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Hazlewood Fasteners, a well-respected manufacturer and supplier located in Canberra, Australia, specializes in ASTM A453 Grade 660 Class C Nuts designed for high-temperature and high-pressure applications. These nuts are crafted from austenitic stainless steel, enriched with nickel, chromium, and titanium, which gives them exceptional mechanical strength, oxidation resistance, and thermal stability. Perfect for tough environments like power plants, aerospace, and the petrochemical sector, ASTM A453 GR 660 Class C Nuts provide reliable and secure fastening even under extreme conditions. Hazlewood Fasteners follows stringent ASTM standards, ensuring precision engineering, consistent quality, and a long service life for critical industrial bolting systems.
ASTM A453 GR 660 Class C Nuts are made up of Nickel (24–27%), Chromium (13–16%), Titanium (1.9–2.35%), Manganese (≤2%), Silicon (≤1%), Carbon (≤0.10%), Phosphorus (≤0.04%), and Sulfur (≤0.03%), with Iron making up the rest. They boast a minimum tensile strength of 895 MPa and a yield strength of 585 MPa, while maintaining excellent creep and stress rupture resistance up to 700°C. The addition of titanium enhances structural stability, preventing carbide precipitation during high-temperature exposure, ensuring long-lasting mechanical integrity, and delivering dependable performance in varying thermal and pressure conditions.
Material | Dimensions | Standards | Size | Length |
ASTM A453 GR 660 CLASS C Nuts | ASME B18.2.1, B18.3 | ASTM, ASME | M 02 to M 160 | 3 mm to 200 mm |
|
Element |
Content |
|---|---|
|
Carbon |
0.08 max |
|
Manganese |
2.00 max |
|
Phosphorus, max |
0.040 max |
|
Sulfur, max |
0.030 max |
|
Silicon |
1.00 max |
|
Nickel |
24.0-27.0 |
|
Chromium |
13.5-16.0 |
|
Molybdenum |
1.00-1.50 |
|
Tungsten |
– |
|
Titanium |
1.9-2.35 |
|
Aluminum |
0.35 max |
|
Vanadium |
0.10-0.50 |
|
Boron |
0.001-0.010 |
| Tensile Strength/Ultimate Tensile Stress (UTS) – (Mpa) | 895 min |
| Yield Strength/Proof Stress(0.2% Offset) (YS) – (Mpa) | 585 min |
| Elongation in 4D (El) | 15 |
| Reduction | 18 |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
ASTM A453 Grade 660 Class C Nuts are widely utilized in various applications like turbines, pressure vessels, heat exchangers, nuclear reactors, and power generation equipment. They play a crucial role in ensuring tight and secure fastening, even in extreme heat conditions. Thanks to their excellent oxidation and corrosion resistance, these nuts are perfect for use in chemical plants, refineries, and aerospace engines that operate at high temperatures. They excel in steam and gas turbine assemblies, providing leak-proof and vibration-resistant joints. With their impressive tensile strength, durability, and reliability, A453 GR 660 Class C Nuts are the go-to choice for engineers who need trustworthy fasteners for demanding high-stress applications.
At Hazlewood Fasteners, ASTM A 453 GR 660 Class C Nuts are meticulously packaged to ensure their integrity and quality upon delivery. Each batch of nuts is securely packed in durable, protective materials to prevent damage during transit. Our packaging process includes clear labeling for easy identification and compliance with industry standards. We take pride in our commitment to delivering these critical components in perfect condition, ready for use in demanding applications across various industries.
Hazlewood Fasteners is a leading manufacturer and supplier of high-quality fasteners in Canberra, Australia, with over 8 years of experience serving global industries.
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