Duplex Stainless Steel Pipes And Tubes
Duplex Stainless Steel Pipes and Tubes Manufacturer, Stockholder
And Supplier
Duplex stainless steels are called “duplex” because they have a
two-phase microstructure consisting of grains of ferritic and
austenitic stainless steel. The picture shows the yellow austenitic
phase as “islands” surrounded by the blue ferritic phase. When
duplex stainless steel is melted it solidifies from the liquid
phase to a completely ferritic structure. As the material cools to
room temperature, about half of the ferritic grains transform to
austenitic grains (“islands”). The result is a microstructure of
roughly 50% austenite and 50% ferrite.
Whilst duplex stainless steel are considered resistant to stress
corrosion cracking, they are not as resistant to this form of
attack as ferritic stainless steel. However, the corrosion
resistance of the least resistant Duplex stainless steel is greater
than that for the most commonly used grades of stainless steel,
i.e. 304 and 316.
Duplex stainless steel are also magnetic, a property that can be
used to easily differentiate them from common austenitic grades of
stainless.
| Duplex Stainless Steel Pipe & Tubes Specification | ASTM A789, ASTM A790, ASTM A928, ASME SA789, ASME SA790, ASME SA928 |
| Duplex Stainless Steel Pipe & Tubes Grades | UNS S32205, UNS S31803, UNS S32750, UNS S32760, SAF® 2205, SAF®
2507, FERRINOX® 225, AMINOX® 225, ZERON® 100 |
| Duplex Stainless Steel Pipe & Tubes Type | Seamless / Welded / ERW / EFW / Cold Draw / Hot Finish / Cold
Finish |
| Duplex Stainless Steel Pipe & Tubes Outer Diameter Size | Seamless - 1/2" NB TO 18" NB
Welded / ERW- 1" NB TO 16" NB
EFW - 8" NB TO 110" NB |
| Duplex Stainless Steel Pipe & Tubes Wall Thickness | Schedule 10 to Schedule 160 (3 mm to 100 mm Thickness) |
| Duplex Stainless Steel Pipe & Tubes Length | 01 Meter to 12.5 Meters, Single Random Length, Double Random Length
And Customize Size. |
| Duplex Stainless Steel Pipe & Tubes Ends | Plain Ends / Beveled Ends |
| Duplex Stainless Steel Pipe & Tubes Delivery Conditions | As Rolled, Formed, Stress Relieved, Annealed, Hardened, Tempered,
Cold Draw, Bright Annealed |
| Duplex Stainless Steel Pipe & Tubes Coating | Electropolish, Mechanical Polish, Satin Finish, Passivated |
| Duplex Stainless Steel Pipe & Tubes Other Testing | Product Analysis, Transverse Tension Test, Flattening Test, Etching
Test, Radiograph HIC Examination, Stabilizing Heat Treatment,
Intergranular Corrosion Test, Weld Decay Test, Magnetic Particle
Detection, Grain Size Test, NACE 0175, Dual Grade, PWHT (POST WELD
HEAT TREATMENT), Flare Test, Bend Test, Hardness Test, Tensile Test
etc |
| Duplex Stainless Steel Pipe & Tubes Dimension | All Pipes Is Manufactured and Inspected / Tested to the Relevant
standards including ASTM And ASME |
| Duplex Stainless Steel Pipe & Tubes Value Added Services | Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Heat
Treatment |
| Duplex Stainless Steel Pipe & Tubes Packaging | Loose / Bundle / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps
/ Plastic End Caps / Beveled Protector |
| Duplex Stainless Steel Pipe & Tubes Shipment & Transportation | By Road - Truck / Train, By Sea - Break-bulk Conventional Vessel /
FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet
Container / 40 Feet Container / 45 Feet Container / High Cube
Container / Open Top Container, By Air - Freighter Civil Passenger
and Cargo Planes |
| Duplex Stainless Steel Pipe & Tubes Material Test Certificate | Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory
Test Certificate From NABL Approved Lab. / Under Third Party
Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS ETC |
Grade | C | Cr | Ni | Mo | Other |
301 | ≤0.15 | 16.0~18.0 | 6.00~8.00 | - | - |
301L | ≤0.030 | 16.0~18.0 | 6.00~8.00 | - | N≤0.20 |
304 | ≤0.08 | 18.0~20.0 | 8.00~10.50 | - | - |
304J1 | 0.02~0.05 | 16.5~17.1 | 7.5~7.9 | - | Cu1.9~2.2 |
304L | ≤0.030 | 18.0~20.0 | 9.00~13.00 | - | - |
304N1 | ≤0.08 | 18.0~20.0 | 7.00~10.50 | - | N0.10~ 0.25 |
304N2 | ≤0.08 | 18.0~20.0 | 7.50~10.50 | - | Nb≤0.15 |
316 | ≤0.08 | 16.0~18.0 | 10.00~14.00 | 2.00~3.00 | - |
316L | ≤0.03 | 16.0~18.0 | 12.00~15.00 | - | - |
321 | ≤0.08 | 17.0~19.0 | 9.00~13.00 | - | Ti5×C% |
409L | ≤0.03 | 17.0~19.0 | - | - | Ti6×C%~0.75 |
