Spezilla Tube Co., Ltd. 

Excellence in Stainless Steel Tubing

Home ProductsStainless Steel Heat Exchanger Tube

Seamless Duplex Stainless Steel heat exchanger u tube ASTM A789 UNS S31803 Grade 2205 OD15.88 X 2.11MM

Very competitive price and the tubes are well polished, we are very satisfied with Spezilla from our cooperation since year 2010.

—— Nathalie Gulli - Mexico

Spezilla supports our group very well, and now we are approved supplier of goverment, they are reliable and flexible! Spezilla always answers!

—— Jaime Arias - Argentina

Good quality, fast delivery, Spezilla has been supplying heat exchanger tubes for our projects since 2008, we really appreciate your support!

—— Massimiliano Rossi - Italy

I'm Online Chat Now

Seamless Duplex Stainless Steel heat exchanger u tube ASTM A789 UNS S31803 Grade 2205 OD15.88 X 2.11MM

large.img.alt
small.img.alt small.img.alt small.img.alt small.img.alt

Large Image :  Seamless Duplex Stainless Steel heat exchanger u tube ASTM A789 UNS S31803 Grade 2205 OD15.88 X 2.11MM

Product Details:
Place of Origin: CHINA
Brand Name: SPEZILLA
Certification: ISO9001:2008
Model Number: ASTM A789
Payment & Shipping Terms:
Minimum Order Quantity: Negotiation
Price: Negotiation
Packaging Details: WOODEN BOXED
Delivery Time: WITHIN 30 DAYS
Payment Terms: T/T, L/C
Supply Ability: 100 TONS / MONTH
Detailed Product Description
Product Name: Stainless Steel U Tube Standard: ASTM A789
Steel: Duplex STAINLESS STEEL TYPE: SEAMLESS
Material: UNS S31803 Shape: ROUND TUBING
Production: U BENT Anneal: STRESS RELIEVED
Package: Wooden Case Application: Heat Exchanger
High Light:

u bend tube

,

aluminium extruded finned tubes

Seamless Duplex Stainless Steel heat exchanger u tube ASTM A789 UNS S31803 Grade 2205 OD15.88 X 2.11MM

 

 

Description: 

 

The 2205 S.S. (UNS S31803) alloy is probably the most recognized and widely used of the many duplex stainless steels. As the name duplex implies, it has a dual phase microstructure of both austenite and ferrite. In other words, duplex alloys have the strength of ferritic (400 series) S.S. while retaining the corrosion resistance of the austenitic (300 series) S.S.

 

Exceptional resistance to pitting and crevice corrosion

 

• High resistance to stress corrosion cracking in chloride bearing Environments

 

• Good sulfide stress corrosion resistance

 

• Greater resistance to hydrogen embrittlement

 

• Very high mechanical strength

 

• High energy absorption

 

• Low coefficient of thermal expansion

 

• Good workability and weldability

 

Specifications:


ASTM A789 Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service


ASTM A790 (ASME SA790) Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe


ASTM A928 (ASME SA928) Standard Specification for Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal

 

Corrosion: 

 

The duplex stainless steels have general corrosion resistance comparable Resistance to 316 S.S. and even exceed it in many applications. In addition, their particular combination of higher chromium, molybdenum and nitrogen gives the duplexes more resistance to localized forms of corrosion such as pitting, crevice and stress corrosion cracking. Since 2205 lacks the copper addition of CD4MCuN, it would not be expected to do as well as CD4MCuN in sulfuric acid.

 

Mechanical:

 

Like all duplex stainless steels, 2205 has approximately twice the yield Properties strength of 316 stainless and it is also about 50% harder. In addition, it has a slightly higher modulus of elasticity than 316 S.S. which means it is stiffer, thus less deflection can be expected.

 

Specifications

 

The 2205 alloy is available in various product forms:

 

Bar ASTM A276 or A479 grade S31803

 

Castings ASTM A890 grade 4A

 

Tube ASTM A789

 

Pipe ASTM A790

 

Plate ASTM A240 Werkstoff-Nr. 1.4462 DIN X 2 CrNiMoN 22 5 3

 

Elements UNS 32205 UNS 31803
Mn 2.00 2.00
Si 1.0 1.0
P 0.03 0.03
S 0.02 0.02
C .030 Max .030 Max
N 0.08-0.20 0.14-0.20
Mo 2.50-3.50 3.00-3.50
Ni 4.50-6.50 4.50-6.50
Cr 21.0-23.0 22.0-23.0

 

Duplex Stainless Steel Applications:

 

Heat exchangers

 

 

Production and processing of oil and gas

 

Pressure vessels – tubes for processing of chemicals

 

Process industries involved with handling chloride bearing solutions

 

Shafts, rotors and hydraulic lines

 

Cargo tanks - piping for chemical tankers

 

Oil and gas production


Petrochemical


Water desalinization


Chemical


Pulp and Paper


Marine


Power

 

Seamless Duplex Stainless Steel heat exchanger u tube ASTM A789 UNS S31803 Grade 2205 OD15.88 X 2.11MM 0

Contact Details
Spezilla Tube Co., Ltd. (Shanghai)

Contact Person: Will Ma

Tel: +86 13918539222

Send your inquiry directly to us (0 / 3000)