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Super Duplex Tube

Super duplex tube

What is a super duplex tube?

These components are produced by alloying iron, chromium, nickel, and molybdenum. A super duplex tube has ferritic and austenitic grades in 50-50% proportions. This microstructure makes it corrosion-resistant and appropriate for temperatures up to 600° f.


What is a super duplex seamless tube used for?

The most frequent uses of a SDSS seamless tube are chemical processing, desalination, hydraulic lines, and gas cleaning. Since this tubing has high thermal conductivity, it works well in heat exchangers.Super duplex condenser tubes get coveted for their low thermal expansion and ability to withstand stressful environments.

Supplier of SDSS Seamless Tubing in India, Check Specification Table for Detail Information

Super Duplex Tube Specification


Super duplex tube specification

SDSS Seamless Tubing Delivery Schedules


Country Name Colombia Bolivia Brazil Argentina Chile
Delivery Time 12 weeks

Get Super Duplex Stainless Steel Welded Tube in Bright Annealed, 400 /180 grit, Mirror and Matt Finish at Low Cost

Super Duplex Stainless Steel Welded Tube Dimensional Tolerance


OD 0.500”–1.500” excl ≤ .500”
OD Tolerance ± .005” ± .005”
Wall Tolerance ± 10% ± 15%

How does super duplex stainless steel tubing perform in corrosive environments?

The top-class performance in corrosive atmospheres is the most significant benefit of zeron 100 UNS S32760 square tubing. It resists crevice corrosion, pitting, and stress corrosion cracking (scc) when exposed to chlorides, acids, etc. A UNS S32750 ERW tube has a pren (pitting resistance equivalent number) over 40.

Types of SDSS Tubes


Super duplex tubing

Super duplex tubing

Super duplex seamless tube

Super duplex seamless tube

Super duplex welded tube

Super duplex welded tube

Super duplex stainless steel ERW tube

Super duplex stainless steel ERW tube

Find Super Duplex Steel Redrawn tube in SCH 5/ 5S to SCH 160 Thickness, Check Pressure Ratings

Super Duplex Alloy Annealed Tube Pressure Ratings


Tube OD(inch) 1/4 3/8 1/2 5/8 3/4 1➂  
Nominal Wall Thickness in. 0.049 0.049 0.065⑤ 0.065 0.065 0.083⑤ 0.095⑤ 0.083 0.083 0.083 0.095⑤ 0.095 0.109 0.109⑤ 0.134 0.12 0.035
Ordering Number 2507-T4-S-049-20 2507-T6-S-049-20 2507-T4-S-065-20 2507-T6-S-065-20 2507-T8-S-065-20 2507-T6-S-083-20 2507-T8-S-095-20 2507-T8-S-083-20 2507-T10-S-083-20 2507-T12-S-083-20 2507-T10-S-095-20 2507-T12-S-095-20 2507-T16-S-109-20 2507-T12-S-109-20 2507-T16-S-134-20 2507-T16-S-120-20 2507-T4-S-035-20
Nominal Length ft (m) 20 (6.1)                                
Weight lb/ft (kg/m) 0.10 (0.15) 0.17 (0.25) 0.13 (0.19) 0.21 (0.31) 0.30 (0.45) 0.26 (0.39) 0.41 (0.61) 0.36 (0.54) 0.48 (0.71) 0.58 (0.86) 0.53 (0.79) 0.66 (0.98) 1.02 (1.52) 0.74 (1.10) 1.20 (1.80) 1.12 (1.67) 0.08 (0.12)
ASME B31.3 Chapter IX Pressure Rating psig (bar) 22 600 (1557)① 14 400 (992)① 30 200 (2080) 18 300 (1260) 14 400 (992)① 24 700 (1701) 22 500 (1550)① 18 600 (1281) 14 400 (992) 12 000 (826)① 17 400 (1198)① 14 300 (985)① 11 500 (792) 16 000 (1102) 15 000 (1034)① 12 800 (881) 14 100 (971)
ASME B31.3 15 000 (1040)① 10 100 (700)① 19 800 (1370) 12 700 (880) 10 100 (700)① 16 800 (1160) 15 300 (1060)① 12 900 (890) 10 100 (700) 8 500 (590)① 12 100 (840)① 10 000 (690)① 8 100 (560) 11 100 (770) 10 000 (690)① 9 100 (630) 10 000 (690)

What are the benefits of using igc testing for sdss heat exchanger tubes?

