We supply high quality S32760 stud bolts, S32760 threaded rod, S32760  threaded bar, S32760 double ends stud bolt in full thread or parital thread. Our standards/specifications covers ASTM, ASME, DIN, ISO. Such as DIN975, DIN976, DIN938,  DIN939, ASME/AISI 18.2.1 etc. We can also manufacture all shapes of non-standard hastelloy stud bolts according to customers’ drawing.

Super Duplex UNS S32760 is among the most common super duplex grade in the market. UNS S32760 is a duplex stainless steel especially designed for service in aggressive chloride-containing environments and has additions of W and Cu compared to UNS S32750

Alloy 32760 is a Super Duplex Stainless Steel supplied primarily in the solution annealed condition, but can also be cold worked to achieve the mechanical properties of A193 B7, with additional Impact Testing at -46°C for FG Grade.  As a super duplex stainless steel, it combines the desirable aspects of both austenitic and ferritic grades. The higher chromium, molybdenum and nitrogen contents result in a Pitting Resistance Equivalent number (PREN) of >40, providing pitting and crevice corrosion resistance superior to austenitic and duplex stainless steels in almost all corrosive media, and a Critical Pitting Temperature exceeding 50°C   nb. versions of the PREN formula also include W as a positive influence on overall pitting resistance.

UNS S32760 combines outstanding corrosion resistance in marine atmospheres and a broad range of oil & gas application environments,It provides higher strength than both austenitic and 22% Cr duplex stainless steels, and is listed in NACE MR 0175 for sour service and ASME for pressure vessel applications.  Variants of the materials are used in Oil & Gas applications, Pump & Valve, Power Generation, Chemical Processing, Desalination Plants.

The diameter of bolts ranges from M6-M80 in Metric and 5/16” to 3 1/2” in Inch, and length can be up to 1000mm or 12 feet.  ASTM A1082 UNS S32760 stud bolts and nuts 

Super Duplex UNS-S32760-A182-F55, Super Duplex Alloy UNS S32760 (F55 / 1.4501) has excellent resistance Pitting and Crevice Corrosion in seawater at elevated temperatures, supplied with a PREN 40<( Pitting Resistance Eqv) . Excellent resistance to SCC ( Stress Corrosion Cracking) in Sour and Chloride environments .

Providing higher strengths than both austenitic and 22% Cr Duplex Stainless Steels UNS S32760 (F55) is suited to a variety of applications in industries such as Oil & Gas, CPI(Chemical Processing Industries), and Marine environments.

UNS S32760 Stud bolt Properties Grade FG

​The base material for super duplex stud bolts to grade FG (Fastener Grade) is produced and tested in the exact same way as for grade FLT with the only difference that the Charpy V Notch testing is performed at -46 °C. The mechanical properties of grade FG is also identical to those of grade FLT.

​Grade SA

​The base material for grade SA has also been solution annealed at 1120°C followed by quenching in water but with no subsequent strain hardening. This results in a lower strength compared to both grade FLT and grade FG. Charpy V Notch testing is performed at -46°C

Mechanical properties for Grade SA Stud Bolts:

• Tensile strength min. 800 MPa
• Yield Strength (0,2% offset) min. 550 MPa
• Elongation in 2″ (50mm) or 4D min. 25%
• Reduction of area min. 50%
• Brinell Hardness max. 290

Heavy Hex Nuts – Grade SA

The Heavy Hex Nuts supplied with the super duplex stud bolts are produced from ASTM A276 UNS S32760 Condition A (Solution Annealed) material. The nuts are produced by drop forging followed by solution annealing at 1120°C and water quenching. The thread is produced by machining – UNC (Unified Coarse Thread to ASME B1.1) thread for nuts up to 1″ and UN8 (Unified 8 Thread to ASME B1.1) thread for nuts larger then 1″. Grade SA heavy hex nuts are used for all 3 grades of stud bolts FLT, FG and SA.

We can also make the Xylan PTFE coating on the UNS S32760 stud bolt & hex nuts.

Xylan 1424 coated  UNS S32760 stud bolt & UNS S32760 hex nuts

Xylan 1070 coated  UNS S32760 stud bolt & UNS S32760 hex nuts

Xylan 1014 coated  UNS S32760 stud bolt & UNS S32760 hex nuts

Xylan 1014 coated  Zeron 100 FG stud bolt,Gray color