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Super Duplex Steel S32760 Bolts are engineered for extreme service environments where conventional stainless steels fail due to chloride-induced corrosion, pitting, and stress cracking. Manufactured from UNS S32760 (also known as Zeron 100 grade), these bolts combine a dual-phase austenitic-ferritic microstructure that delivers exceptional mechanical strength and superior corrosion resistance in aggressive media such as seawater, acidic chemicals, and high-salinity industrial environments.
These high-performance fasteners comply with international material benchmarks such as ASTM A276, ASTM A479, and NORSOK M-630 requirements, making them suitable for critical applications across offshore oil & gas platforms, petrochemical processing plants, desalination systems, and marine engineering structures. With high PREN values typically above 40, Super Duplex Steel S32760 Bolts provide long-term durability under both mechanical stress and chemical exposure.
KK Fasteners supplies these bolts to global EPC contractors and industrial buyers who require consistent metallurgical quality, full traceability, and dimensional precision for mission-critical assemblies.
| Parameter | Specification |
|---|---|
| Material Grade | Super Duplex Steel UNS S32760 (Zeron 100) |
| Standards | ASTM A276, ASTM A479, NORSOK M-630, EN 1.4501 |
| Size Range | M6 to M100 / 1/4" to 4" |
| Thread Type | Metric (ISO), UNC, UNF, BSW |
| Tensile Strength | 750 – 800 MPa (Minimum) |
| Yield Strength | ≥ 550 MPa |
| Hardness | Max 32 HRC |
| Surface Finish | Bright, Polished, Black Oxide, Passivated |
| Types | Hex Bolt, Stud Bolt, U-Bolt, Anchor Bolt |
| S32760 | C | N | P | Si | Mn | Mo | Ni | Cr | S | Other |
| 0.030 | 0.24/0.32 | 0.035 | 0.80 | 1.20 | 3.0/5.0 | 6.00/8.00 | 24.0/26.0 | 0.020 | Cu:0.50 |
| S32760 | Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80000 , MPa – 550 | Psi – 116000 , MPa – 800 | 15 % |
| STANDARD | UNS | WERKSTOFF NR. |
| Super Duplex S32760 | S32760 | 1.4410 |
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 Bolts are used in industries where corrosion resistance and structural integrity are non-negotiable. These bolts are essential for assemblies exposed to seawater, aggressive chemicals, and high-pressure environments.
Super Duplex Steel S32760 Bolts are manufactured through controlled hot forging and precision CNC machining processes to achieve consistent dimensional accuracy and mechanical integrity. Each production batch undergoes strict quality validation, including tensile testing, hardness measurement, and metallurgical structure verification.
Surface finishing processes ensure improved corrosion resistance and uniform coating adhesion where applicable. KK Fasteners implements full traceability systems aligned with ISO 9001:2015 standards, ensuring every bolt can be tracked back to its raw material heat number. Additional compliance checks are conducted for international project specifications such as NORSOK and ASTM standards, ensuring suitability for critical industrial applications.
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Super Duplex Steel S32760 Bolts are high-strength fasteners made from UNS S32760 alloy, designed for extreme corrosion resistance and mechanical durability. They are widely used in offshore, marine, and chemical industries where exposure to chlorides and harsh environments is common.
S32760 offers significantly higher chromium, molybdenum, and nitrogen content compared to 316 stainless steel, resulting in superior pitting resistance, higher tensile strength, and improved resistance to stress corrosion cracking in chloride environments.
These bolts typically conform to ASTM A276, ASTM A479, and NORSOK M-630 standards. These specifications ensure chemical composition control, mechanical strength, and suitability for critical industrial applications.
They are ideal for offshore platforms, desalination systems, chemical plants, marine structures, and power generation equipment where corrosion resistance and structural reliability are critical.
Look for manufacturers with ISO certification, material traceability, third-party testing, and proven export experience. KK Fasteners supplies globally with full documentation, ensuring compliance with international engineering standards.
Super Duplex Steel S32760 Bolts are engineered for environments where failure is not an option, offering unmatched strength and corrosion resistance. With precise manufacturing control and global supply capability, KK Fasteners supports critical industries with reliable fastening solutions tailored to demanding engineering applications.
For technical specifications, pricing, or custom requirements, connect with KK Fasteners to request a detailed quotation or engineering consultation today.
