+86-0577 56666518 info@tinsi-steel.cn
Language: 
∷ 
∷ ∷ 
Duplex steel tubes pipes super Duplex stainless Steel seamless tubing piping
Key words
Duplex tubes pipes,Duplex Steel tubes pipes, Duplex Steel tubing piping, super duplex Steel tubes pipes, Duplex Stainless Steel tubes pipes,Duplex Steel Industrial Welded tubes pipes, Duplex Steel seamless tubes pipes , Duplex Stainless Steel seamless tubes pipes,Duplex Steel capillary,Duplex stainless Steel capillary, Duplex Stainless steel BA tubes pipes,Duplex steel BA tube pipes,Duplex steel sanitary tubes pipes,Duplex steel precision tube pipes,Duplex Steel bright annealing tubes pipes, Duplex Steel capillary, ASTM A632 standard Duplex Steel capillary tubing, ASTM A789 A790 standard stainless steel Duplex Steel tubes tubing ,ASME SA789 790 Duplex Steel Stainless Steel Pipe piping,
TINSI duplex steel tubes pipes:
TINSI-STEEL company professional supply of Duplex stainless and Super Duplex stainless steel seamless pipes&tubes and welded pipes&tubes (Duplex steel industrial tubes&pipes,Duplex steel BA sanitary tubes&pipes,Duplex steel precision tubes&pipes,Duplex steel capillary) , and a large ready stock about 200tons available in common materials like Duplex stainless 2205 (UNS32205),2507(UNS32750), Z100(UNS32760).our expert team focusing on pipes/tubes more than 20 years,and start Duplex stainless steel about 5years,firm production and sell control all by self in stainless steel pipes&pipes that could provide competitive prices&quality.
TINSI-STEEL offered Table lists the chemistries and UNS numbers of various common DSS, including some first generation DSS for comparison. Note that UNS S32205 is a “newer version” of UNS S31803 and is produced with higher nitrogen, chromium, and molybdenum contents.
Introduce:
Super Duplex Tubing are mainly used in seawater environment, petrochemical industry, chemical fertilizer industry, petroleum refining industry, petroleum and gas industry, light industry, pulp industry, energy and environment protection industry.
The first-generation duplex stainless steel were developed more than 70 years ago in Sweden for use in the sulfite paper industry. Duplex alloy were originally created to combat corrosion problem caused by chloride-bearing cooling water and other aggressive chemical process fluid. Called duplex because of its mixed microstructure with about equal proportion of ferritic and austenitic. Duplex steel are a family of grade, which corrosion performance depending on their alloy content.
The term "Super-Duplex" was first used in the 1980's to denote highly alloyed, high-performance Super Duplex Pipe with a pitting resistance equivalent of >40 (based on Cr% + 3.3Mo% + 16N%). With its high level of chromium, Super duplex steel provides outstanding resistance to acids, acid chlorides, caustic solutions and other environments in the chemical / petrochemical, pulp and paper industries, often replacing 300 series stainless steel, high nickel super-austenitic steel and nickel based alloys.
The chemical composition of Super Duplex Tubing based on high contents of chromium, nickel and molybdenum improves intergranular and pitting corrosion resistance. Additions of nitrogen promote structural hardening by interstitial solid solution mechanism, which raises the yield strength and ultimate strength values without impairing toughness. Moreover, the two-phase microstructure guarantees higher resistance to pitting and stress corrosion cracking in comparison with conventiona stainless steel. From the introduction of its first-generation, Duplex steel has seen a steady increase in popularity.
The various Alloys Super-Duplex falls under the Duplex stainless steel grouping. Duplex stainless steel are graded for their corrosion performance depending on their alloy content. Today, modern Duplex stainless steel can be divided into four groups:
1.Lean Duplex such as 2304, which contains no deliberate Mo addition;
2.2205, the work-horse grade accounting for more than 80% of duplex usage;
3.25 Cr duplex such as Alloy 255 and DP-3;
4.Super-Duplex; with 25-26 Cr and increased Mo and N compared with 25 Cr grades, including grades such as 2507, Zeron 100, UR 52N+, and DP-3W
Table1. Type of Super Duplex Stainless Steel of TINSI-STEEL
|
China GB |
ISO Unified Digital Code |
ASTM / ASME |
UNS code |
EN Code |
Company Commercial Grade |
|
022Cr23Ni4MoCuN |
S23043 |
S32304 |
S32304 |
1.4362 |
SAF2304 (Sandvik) |
|
022Cr22Ni5Mo3N |
S22253 |
S31803 |
S31803 |
1.4462 |
- |
|
022Cr23Ni5Mo3N |
S22053 |
S32205 |
S32205 |
1.4462 |
SAF2205 (Sandvik) |
|
022Cr25Ni7Mo4N |
S25073 |
S32750 |
S32750 |
1.441 |
SAF2507(Sandvik) |
|
03Cr25Ni6Mo3Cu2N |
S25554 |
S32550 |
S32550 |
1.4507 |
UR52+ |
|
022Cr25Ni7Mo4WCuN |
S27603 |
S32760 |
S32760 |
1.4501 |
Zeron100 |
|
00Cr27Ni7Mo5N |
- |
S32707 |
S32707 |
- |
SAF2707(Sandvik) |
Table2.Chemical composition of Duplex Stainless Steel covered in ASTM specifications for pipe&tube,plate, sheet,bar.
