Majid Fasteners is a leading producer and supplier of high-quality industrial fastener products and services based in Dubai, United Arab Emirates. Our company has established itself as a reputable source for a variety of industrial applications. The primary focus of our business isproviding custom engineered products to meet each customer’s unique needs, using the highest quality materials available to ensure maximum performance and longevity of the fasteners supplied. We design and manufacture our products utilizing the latest technology to guarantee our fastener products meet or exceed all applicable international specifications for safety and quality. In addition, we are committed to providing our customers with timely deliveries, competitive pricing and customization options to assist them with their project requirements.
The ASTM A193 B8M bolt is made from Type 316 austenitic stainless steel with significant amounts of chromium, nickel, and molybdenum that give it exceptional resistance to corrosion and chemicals. The standard chemistry includes 16 to 18% chromium, 10 to 14% nickel, and 2 to 3% molybdenum, which increase the erosion protection in both saline and acidic conditions. These bolts also have high tensile strength and yield strength, as well as great toughness and stable operation in high-temperature applications. In addition, they provide very good protection from pitting, crevice corrosion, or stress corrosion cracking. As such, they are ideal for use in many industrial applications where the strength and corrosion resistance of the fastener must remain consistent over time.
|
Material |
Specification |
Standards |
Size |
Length |
|
ASTM A193 B8M Bolt |
IS BS ASTM |
DIN, ISO, JIS, GB, IS, BS, ASTM |
M 02 to M 160 |
3 mm to 200 mm |
| 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% |
| 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 |
Bolts specified by ASTM A193 B8M are found in many applications where resistance to corrosion, durability, and dependable performance are necessary. For example, these bolts can be found on offshore oil well platforms, marine facilities, and desalination plants because of the negative effects of seawater and other chloride-laden waters on equipment. Due to their inherent resistance to harsh chemicals at elevated temperatures, they are also commonly used to secure heat exchangers, reactors, valves, and pumps in the chemical and petrochemical fields. They have an additional application in the pharmaceutical and food-processing industries because of their non-reactive nature and hygienic properties. Finally, B8M type bolts can also be found in long-life and corrosion-resistant fastener applications including piping, pressure vessels, and many types of industrial machinery.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
