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UNS S32750 Super Duplex Stainless Steel Pipe Seamless Round Tube ASTM A789 Descaled

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UNS S32750 Super Duplex Stainless Steel Pipe Seamless Round Tube ASTM A789 Descaled

China UNS S32750 Super Duplex Stainless Steel Pipe Seamless Round Tube ASTM A789 Descaled supplier
UNS S32750 Super Duplex Stainless Steel Pipe Seamless Round Tube ASTM A789 Descaled supplier UNS S32750 Super Duplex Stainless Steel Pipe Seamless Round Tube ASTM A789 Descaled supplier UNS S32750 Super Duplex Stainless Steel Pipe Seamless Round Tube ASTM A789 Descaled supplier UNS S32750 Super Duplex Stainless Steel Pipe Seamless Round Tube ASTM A789 Descaled supplier

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Product Details:

Place of Origin: CHINA
Brand Name: SPEZILLA
Certification: ISO9001:2008, PED 97/23/EC
Model Number: UNS S31803, S32750

Payment & Shipping Terms:

Minimum Order Quantity: Negotiation
Price: Negotiation
Packaging Details: BUNDLES BY FCL
Delivery Time: 10 DAYS
Payment Terms: T/T or L/C
Supply Ability: 1000 TONS / MONTH
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Detailed Product Description
Material Type: UNS S32750 Tube Production: COLD DRAWN
Outside Diameter: 1/4'' - 4'' Wall Thickness: 0.035'' - 0.120''
Finish Type: SOLUTION ANNEALED Standards: ASTM A789/789M

UNS S32750 Super Duplex Stainless Steel Pipe Seamless Round Tube ASTM A789 Descaled

 

 

 

Characteristic of Super Duplex Seamless Stainless Steel Tubing:

 

1. Good to very good resistance to uniform corrosion

 

2. Good to very good resistance to pitting and crevice corrosion

 

3. High resistance to stress corrosion cracking and corrosion fatigue

 

4. High mechanical strength

 

5. Good abrasion and erosion resistance

 

6. Good fatigue resistance

 

7. High energy absorption

 

8. Low thermal expansion

 

9. Good weldability

 

 

Chemical Properties:

Typical values (Weight %)

 

C Cr Ni Mo N Others
0.020 25 7 4.0 .27 S=0.001

 

Mechanical Properties:

 

Ultimate Tensile Strength, ksi 116 min.
0.2% Offset Yield Strength 0.2%, ksi 80 min.
0.1% Offset Yield Strength 0.2%, ksi 91 min.
Elongation in 2 inches, % 15 min.
Hardness Rockwell C 32 max.
Impact Energy, ft.-lbs. 74 min.

 

Corrosion Resistance:

 

Super Duplex Seamless Stainless Steel Tubing are extremely corrosion resistant. They have high resistance to intergranular corrosion. Even in chloride and sulphide environments, duplex stainless steels exhibit very high resistance to stress corrosion cracking.

 

The super duplex grades are even more resistant to corrosion.

 

Heat Resistance:

 

The high chromium content of duplex and super duplex seamless stainless steel tubing that protects against corrosion, causes embrittlement at temperatures over about 300°C.

 

At low temperatures duplex stainless steels have better ductility than the ferritic and martensitic grades. Duplex grades can readily be used down to at least -50°C.

 

Machinability:

 

Although machinable, the high strengths of duplex stainless steels makes machining difficult. As an example, machining of 2205 is around 20% slower than for 304.

 

Machining can be enhanced by using the following rules:

 

Cutting edges must be kept sharp. Dull edges cause excess work hardening.

 

Cuts should be light but deep enough to prevent work hardening by riding on the surface of the material.

 

Chip breakers should be employed to assist in ensuring swarf remains clear of the work

 

Low thermal conductivity of austenitic alloys results in heat concentrating at the cutting edges. This means coolants and lubricants are necessary and must be used in large quantities.

 

Heat Treatment:

 

Duplex stainless steels cannot be hardened by heat treatment. They can however be work hardened.

Solution treatment or annealing can be done by rapid cooling after heating to around 1100°C.

 

Weldability:

 

Duplex stainless steels have good weldability. All standard welding processes can be used. They are not quite as easily welded as the austenitic grades but low thermal expansion in duplex grades reduces distortion and residual stresses after welding. The recommended filler material for 2205 stainless steel is 2209.

 

 

Applications of :

 

Pulp and paper industry


Desalination plants


Flue-gas cleaning


Cargo tanks and pipe systems in chemical tankers

 

Seawater systems

 

Firewalls and blast walls on offshore platforms

 

Bridges


Components for structural design


Storage tanks

 

Pressure vessels


Heat exchangers


Water heaters


Rotors, impellers and shafts


Reinforcing bars for concrete structures

 

UNS S32750 Super Duplex Stainless Steel Pipe Seamless Round Tube ASTM A789 Descaled

 

Contact Details
Spezilla Tube Co., Ltd.

Contact Person: Will Ma

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