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ASTM A790/ASME SA 790 UNS S32760 pipe

ASME SA790 UNS S32760 Pipes, Zeron® 100, which is also sold under the names Super Duplex Stainless and Super Duplex, is a highly alloyed stainless steel that is designed for use in difficult and aggressive environments, ASTM A790 UNS S32760 Seamless Pipes Manufacture.

Alloy Zeron 100/32760 Seamless Welded Pipes are made up of an alloy that has excellent resistance towards oxidation. The alloys comprise 7 percent nickel, 25 percent chromium, and 3.6 percent molybdenum. It also includes specific concentrations of zinc and tungsten in its chemical composition. These pipes consist of almost equal austenitic and ferric contents.

Duplex Steel Zeron 100 Seamless Welded Pipes have excellent resistance towards corrosion pitting and corrosion cracking. As it has a certain amount of molybdenum, chromium, along with tungsten in its alloy, it can act as a significant barrier against various organic acids. These also have nitrogen present in them, making them even more vital. These pipes are two times stronger than the stainless steel 300 pipes. There also is copper present in the alloy, which makes them resistant to sulfuric acid-bound environments. Therefore, these pipes are widely used in applications where problems related to sulfuric acids can occur. The other properties that these pipes have are weldability, durability, high tensile strength, corrosion resistance, etc.

Usage of this super duplex stainless steel is not recommended when it involves extended exposure to temperatures greater than 572° F. This exposure causes a substantial reduction in toughness. Notice the chemical composition of duplex 2507 and Zeron 100 are similar however; Zeron 100 contains slightly more copper and tungsten. The copper content (min. 0.5, max 1.0) permits excellent resistance to corrosion in many non-oxidizing and mineral acids like hydrochloric and sulfuric acid.

Alloy Zeron 100 pipes can be available in different shapes and sizes depending upon the need and requirements of the applications. These pipes are used in a large number of industries such as the chemical industry, the oil industry, paper, and pulp industries, sugar industries, etc. These are also used widely in marine and off the shore environments.


  • Guaranteed corrosion performance (PREn ≥ 40)
  • Excellent corrosion resistance in mineral acids such as hydrochloric and sulfuric
  • High resistance to pitting and crevice corrosion
  • Excellent resistance to stress corrosion cracking in both chloride and sour environments
  • High resistance to erosion corrosion and corrosion fatigue
  • Excellent mechanical properties

ASTM A790 UNS S32760 Pipe


  • Oil and gas industry applications
  • Pollution control
  • Pulp and paper
  • Power generation
  • Flue-gas desulfurization

Duplex Steel UNS S32760 Pipes Specification

Standard : ASTM A790 / ASME SA790

Size : 1/8" NB To 30" NB IN

Schedule : SCH20, SCH30, SCH40, STD, SCH80

Form : Round, Hydraulic Etc.

Length : Single Random, Double Random & Cut Length.

Form :Round, Hydraulic, etc.

Chemical Composition

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

Physical Properties

UNS No Grade Proof Stress
0.2% (MPa)
Tensile Strength
Hardness Max
S32760 2507 550 795 15 310 32*

Calico Metal Ind Pvt Ltd exports their products to Mumbai, Delhi, Bangalore, Ahmedabad, Chennai, Kolkata, Surat, Pune, Hydrabad, Lucknow, Bhopal, Jaipur, Visakhapatnam, Patna, Vadodara, Nagpur, Indore, Thane, Ranchi, Coimbatore, Aurangabad, Tamilnadu, Ludhiana, Dhanbad, Lucknow, Howrah, Raipur, Chandigarh, Guwahati, Bhubaneswar, Vietnam, South Africa, Kazakhstan & Saudi Arabia.

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Duplex Steel Materials