Super Duplex S32760 (S32760)

What is Super Duplex S32760 and its applications?

Super Duplex S32760 is a nitrogen-alloyed duplex stainless steel containing chromium, nickel, molybdenum, tungsten and copper. It is used for highly stressed components in chloride-bearing process fluids, including offshore, seawater and chemical-handling equipment.

Oil and gas equipment: Valve and pump components exposed to corrosive process fluids.
Seawater handling: Cooling and desalination equipment requiring resistance to localized corrosion.
Chemical processing: Salt evaporation and process systems where both fluid chemistry and mechanical loads matter.

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Engineering Application & Selection Guide

S32760 combines a ferrite-austenite structure with substantial chromium, molybdenum and nitrogen additions. Its tungsten and copper distinguish its chemistry from S32750; the UNS designations are not interchangeable purchase descriptions.

S32760 hex bolts — For pump and valve joints, identify whether the fastener is process-wetted, externally exposed or isolated from the fluid.
S32760 stud bolts — State the operating fluid, maximum metal temperature and project inspection requirements for pressure-joint review.
S32760 socket head cap screws — For recessed heads, show access for tightening and inspection, and consider whether the recess can retain seawater.

Use the S32760 and 2507 material comparison to check chemistry and condition-specific data. Similar room-temperature strength is insufficient grounds for substitution. Sour-service acceptance, where required, depends on the applicable standard, material condition and environmental limits.

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Super Duplex S32760 Composition

Composition limits · wt.%

ElementWeight %

Cr: 24–26%
Ni: 6–8%
Mo: 3–4%
N: 0.20–0.30%
Cu: 0.50–1.0%
W: 0.50–1.0%
C: ≤0.03%
Mn: ≤1.0%
P: ≤0.03%
S: ≤0.010%
Si: ≤1.0%

ASTM / ASME specifications by product form

Finished-product requirements

Specify the finished-fastener mechanical requirements, condition and inspection separately from the starting-stock specification.

Super Duplex S32760 hex bolt requirements ↗

Fasteners · dimensional references

Product	Reference
Hex bolts	ISO 4014 / ISO 4017 · ASME B18.2.1
Threaded studs	DIN 976-1 · ASME B18.31.2
Hex nuts	ISO 4032 · ASME B18.2.2
Socket head screws	ISO 4762 · ASME B18.3
Flat washers	ISO 7089 / ISO 7090 · ASME B18.21.1
Custom fasteners	Customer drawing

Raw-material specifications

Product form / scope	Reference
Bar & shapes · Specify grade, condition and order requirements.	ASTM A276
Plate, sheet & strip	ASTM A240

Dimensions do not define material or finished-part compliance. Specify the grade, condition and applicable requirements.

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Super Duplex S32760 Mechanical Properties

Reference sample and condition

Data basis: Catalogue reference minimums
Gauge length: A5, as labelled in supplied table

Key properties	Value
Tensile strength	≥750 MPa
0.2% yield strength	≥550 MPa
Elongation	≥25%

Supplied technical reference · Scanned PDF page 1 · printed page 13

Procurement and application guide

Specify the material and final condition

Specify S32760 explicitly; it is a separate grade from S32750.

Material forms in the technical reference: Bar · Shapes · Plate · Sheet · Strip · Coil.

Define the finished-part acceptance

Include the material or bolting specification, required final condition, dimensions and quantity. State the service medium, temperature and loading where known. Agree the required tests, inspection coverage and acceptance criteria for the finished part.

Start with the information you have

Send a drawing or share the product form and dimensions. Identify any undecided requirements for review rather than copying a typical property value into the purchase order.

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