Igc testing, or an intergranular corrosion test, judges the corrosion resistance of super duplex heat exchanger tubes. It ensures the components follow the stringent quality standards required for heat-based applications (high temperature and pressure). Other related tests include cpt testing (pitting temperature), charpy impact testing, and microstructure evaluations.

Get Super Duplex Alloy Annealed Tube Size Ranging From 6” to 24”, View Size Chart

SS Super Duplex Tubing Size


Wall Sizes ( O.D.)
0.020 1/16", 3/16", 1/8" , 5/16", 1/4" , 3/8"
0.010 1/16", 3/16", 1/8"
0.016 3/16", 1/8"
0.012 1/8"
0.028 1/8", 1/4", 3/16" , 3/8", 5/16" , 3/4" , 1/2" , 1 1/2", 1" , 2"
0.049 3/16" , 1/4" , 5/16", 1/2", 3/8" , 5/8", 16" , 7/8", 3/4" , 1 1/8", 1" , 1 1/2", 1 1/4" , 2", 1 5/8" , 2 1/4",
0.035 1/8" , 1/4", 3/16", 3/8", 5/16" , 1/2", 7/16" , 5/8", 16" , 7/8", 3/4" , 1 1/4", 1" , 1 5/8", 1 1/2" , 2 1/4", 2"
0.065 1/4", 3/8", 5/16" , , 1/2" , 16" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 1 5/8" , 1 3/4" , 2" , 2 1/2" , 3"
0.095 1/2", 1", 5/8" , 1 1/2", 1 1/4" , 2"
0.083 1/4", 1/2", 3/8" , 3/4", 5/8" , 1", 7/8" , 1 1/2", 1 1/4" , 1 7/8", 1 5/8" , 2", 3", 2 1/2"
0.109 1/2" , 1", 3/4" , 1 1/2", 1 1/4" , 2"
0.125 3/4", 1 1/2, 1", 3 1/4", 1 1/4"", 2" , 3" ,
0.120 1/2" , 3/4", 5/8" , 1", 7/8" , 1 1/2", 1 1/4" , 2 1/4", 2" , 3", 2 1/2" ,
0.134 1"
0.375 3 1/2"
0.250 3"

What is the unique composition that improves resistance to pitting in super duplex welded tubes?

The most striking property of super duplex welded tubes is brilliant pitting resistance. They also resist crevice erosion amid exposure to sulphides and chlorides. This property stems from its microstructure,comprising ferrite and austenitic grades. Super duplex tubing contains high amounts of chromium and nickel (25%, 7%) andadditives of molybdenum and nitrogen.

Mechanical Properties of Super Duplex Welded Tube


Grade Density Melting point Yield strength(0.2% offset) Tensile strength Elongation
S32750/S32760 7.8g/cm3 1350°C(2460°F) PSi-80000, MPa-550 PSi-116000, MPa-800 15%
Check SS Super Duplex Coiled Tubing Chemical Composition and Equivalent Properties

SDSS Seamless Tube Chemical Composition


Grade C N P Si Mn Mo Ni Cr S Other
S32750/S32760 0.030 0.24/0.32 0.035 0.80 1.20 3.0/5.0 6.00/8.00 24.0/26.0 0.020 Cu:0.50


What is the lead time for delivery of super duplex seamless tubes with different sizes, grades, and finishes?

Super duplex seamless tubing gets manufactured via cold drawing. It is the best choice for applications requiring ultra-high precision. The delivery lead time depends on the complexity of the finishes requested by the customer. For example, processes such as cutting, pickling, and dispatching an sdss annealed tube will be faster than performing a mirror finish; the latter involves greater effort. The dimensions affect the time too, particularly if non-standard.

Super duplex stainless steel tubing is available as grade2507 and grade 4501, which includes tungsten for resistance against chlorides.

Equivalent Grade of Super Duplex Steel ERW tube


STANDARD WERKSTOFF NR. UNS
Super duplex 1.4410 S32750/S32760