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Rinku Fasteners, operating from the major engineering center of Kolkata, India, is a trusted manufacturer and supplier of robust ASTM A193 B7 Fasteners. Known for quality craftsmanship and dependable performance, the company produces fasteners engineered to withstand high pressure, elevated temperatures, and demanding mechanical conditions. ASTM A193 B7, a widely used alloy steel grade, provides excellent strength and reliability in critical applications. With advanced manufacturing capabilities and stringent quality checks, Rinku Fasteners ensures that every fastener meets global standards and delivers consistent, long-lasting performance in diverse industrial environments.
ASTM A193 B7 Fasteners are crafted from quenched and tempered chromium-molybdenum alloy steel, giving them superior mechanical strength and durability. These fasteners offer high tensile and yield strength, impressive hardness, and excellent resistance to thermal stress. Their heat-treatment process enhances structural integrity, making them suitable for high-temperature and high-pressure applications. They also provide good fatigue resistance and dimensional stability under continuous mechanical loads. This combination of alloy composition and heat treatment makes B7 fasteners a reliable choice for demanding industrial operations requiring strength and performance.
| Grade | C | Mn | P | S | Si | Cr | Mo |
| ASTM A193 B7 | 0.37 – 0.49 | 0.65 – 1.10 | 0.035 max | 0.04 max | 0.15 – 0.35 | 0.75 – 1.20 | 0.15 – 0.25 |
| Grade | Markings | Size | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA, %, min | Hardness Max |
| B7 | B7 | Up to 2-½ | 125 | 105 | 16 | 50 | C35 |
| 2-5/8 to 4 | 115 | 95 | 16 | 50 | C35 | ||
| 4-1/8 to 7 | 100 | 75 | 18 | 50 | C35 |
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 B7 Fasteners are widely used in industries that rely on high-strength components capable of withstanding extreme conditions. They are commonly utilized in oil and gas refineries, petrochemical plants, and power generation systems due to their ability to perform under pressure and heat. These fasteners are essential in boilers, heat exchangers, pressure vessels, piping systems, and turbine assemblies. Construction, heavy machinery, and industrial equipment manufacturers also depend on them for secure, long-lasting fastening. Whether in high-pressure steam systems or rugged mechanical environments, ASTM A193 B7 Fasteners ensure reliability and stability in critical applications.
At Rinku Fasteners, we ensure that our ASTM A193 B7 fasteners are packaged with the utmost care to maintain their quality and integrity. Each fastener is meticulously packed in durable, moisture-resistant materials to prevent corrosion and damage during transit. Our packaging solutions include clear labeling and secure containment to facilitate easy handling and identification. We prioritize the safe delivery of our products, ensuring they arrive in perfect condition, ready for immediate use in your critical applications.
Rinku Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kolkata, India, with over 8 years of experience serving global industries.
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