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The Fasteners Mart, which is a Mumbai, India-based fastener manufacturer and supplier of quality fasteners, specifically trades in ASTM A193 B8 bolts. These stainless steel grade 304 bolts are utilized due to their high strength, corrosion resistance, and durability, and therefore they are best suited for use at high pressure and temperature. Being a reliable supplier, The Fasteners Mart is dedicated to ensuring all the products meet the high ASTM standards, offering effective and reliable solutions to companies worldwide. They differentiate themselves from other competitors in the fasteners industry based on quality and customer satisfaction.
ASTM A193 B8 bolts are produced from stainless steel grade 304, which contains 18-20% chromium and 8-10.5% nickel, offering very good strength and corrosion resistance. The bolts possess good formability and weldability, and therefore they are highly suitable for application in high pressure and temperature service. The mechanical properties are minimum yield strength 30 ksi (205 MPa) and tensile strength 75-85 ksi (515-585 MPa). With a hardness limit of 95 HRB, ASTM A193 B8 bolts are high-performance bolts under extreme environments, with the assurance of durability, reliability, and long service life under critical industrial applications.
|
Material |
Specification |
Standards |
Size
|
Length |
|
ASTM A193 B8 Bolt
|
IS
BS
ASTM
|
DIN, ISO, JIS, GB, IS, BS, ASTM |
M 02 to M 160
|
3 mm to 200 mm
|
| 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 |
| 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% |
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 bolts, manufactured from stainless steel grade 304, have wide usage in industries where high strength, corrosion resistance, and durability are needed. The bolts have common usage in chemical, petrochemical, power generation, and gas and oil industries, where high temperature and high pressure prevail. They are optimally applied in heat exchangers, reactors, pressure vessels, and boilers. Furthermore, ASTM A193 B8 bolts are used in marine, food processing, and pharmaceutical industries since they provide excellent oxidation and corrosion resistance. Their reliability ensures long-lasting performance in critical systems, with the assurance of safety and structural integrity in harsh conditions.
ASTM A193 B8 bolts are accurately packaged to make it safe for transport and cushioning them during handling to prevent damage. They are usually crated in wood crates, cartons, or in moisture-resistant packages to safeguard them against corrosion. Each lot is stringently tested, i.e., visual inspection, testing of dimensions, mechanical property testing, and analysis of material composition to ensure adherence to ASTM requirements. In addition, tests such as tensile strength, hardness, and corrosion resistance are conducted to ensure compliance with the quality and performance specifications required for use in industry.
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