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At Hazlewood Fasteners, we manufacture and supply top-quality Hastelloy Washers in Canberra, Australia, crafted to perform flawlessly in highly corrosive and extreme environments. Made from a nickel-molybdenum-chromium-based superalloy, these washers provide exceptional resistance to oxidation, pitting, and stress corrosion cracking. Known for their remarkable durability and strength, Hastelloy Washers are trusted in industries where standard stainless steels fail. Whether used in chemical processing plants, marine systems, or aerospace assemblies, our washers deliver unmatched reliability, ensuring long-term sealing, load distribution, and stability in even the most aggressive operating conditions.
Hastelloy Washers are primarily composed of nickel (55–65%), molybdenum (15–30%), and chromium (12–23%), with small additions of iron, cobalt, tungsten, and manganese to enhance corrosion resistance and strength. They exhibit excellent mechanical properties, including a tensile strength up to 790 MPa and yield strength around 355 MPa, maintaining stability across a wide temperature range. These washers provide superior resistance to both oxidizing and reducing agents, making them suitable for use in acidic and high-stress environments. Their outstanding metallurgical stability ensures durability and reliability under continuous chemical exposure.
| Specifications | ASTM B574 / ASME SB574 |
|---|---|
| Fasteners size | Bolt / Screw Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes Nuts Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes Washers Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes Machine Screws Size : M1.6 – M12 Self Tapping Screw Size : No.2 – No. 14 |
| Fasteners Length | 3 mm to 200 mm |
| Fastener Threads | UNF, BSW, BSF, METRIC, UNC or as required |
| Standard of High Nickel Alloy Fasteners | DIN : DIN 934, DIN 931, DIN 970, DIN 933 UTS : UNEF, NPT, UNC, UNS, UNF, NPTF ISO : JIS standards, ISO 4033, ISO 4032, ANSI – American National Standards Institute ASME B18.5 ANSI B 28.2.4 1M as per defined in ASME B16.5 standard Stud Bolt length ANSI B 18.2.4 2M as per defined in ASME B18.2.2 Hex nuts |
| Dimensions | DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3 |
| Surface Coating | Ptfe Coated High Nickel Alloy Fasteners Phosphate Coating Teflon Coating Zinc Coating Hot Dipped Galvanizing Coating Cadmium Coating Xylon Coating |
| Fasteners Finishing | High Nickel Alloy : Self-Colour, Passivated, Bright Zinc Plated (BZP), Hot Dip Galvanised (HDG), High Nickel Alloy, Sherardized, some special one like DACROMET Geometry and Mechanically Applied coating ,Dacroment, nickel plated, anodizing, plated zinc-nickel Zinc (blue, black, yellow, white), black oxide. |
| Grade | C | Mn | Si | Co | S | Ni | Cr | Fe | Mo | W | V | P |
| Hastelloy Fasteners | 0.010 max | 1.0 max | 0.08 max | 2.5 max | 0.03 max | Bal | 14.5 – 16.5 | 4 – 7 | 15 – 17 | 3 – 4.5 | 0.35 max | 0.04 max |
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Hastelloy Fasteners | 8.89 g/cm3 | 1370 °C (2500 °F) | Psi – 1,15,000 , MPa – 790 | Psi – 52,000 , MPa – 355 | 40 % |
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.
Hastelloy Washers are extensively used in chemical processing, petrochemical plants, power generation, marine environments, and aerospace systems. Their superior corrosion resistance makes them ideal for sealing and load-bearing applications in acidic gas scrubbers, heat exchangers, reactors, and pressure vessels. In marine and offshore operations, they effectively withstand chloride and saltwater corrosion, ensuring long-term reliability. In aerospace and nuclear industries, they offer exceptional performance under thermal stress and corrosive atmospheres. Engineered for precision and endurance, Hazlewood Fasteners’ Hastelloy Washers deliver the strength and stability required for critical operations in harsh industrial conditions.
We at Hazlewood Fasteners make sure that our Hastelloy washers are packed with great care and precaution. The washers are packed in groups of one each in individual protective covers to avoid scratching, rusting or getting contaminated in the process. Some of our packaging products include; cartons that are highly durable and packaging solutions that are made to order. They help in easy identification and packing to enhance our reputation of delivering quality products in good condition.
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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