410L | ≤0.03 | 11.0~13.5 | - | - | - |
430 | ≤0.12 | 16.0~18.0 | - | - | - |
430J1L | ≤0.025 | 16.0~20.0 | - | - | Nb8(C%+N%)~0.8
Cu0.30~0.80 |
436L | ≤0.025 | 16.0~19.0 | - | 0.75~1.25 | Ti,Nb,Zr8
×(C%+N%)~0.8 |
410 | ≤0.15 | 11.5~13.5 | - | - | - |
420J1 | 0.16~0.25 | 12.0~14.0 | - | - | - |
420J2 | 0.26~0.4 | 12.0~14.0 | - | - | - |
2205 | 0.38~0.43 | 21~23 | 4.5~6.5 | 2.5~3.5 | - |
2507 | ≤0.03 | 24.0~26.0 | 6.00~8.00 | 3.0~5.0 | - |
Surface Finish
| Characteristics & Application |
| Hot-rolled surface, annealed and pickled, can be used as
cold-rolling material,industial tanks and chem i cal devices. |
| Cold-rolled, an nealed and pick led with out skinpassing the dull
prod ucts can be used as auto mo bile parts, build ing materrials
and pipings. |
| The surface brightness and flatness of NO.2B is better than NO.2D.
Then through a special surfacetreament to improve its mechamical
properties, N02B could nearly satisfy com pre hen sive uses. |
| Polished with abra sive belt of grit #100#120,have bet ter bright
ness with dis con tin u ous coarse stria, used as in ner and ex ter
nal or na ments for building, elec tri cal ap pli anc es and
kitchen uten sils etc. |
| Polished with abrasive belt of grit #150#180, have better
brightness with discontinuous coarse stria, but thinner than NO.3,
are used as bathtud buildinginner and external ornaments electrical
appliances, kitchen utensils and food processing equipment etc. |
| Polished with abrasive belt of grit #150-320 on the No.4 finish and
has continuous streaks, mainly used as building ornaments,
elevators, door of building, frontal plate etc. |
| Cold rolled, bright an nealed and skin passed, the prod uct has ex
cel lent bright ness and good re flex iv i ty like mirror, used for
lectrical appliances, mirror, kitch en apparatus, or na ment ma te
ri als etc. |
Product Applications
Good weldability and flame cutting, nonmagnetic. The shipbuilding
industry, welded constructions.
Physical properties (average values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 210
Density [g/cm3]: Approx. 7.80
Solution Annealing
Harden from a temperature of 1000-1050oC followed by water
quenching.
.
Product show
Manufacturing Technique
Certificate
Package | Standard export seaworthy package,suit for all kinds of transport,
or as required. |
Water-proof Paper + Edge protection + Wooden Pallets |
Bulk Size | Any size |
Loading Port | Tianjin, Xingang Port, Qingdao,Shanghai, Ningbo, or any China
Seaport |
Container | 1*20ft container load Max. 25 Ton, Max. length 5.8m |
1*40ft container load Max. 25 Ton, Max. Length 11.8m |
Delivery Time | 7-15 days or according to the order's quantity |
Duplex Stainless Steel Pipes and Tubes Applications
The Duplex Stainless Steel Pipes and Tubes are used in the
following applications:-
- Chemical Processing, Transport, and Storage
- Oil and Gas Exploration and Offshore Rigs
- Mil and Gas Refining
- Marine Environments
- Pollution Control Equipment
- Pulp & Paper Manufacturing
- Chemical Process Plant
FAQ
Q. Are you a factory or trading company?
A. We are a factory company.
Q. What is the MOQ?
A. Sample order is acceptable, And some samples can be free.
Q3. How do you control quality?
A3: Mill Test Certification is supplied with shipment, Third Party
Inspection is available.
Q. How many countries have you already exported?
A: Exported to more than 50 countries mainly from America, Russia,
UK, Kuwait, Egypt,Turkey, Jordan, India, etc.
Q. How do you resolve the problem with your products?
A. Person of aging services: For customer complaints commissioner set
up special complaint handling, complaint issues recorded the the
first time, and find the relevant person in charge of the feedback
and resolution. Details check our "Quality corrective action
report"
Q. How long do you need the delivery time?
1)Supply within 5-10days (product in our stock list)
2)Custom products need to be calculated according to the quantity
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is
15-20 days if the goods are not in stock, it is according to
quantity.
Q.How can we get your price?
A. We need the below information to quote for you:
1. Product Name
2. Standard
3. Material Grade (Chemical Composition)
4. Dimension
5. Quantity
6. The Drawing for Special Parts
