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Astm A789 Uns S32750 Uns S31803 Pipe Duplex Stainless Steel Pipe Supplier

Astm A789 Uns S32750 Uns S31803 Pipe Duplex Stainless Steel Pipe Supplier

Astm A789 Uns S32750 Uns S31803 Pipe Duplex Stainless Steel Pipe Supplier

Product Details:

Place of Origin: China
Brand Name: Torich
Certification: ISO9001,ISO14001,TS16949
Model Number: ASME A789

Payment & Shipping Terms:

Minimum Order Quantity: 0.5 tons
Price: negotiable
Packaging Details: In bundles
Delivery Time: 5-8 weeks days
Payment Terms: L/C, T/T
Supply Ability: 5000tons per year
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Detailed Product Description
Material: Super Duplex 2507 Standard: ASME A789
Surface: Annealed & Pickled Length: 12000mm Max
Delivery Time: 30-40days End: Plain

Astm A789 Uns S32750 Uns S31803 Pipe Duplex Stainless Steel Pipe Supplier


The duplex material is a kind of ferrite - austenitic duplex stainless steel,which is integrated conducive properties both of ferrite and austenitic and provided with higher intensity as well as tenacity.


Duplex 2507 (UNS S32750) is a super duplex stainless steel designed for applications which require exceptional strength and corrosion resistance. 2507 is a 25% chromium, 4% molybdenum, and 7% nickel alloy resulting in excellent resistance to chloride pitting and crevice corrosion attack. The duplex structure provides 2507 with exceptional resistance to pitting and chloride stress corrosion cracking.



It can also be used for pressure control of surface safety valves and other surface valves, and various connection tubelines of large-scale equipment instrumentation control systems for oil and gas field drilling and oil production.




UNS Chemical , %
  C Mn P S Si Ni Cr Mo N
S31803 0.030MAX 2.00MAX 0.030MAX 0.020MAX 1.00MAX 4.5-6.5 21-23 2.5-3.5 0.08-0.20
S32205 0.030MAX 2.00MAX 0.030MAX 0.020MAX 1.00MAX 4.5-6.5 22-23 3.0-3.5 0.14-0.20
S32750 0.030MAX 1.20MAX 0.035MAX 0.020MAX 0.80MAX 6.0-8.0 24-26 3.0-5.0 0.24-0.32
S32760 0.030MAX 1.00MAX 0.030MAX 0.010MAX 1.00MAX 6.0-8.0 24-26 3.0-4.0 0.20-0.30




Size Chart

OD Wall
Materials Standard Working Pressure
1/8" 0.02,0.028,0.035 Austenitic steel 304L (UNS S30403)
Austenitic steel 316L (UNS S31603)
Duplex 2205 (UNS S32205 & S31803)
Super Duplex 2507 (UNS S32750)
Incoloy 825 (UNS N08825)
Inconel 625 (UNS N06625)
ASTM-A 269
ASTM-A 632
ASTM-A 789
ASTM-B 704
60-120 Mpa Customized
3/16" 0.02,0.028,0.035,0.049
1/4" 0.02,0.028,0.035,0.049,
* OD: Up to 1 inch


Chemical Composition

Chemical Composition,%
Standard ASTM A269 ASTM A789 ASTM B704
Material SS 304 SS 304L SS 316 SS 316L Duplex 2205 Super Duplex 2507 Incoloy 625 Incoloy 825
UNS S30400 S30403 S31600 S31603 S32205 S32750 N06625 N08825
C 0.08 0.035 0.08 0.035 0.03 0.03 0.1 0.05
Mn 2 2 2 2 2 1.2 0.5 1
P 0.045 0.045 0.045 0.045 0.03 0.035 0.015 ...
S 0.03 0.03 0.03 0.03 0.02 0.02 0.015 0.03
Si 1 1 1 1 1 0.8 0.5 0.5
Ni 8.0-11.0 8.0-12.0 10.0-14.0 10.0-15.0 4.5-6.5 6.0-8.0 min 58.0 38.0-46.0
Cr 18.0-20.0 18.0-20.0 16.0-18.0 16.0-18.0 22.0-23.0 24.0-26.0 20.0-23.0 19.5-23.5
Mo ... ... 2.00-3.00 2.00-3.00 3.0-3.5 3.0-3.5 8.0-10.0 2.5-3.5
N ... ... ... ... 0.14-0.20 0.24-0.32 ... ...
Cu ... ... ... ... ... 0.5 ... 1.5-3.0
Fe             5 min 22.0
Al             0.4 0.2
Ti             0.4 0.6-1.2
Cb+Ta             3.15-4.15 ...


Who We are ?

-------A professional steel pipes materials inventor, manufacturer and solution provider

Torich International Co.,Ltd is a professional manufacturer and exporter of steel pipes materials. It is an international marketing and sales company specialized in steel tubes, which holds the factories of Seamless Steel Tubes with Carbon and Alloy Steel Grade, Welded Precision Steel Tubes,DOM Steel Tubes, Seamless & Welded Stainless Steel Tubes with Nickel and Alloy Steel Grade.
Our factory was established since 1997, with the name of Haiyan Sanxin Steel Pipe Co., Ltd. The factories’ technicians are of great engineering experience in steel pipe industry for more than 20 years, which are in great command of production technology for Cold Drawing and Cold Rolling. So we have strong technician team and manufacturing capability.



Our group including the following members:

A. Torich Internationa Co.,Ltd, in charge of marketing and contracting for sales.
B. Ningbo Timely Import & Export Co.,Ltd, in charge of import and export issues of our group,
also in charge of sourcing and purchasing service for customers in export businesses.
C. Haiyan Sanxin Steel Tube Co.,Ltd, in charge of production and engineering, is the technical support and production base of our group.



Torich Strength:

1. Torich is the STEEL TUBE MAKER company in China,playing a significant role in domestic market as well as international market.
2. Our products have exported to over 56 countries worldwide, winning a great fame among our customers.
3. There was no quality claim in the past 3 years.
4. First production was started since 1997, our boss worked in steel tube industry for over 10 years before started the own factory, factory engineers with over 30 years manufacturing experience, knowing well about production and inspection technology.
5. We have been exporting steel tubes since 10 years ago, and know well about international standard for steel tubes DIN/EN,ASTM,SAE,BS,GOST,JIS etc,also with great experience of International trading practices.
6. Our team take Timely action within 24 hours after receiving customers' first requirement and enquiry.
7. 100% prompt delivery in the past 3 years.
8. 100% dimensional check and 100% visual inspection on tube surfaces.
9. 100% eddy current test and ultrasonic test for detecting longitudinal and transversal defects.
10.Convenient tranportation: production location is 30 mins high speed train from Shanghai, 2 hours drive from Shanghai


Astm A789 Uns S32750 Uns S31803 Pipe Duplex Stainless Steel Pipe Supplier

Contact Details
Torich International Limited

Contact Person: Mr. Richard

Tel: 86-574-88086983

Fax: 86-574-88086983

Send your inquiry directly to us (0 / 3000)