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Super Duplex Steel S32760 Fasteners are high-performance fastening components engineered for extreme corrosion environments, particularly where chloride exposure, seawater immersion, and high mechanical stress coexist. Manufactured from a duplex microstructure of austenite and ferrite, these fasteners deliver superior tensile strength and exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking as per ASTM A479, ASTM A182, and relevant ISO standards.
These fasteners are widely used in offshore oil & gas platforms, desalination plants, chemical processing units, and marine engineering structures where conventional stainless steel grades like 304 or 316 fail under aggressive conditions. Their balanced chemistry, including chromium, molybdenum, and nitrogen, ensures long-term structural stability under dynamic and high-load conditions.
KK Fasteners supplies Super Duplex Steel S32760 Fasteners to global EPC contractors and industrial OEMs, ensuring full material traceability, compliance documentation, and precision manufacturing for mission-critical applications across international projects.
| Parameter | Specification |
|---|---|
| Material Grade | Super Duplex Stainless Steel UNS S32760 (Zeron 100) |
| Standards | ASTM A182, ASTM A479, DIN, ISO, BS, ASME |
| Fastener Types | Bolts, Nuts, Screws, Washers, Stud Bolts, Threaded Rods |
| Size Range | M6 to M100 / 1/4" to 4" |
| Thread Type | Metric (M), UNC, UNF, BSW, Custom Threads |
| Hardness | Max 32 HRC (typical) |
| Tensile Strength | 750–900 MPa (approx.) |
| Yield Strength | ≥ 550 MPa |
| Surface Finish | Black, Polished, Passivated, PTFE Coated, Zinc Plated (custom) |
| Type Variants | Hex Bolt, Socket Head, Stud Bolt, Heavy Hex, Anchor Fasteners |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
|
Super Duplex S32760 |
0.05 max |
1.00 max |
1.00 max |
0.030 max |
0.010 max |
24.00 – 26.00 |
3.00 – 4.00 |
6.00 – 8.00 |
0.20 – 0.30 |
57.61 min |
| Grade | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) | Elongation |
|---|---|---|---|---|---|
|
S32760 |
7.8 |
0.281 |
1350 |
2460 |
15% – 25%.
|
| STANDARD | WERKSTOFF NR. | UNS |
|---|---|---|
|
Super Duplex 2507
|
1.4410 |
S32760 |
All measurements in millimeters
NOMINAL SIZE (D) |
BODY DIAMETER |
BOLT HEAD THICKNESS |
ACROSS THE FLATS |
ACROSS CORNERS |
||||
|---|---|---|---|---|---|---|---|---|
D (MAX) |
D (MIN) |
H (MAX) |
H (MIN) |
F (MAX) |
F (MIN) |
C (MAX) |
C (MIN) |
|
m10 |
10.00 |
9.78 |
6.63 |
6.17 |
17.00 |
15.73 |
18.48 |
17.77 |
m12 |
12.00 |
11.73 |
7.76 |
4.24 |
19.00 |
17.73 |
20.78 |
20.03 |
m14 |
14.00 |
13.73 |
9.09 |
8.51 |
22.00 |
20.67 |
24.25 |
23.35 |
m16 |
16.00 |
15.73 |
10.32 |
9.68 |
24.00 |
23.67 |
27.71 |
26.75 |
m20 |
20.00 |
19.67 |
12.88 |
12.12 |
30.00 |
29.16 |
34.64 |
32.95 |
m24 |
24.00 |
23.67 |
15.44 |
14.56 |
36.00 |
35.00 |
41.57 |
39.55 |
m30 |
30.00 |
29.67 |
19.48 |
17.92 |
46.00 |
45.00 |
53.12 |
50.85 |
m36 |
36.00 |
35.61 |
23.38 |
21.63 |
55.00 |
53.80 |
63.51 |
60.79 |
m42 |
42.00 |
41.38 |
26.97 |
25.03 |
65.00 |
62.90 |
75.06 |
71.71 |
m48 |
48.00 |
47.38 |
31.07 |
28.93 |
75.00 |
72.60 |
86.60 |
82.76 |
m56 |
56.00 |
55.26 |
36.2 |
33.80 |
85.00 |
82.20 |
98.15 |
93.71 |
m64 |
64.00 |
63.26 |
41.32 |
38.68 |
95.00 |
91.80 |
109.70 |
104.65 |
m72 |
72.00 |
71.26 |
46.45 |
43.55 |
105.00 |
101.40 |
121.24 |
115.60 |
m80 |
80.00 |
79.26 |
51.58 |
48.42 |
115.00 |
111.00 |
132.72 |
126.54 |
m90 |
90.00 |
89.13 |
57.74 |
54.26 |
130.00 |
125.50 |
150.11 |
143.07 |
m100 |
90.00 |
99.13 |
63.9 |
60.10 |
145.00 |
140.00 |
167.43 |
159.60 |
Super Duplex Steel S32760 Fasteners are used in industries where corrosion resistance and structural reliability are mission-critical under extreme environmental exposure.
Super Duplex Steel S32760 Fasteners are manufactured through controlled hot forging and precision CNC machining to maintain grain structure integrity and dimensional accuracy. Each production stage includes heat treatment optimization to achieve the required duplex balance.
Quality assurance involves hardness testing, tensile testing, and spectrochemical analysis to verify material composition. Surface integrity is inspected to ensure corrosion resistance performance in chloride-rich environments.
KK Fasteners implements ISO 9001:2015-compliant inspection protocols, ensuring full batch traceability and documentation. Every shipment undergoes final dimensional verification and marking validation before dispatch to global clients.
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Super Duplex Steel S32760 Fasteners are high-strength fastening components made from UNS S32760 duplex stainless steel. They combine austenitic and ferritic phases, offering excellent resistance to chloride-induced corrosion, pitting, and stress corrosion cracking, making them ideal for offshore, marine, and chemical processing environments.
S32760 fasteners provide significantly higher tensile strength and much better resistance to seawater and chloride corrosion compared to SS 316. While SS 316 is suitable for mild corrosive environments, S32760 is designed for extreme offshore, desalination, and chemical exposure conditions.
These fasteners are commonly manufactured in compliance with ASTM A182, ASTM A479, ISO, DIN, and ASME standards. These specifications ensure consistent mechanical performance, chemical composition control, and suitability for high-pressure and structural applications.
Selection depends on environmental exposure, load conditions, and corrosion risk. S32760 is preferred for highly aggressive chloride-rich environments such as offshore platforms and seawater systems. For less severe conditions, lower duplex grades may be considered for cost efficiency.
A reliable supplier should offer ISO-certified production, full material traceability, compliance with ASTM/ISO standards, and proven export experience. KK Fasteners supplies globally with certified documentation and consistent quality control for critical industrial applications.
Super Duplex Steel S32760 Fasteners are engineered for environments where failure is not an option, combining strength, corrosion resistance, and long-term stability in a single solution. KK Fasteners supports global engineering projects with precision-manufactured fasteners backed by full traceability and technical documentation.
For technical specifications, pricing, or custom requirements, contact KK Fasteners to request a detailed quotation or engineering datasheet for your application.
