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Aria Fasteners, located in Hamilton, New Zealand, is your go-to source for top-notch ASTM A193 B8 CL2 fasteners, which include bolts, stud bolts, nuts, and washers. These fasteners are designed to deliver strength, durability, and reliability, making them perfect for tough industrial settings. They ensure secure connections even in high-pressure, high-temperature, and corrosive environments. At Aria Fasteners, we take pride in meeting strict quality standards, so you can trust that our products will maintain their structural integrity and perform dependably across various industries, including chemical, petrochemical, power generation, and marine.
Crafted from austenitic stainless steel, usually 316, our ASTM A193 B8 CL2 fasteners boast exceptional corrosion resistance, high tensile strength, and impressive toughness. The CL2 grade offers extra protection against chlorides, oxidation, and stress corrosion cracking, making these fasteners particularly suitable for marine, chemical, and offshore applications. Their mechanical stability under heavy loads, vibrations, and temperature fluctuations guarantees secure fastening and long-lasting durability in critical assemblies.
| Element | B7 | B8 CL2 | B8 CL2M |
| Carbon | 0.37 – 0.49% | 0.08% max | 0.08% max |
| Manganese | 0.65 – 1.10% | 2.00% max | 2.00% max |
| Phosphorus, max | 0.035% | 0.045% | 0.045% |
| Sulfur, max | 0.040% | 0.030% | 0.030% |
| Silicon | 0.15 – 0.35% | 1.00% max | 1.00% max |
| Chromium | 0.75 – 1.20% | 18.0 – 20.0% | 16.0 – 18.0% |
| Nickel | 8.0 – 11.0% | 10.0 – 14.0% | |
| Molybdenum | 0.15 – 0.25% | 2.00 – 3.00% |
| Grade | Size | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA % min |
| B7 | Up to 2-1/2 | 125 | 105 | 16 | 50 |
| 2-5/8 – 4 | 115 | 95 | 16 | 50 | |
| 4-1/8 – 7 | 100 | 75 | 18 | 50 | |
| B8 CL2 Class 1 | All | 75 | 30 | 30 | 50 |
| B8 CL2M Class 1 | All | 75 | 30 | 30 | 50 |
| B8 CL2 Class 2 | Up to 3/4 | 125 | 100 | 12 | 35 |
| 7/8 – 1 | 115 | 80 | 15 | 35 | |
| 1-1/8 – 1-1/4 | 105 | 65 | 20 | 35 | |
| 1-3/8 – 1-1/2 | 100 | 50 | 28 | 45 | |
| B8 CL2M Class 2 | Up to 3/4 | 110 | 95 | 15 | 45 |
|
Material |
Specification |
Standards |
Size
|
Length |
|
ASTM A193 B8 CL2 Fasteners
|
IS
BS
ASTM
|
DIN, ISO, JIS, GB, IS, BS, ASTM |
M 02 to M 160
|
3 mm to 200 mm
|
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 A193 B8 CL2 fasteners are extensively used in high-temperature and high-pressure environments, such as chemical processing, petrochemical, and power generation industries. Their excellent corrosion resistance and high tensile strength make them ideal for securing reactors, heat exchangers, and pressure vessels. These fasteners are also suitable for marine applications and construction projects requiring robust and reliable fastening solutions. Their compliance with stringent ASTM standards ensures they meet the demanding requirements of critical industrial applications.
These fasteners find extensive use in the oil and gas sector, chemical processing plants, power generation, and high-pressure piping systems. They’re perfect for flange connections, pressure vessels, and other vital bolted assemblies where reliability, corrosion resistance, and strength are non-negotiable. When you choose ASTM A193 B8 CL2 fasteners from Aria Fasteners, you’re opting for long-term performance, structural integrity, and reduced maintenance—making them the preferred choice for industries that prioritize safety, durability, and high-quality fastening solutions.
Aria Fasteners is a leading manufacturer and supplier of high-quality fasteners in Hamilton, New Zealand, with over 8 years of experience serving global industries.
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