UNS S32760 is a super duplex grade with a ferritic-austenitic microstructure designed for service in aggressive chloride-containing environments and has additions of W and Cu compared to UNS S32750. It has good resistance to localized corrosion and stress corrosion cracking in combination, with high mechanical strength. The super duplex microstructure has the high strength of the ferritic grades whilst retaining the corrosion resistance of the austenitic grades. UNS S32760 also has outstanding resistance against sulphide-stress corrosion cracking in sour-gas environments, and high impact strength, even when welded, UNS S32760 presents only slightly lower impact strength.

UNS S32760 Chemical Composition

The chemical composition of S32760 contains 24-26% chromium, 6-8% nickel, and 3-4% molybdenum as well as copper, tungsten, and nitrogen alloy, UNS S32760 is a highly alloyed super duplex stainless steel with high PREN for use in aggressive environments.

UNS S32760 Mechanical Properties

UNS S32760 Physical Properties

UNS S32760 Equivalent

• EN 1.4501
• Grade F55
• (Zeron 100)

Forms

• ASTM A240 plate
• ASTM A479 UNS S32760 shapes
• ASTM A790 UNS S32760 pipe
• ASTM A182 F55 fitting
• ASTM A276 UNS S32760 bar
• ASTM A760 UNS S32760 Corrugated Steel Pipe
• ASTM A815 UNS S32760 pipe fitting

UNS S32760 Properties

• 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
• Possibility for weight reduction over austenitic, standard duplex and nickel base alloys
• Good weldability

Corrosion Resistance

Alloy S32760 provides excellent corrosion resistance and strength properties. In comparison with UNS S32205, SUS 329J3L, and SUS 329J4L (NAS 64), it offers superior localized corrosion resistance and thus is suitable for use in chemical plants, seawater desalination plants, and similar severe environments.

Welding

Various welding methods are applicable in the same manner as with the standard austenitic stainless steels, including shielded metal arc welding, TIG welding, and plasma welding. The use of welding electrodes for UNS S32760 is recommended. Preheating and post-heating are not necessary. In welding, the interpass temperature should be no more than 100℃ to prevent the formation of intermetallic compounds.

Heat Treatment

Duplex stainless steel cannot be hardened by heat treatment. They can however be work-hardened.

Solution treatment or annealing can be done by rapid cooling after heating to around 1100°C.

Disadvantages of UNS S32760

Firstly, the higher price of UNS S32760 is due to its exceptional properties such as superior corrosion resistance and high strength. This material is typically costly and not suitable for large-scale use in cost-sensitive applications.

Secondly, UNS S32760 contains a variety of alloying elements, such as molybdenum, which may lead to an elemental imbalance if its alloying composition is not reasonably adjusted, thus reducing its corrosion resistance. Therefore, special attention needs to be paid to the balance of alloying elements during use.

Finally, UNS S32760 is susceptible to localized corrosion in chloride-containing environments. Although it performs well in most environments, special care needs to be taken when using it in chloride environments to avoid localized corrosion.

1. who are we?
We are based in Jiangsu, China, start from 2005,sell to Domestic Market(50.00%),South America(20.00%),Eastern Europe(10.00%),Southeast Asia(10.00%),Southern Europe(5.00%),South Asia(5.00%). There are total about 101-200 people in our office.

2. how can we guarantee quality?
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3.what can you buy from us? Stainless steel,Carbon steel,Galvanized,PPGI,PPGL

4. why should you buy from us not from other suppliers?
Our company are specialized in steel field for over more than 15 years.