|
UNS Number |
Typeb |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
Mo |
N |
Cu |
Other |
|
S31200 |
... |
0.030 |
2.00 |
0.045 |
0.030 |
1.00 |
24.0-26.0 |
5.5-6.5 |
1.20-2.00 |
0.14-0.20 |
... |
... |
|
S31260 |
... |
0.03 |
1.00 |
0.030 |
0.030 |
0.75 |
24.0-26.0 |
5.5-7.5 |
2.5-3.5 |
0.10-0.20 |
0.20-0.80 |
W0.10-0.20 |
|
S31803 |
... |
0.030 |
2.00 |
0.030 |
0.020 |
1.00 |
21.0-23.0 |
4.5-6.5 |
2.5-3.5 |
0.08-0.20 |
... |
|
|
S32001 |
... |
0.030 |
4.0-6.0 |
0.040 |
0.030 |
1.00 |
22.0-23.0 |
1.00-3.00 |
0.60 |
0.05-0.17 |
1.00 |
|
|
S32205 |
2205 |
0.030 |
2.00 |
0.030 |
0.020 |
1.00 |
19.5-21.5 |
4.5-6.5 |
3.0-3.5 |
0.14-0.20 |
... |
|
|
S32304 |
2304 |
0.030 |
2.50 |
0.040 |
0.030 |
1.00 |
21.5-24.5 |
3.0-5.5 |
0.05-0.60 |
0.05-0.20 |
0.05-0.60 |
|
|
S32520 |
... |
0.030 |
1.50 |
0.035 |
0.020 |
0.80 |
24.0-26.0 |
5.5-8.0 |
3.0-4.0 |
0.20-0.35 |
0.50-2.00 |
|
|
S32550 |
255 |
0.04 |
1.50 |
0.040 |
0.030 |
1.00 |
24.0-27.0 |
4.5-6.5 |
2.9-3.9 |
0.10-0.25 |
1.5-2.5 |
|
|
S32750 |
2507 |
0.030 |
1.20 |
0.035 |
0.020 |
0.80 |
24.0-26.0 |
6.0-8.0 |
3.0-5.0 |
0.24-0.32 |
0.50 |
|
|
S32760 |
... |
0.030 |
1.00 |
0.030 |
0.010 |
1.00 |
24.0-26.0 |
6.0-8.0 |
3.0-4.0 |
0.20-0.30 |
0.50-1.00 |
c |
|
S32900 |
329d |
0.06 |
1.00 |
0.040 |
0.030 |
0.75 |
23.0-28.0 |
2.5-5.0 |
1.0-2.0 |
... |
... |
|
|
S32950 |
... |
0.03 |
2.00 |
0.035 |
|
|
|
|
|
|
|
|
a Weight percent, maximum unless otherwise noted.
b Unless otherwise indicated, a common name, not a trademark, widely used, not associated with any one producer, as listed in ASTM A 240.
c W 0.50-1.00; Cr+3.3Mo+16N=40 min.
d AISI designation
Duplex steel tubes pipes Benefits:
High strength,
High resistance to pitting, crevice corrosion resistance.
High resistance to stress corrosion cracking, corrosion fatigue and erosion,
Excellent resistance to chloride stress-corrosion cracking
High thermal conductivity
Low coefficient of thermal expansion
Good sulfide stress corrosion resistance,
Low thermal expansion and higher heat conductivity than austenitic steels,
Good workability and weldability,
High energy absorption.
Super Duplex Tubing Applications
Heat exchanger tubes and pipes for production and handling of gas and oil,
<
Contact: Hyman.C
Phone: 15825401620
Tel: +86-0577 56666518
Email: info@tinsi-steel.cn
Add: factory address: no272,Yongning West Road,Xiping Street, Songyang,Li shui,China
LiveChatclose
Send Email
tinsi-steel
WhatsApp