry: Due to its high corrosion resistance UNS S32750 is ideal for use in Nitric Acid Processes, Polypropylene Production, PVC Production, Dioxide, Caustic Evaporators, and Equipment.
- Handling Organic and Fatty Acids.
- Marine Industry and Shipbuilding: Propellers and Shafts, Rudders, Shaft Seals, Pumps, Bolts and Fasteners, Valves, Instrumentation, Oil and Chemical Tankers
- Oil and Gas Industry: Pumps, Valves, Pipe, Vessels, Wellhead Equipment, Subsea Equipment
- Pollution Control: Fans and pumps, Wet Scrubbers, Incinerators
- Pulp and Paper Industry: Black liquor heater tubes, Digester Blow Valves, Rotary Feed Valves, I.D.Fans, Brownstock Washers, Precipitators, Bleaching Components
- Food Industry: Sugar Cane Centrifuges, Corn and Vegetable processing plant
- Agrochemicals: Fertilizer Production (Wet phosphoric acid)
- Civil Engineering: Sewage Treatment
Company Profile
Yuhong Group Co.,Ltd
YUHONG HOLDING GROUP is one of the largest Procurement, Engineering &
Contracting Group companies in China. Our group branch company and factory have been already
approved by : ABS, LR, DNV, GL, BV, CCS, KR, PED 97/23/EC, AD2000-WO,
GOST9941-81, CCS, TS, CNNC, ISO9001-2015, ISO 14001, ISO 18001, API
5L , API 5CT , API 6D, And our branch company Zhejiang Yuhongwell Steel Co.Ltd has expanded
its field of activities and entered in trade and supply of tubular
& flat products in Duxplex and Super Duplex, Stainless Steel, Nickel Base alloy Steel ,Cr-Mo alloy steel , Copper Nickel alloy steel,Carbon Steel for our reputed clients worldwide. These products are widely used
in various important sectors like Mining, Energy, Boiler & Heat
Exchanger, Petrochemical, Chemical Industry, Food plant, Paper
plant, Gas and Fluid Industry etc.
YUHONG HOLDING GROUP has gained rich experience in
Pipes, Fittings, Flanges, Valves, Structural steel, Coils and
Plates in past eight years. In a short span of
time, YUHONG brand has marked its global presence in
more than 40 countries, like, Korea, USA, Canada, Mexico, Colombia,
Bolivia, Chile, Argentina, Brazil, Ecuador, Austria, New Zealand,
Singapore, Malasyia, Indonesia, Thailand, Vietnam, Ukraine,
Turkey,Sauid Arabia, Qatar, U.A.E,Israel,India, UK, France, Italy,
Gernmany, Poland, Spain,... We have successfully
implemented the orders of Cross Country Pipelines for our valuable
customers. In addition, we have also developed a huge network of
contacts and strategic alliances with most important manufacturers
an stockists around the world.
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