ASTM A193 B8 CL2 Bolts Manufacturer and Supplier in Dubai, UAE
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Majid Fasteners is a reputable company in the manufacturing and supply of high quality industrial fasteners in Dubai, UAE, which specializes in high performance bolts of ASTM A193 B8 Class 2. Our product focus on quality, durability and precision engineering makes us serve various industries that need high quality fastening solutions. We have a wide range of manufacturing capabilities, high quality standards and customer satisfaction, which renders us the choice of companies in the region, which require corrosion and high-strength stainless steel bolts.
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What is ASTM A193 B8 CL2 Bolts?
ASTM A193 B8 Class2 bolts are made from carbide-solution treated, strain-hardened stainless steel grade 304 and will provide high strength and corrosion resistance. The typical chemical makeup of this bolt contains chromium (18% – 20%), nickel (8% – 12%), and controlled carbon content for better durability compared to Class1.ASTM A193 B8 Class2 bolts also have greater mechanical properties when tested under tensile loads than Class1. The expected tensile strength of an ASTM A193 B8 Class2 bolt is approximately 100ksi, while they possess superior hardness than other grades of bolts because of strain hardening. In addition, ASTM A193 B8 Class2 bolts have excelled at performing under both high temperatures and corrosive environments, which make them suitable for use in chemical, industrial, and petrochemical applications.
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ASTM A193 B8 CL2 Bolts Specifications
|
Material |
Specification |
Standards |
Size |
Length |
|
ASTM A193 B8 CL2 Hex Bolt |
IS BS ASTM |
DIN, ISO, JIS, GB, IS, BS, ASTM |
M 02 to M 160 |
3 mm to 200 mm |
ASTM A193 B8 CL2 Bolts Chemical Composition
| Element | B7 | B8 | B8M |
| 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% |
ASTM A193 B8 CL2 Bolts Mechanical Properties
| 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 Class 1 | All | 75 | 30 | 30 | 50 |
| B8M Class 1 | All | 75 | 30 | 30 | 50 |
| B8 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 | |
| B8M Class 2 | Up to 3/4 | 110 | 95 | 15 | 45 |
| 7/8 – 1 | 100 | 80 | 20 | 45 | |
| 1-1/8 – 1-1/4 | 95 | 65 | 25 | 45 | |
| 1-3/8 – 1-1/2 | 90 | 50 | 30 | 45 |
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Types of ASTM A193 B8 CL2 Bolts
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ASTM A193 B8 CL2 Bolts Uses
ASTM A193 B8 Class 2 bolts are prevalent in the industries which require high strength, resistance to corrosion and dependable performance in adverse conditions. The bolts are mostly used in chemical plants, refineries, petrochemical plants and power generation systems because of their heat and corrosive media resistance. They can also be applied in pressure vessels, heat exchangers, flanges, valves and pipeline assemblies. They are durable in their stainless-steel composition in marine settings and food processing machinery. Their superior mechanical characteristics qualify them to be applied in demanding fastening that require safety, stability and longevity.






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