ASTM A193 Alloy Steel Fasteners: Properties, Advantages, and Suppliers
ASTM A193 Alloy Steel Fasteners are widely known for their superior strength, durability, and resistance to extreme conditions. These fasteners are specifically designed for high-pressure, high-temperature environments, making them ideal for industries like petrochemical, power generation, and heavy equipment manufacturing. As a leading supplier and exporter, ASC LLP provides high-quality ASTM A193 Alloy Steel Fasteners to meet the specific needs of these demanding industries.
In this detailed guide, we will explore what ASTM A193 Alloy Steel Fasteners are, their key properties, and advantages, and why they are the top choice for a wide range of industrial applications.
What is ASTM A193 Alloy Steel Fasteners?
ASTM A193 is a specification that covers alloy and stainless steel bolting materials intended for use in pressure vessels, valves, flanges, and fittings for high-temperature or high-pressure service. These fasteners are used in applications that require high strength and excellent resistance to corrosion, oxidation, and extreme environments.
The fasteners under ASTM A193 can be manufactured in various grades, such as B7, B7M, B16, and others. Each grade offers different properties suited to specific temperature ranges and pressure levels.
Properties of ASTM A193 Alloy Steel Fasteners
One of the main reasons for the popularity of ASTM A193 Alloy Steel Fasteners is their impressive properties, making them suitable for some of the most demanding environments.
- High Tensile Strength: ASTM A193 Alloy Steel Fasteners are designed to withstand extremely high tensile loads, which makes them suitable for heavy-duty applications such as power plants and oil refineries. Their excellent strength ensures that they hold tight even under high pressure and tension.
- Temperature Resistance: One of the distinguishing features of A193 Alloy Steel Fasteners is their exceptional resistance to both high and low temperatures. These fasteners perform reliably even in extreme heat, making them ideal for environments where thermal stability is crucial, such as power plants and chemical processing facilities.
- Corrosion Resistance: Alloy steel fasteners ASTM A193 are treated to resist corrosion, which extends their lifespan even in harsh and corrosive environments like offshore oil platforms and chemical processing plants. The addition of elements such as chromium and molybdenum in the alloy enhances the fasteners’ ability to resist corrosion and oxidation.
- Oxidation Resistance: These fasteners offer excellent oxidation resistance, ensuring that they maintain their integrity even when exposed to oxygen-rich environments. This is particularly important in industrial settings where the fasteners may be exposed to high levels of oxygen or other reactive elements.
- Versatility: ASTM A193 Alloy Steel Fasteners come in multiple grades, which allows them to be used in a wide variety of applications. Whether you need fasteners for high-temperature furnaces or high-pressure vessels, there’s a suitable grade available for your specific requirement.
Advantages of ASTM A193 Alloy Steel Fasteners
Using ASTM A193 Alloy Steel Fasteners offers numerous advantages for industrial applications. Below are some of the top reasons why they are a preferred choice for high-pressure and high-temperature environments:
- Longevity: Due to their corrosion, oxidation, and wear resistance, these fasteners have an extended lifespan, reducing the need for frequent replacements. This leads to reduced downtime and maintenance costs for industries that rely on continuous operation.
- Enhanced Safety: ASTM A193 Alloy Steel Fasteners are designed to maintain their integrity under extreme conditions, making them a safer option for high-stress applications. They reduce the risk of failure in critical environments such as oil refineries and chemical plants.
- Cost-Effective: While alloy steel fasteners might have a higher initial cost compared to carbon steel, their long lifespan, minimal maintenance, and high performance make them a cost-effective solution over time. The longevity of ASTM A193 fasteners helps save on replacement and labor costs.
- Customization Options: ASTM A193 Alloy Steel Fasteners can be customized to meet specific industry requirements. Whether you need specific coatings, sizes, or threading options, these fasteners can be tailored to ensure they meet the exact needs of the application.
- Compliance with International Standards: Fasteners that meet ASTM A193 standards are recognized worldwide, ensuring compliance with international codes and standards. This makes them suitable for global projects where standardization and quality control are critical.
Schedule and Size Chart
| Size (Diameter) | Threads per Inch (TPI) | Length Range (Inches) | Nominal Diameter (Inches) |
| 1/4″ | 20 | 1″ to 6″ | 0.25 |
| 5/16″ | 18 | 1″ to 6″ | 0.3125 |
| 3/8″ | 16 | 1″ to 8″ | 0.375 |
| 1/2″ | 13 | 1″ to 10″ | 0.5 |
| 5/8″ | 11 | 1″ to 12″ | 0.625 |
| 3/4″ | 10 | 1″ to 14″ | 0.75 |
| 7/8″ | 9 | 2″ to 16″ | 0.875 |
| 1″ | 8 | 2″ to 18″ | 1.0 |
| 1 1/4″ | 7 | 2″ to 24″ | 1.25 |
| 1 1/2″ | 6 | 3″ to 30″ | 1.5 |
Mechanical Properties Chart
| Property | Grade B7 | Grade B16 | Grade B8 Class 1 | Grade B8 Class 2 |
| Tensile Strength (ksi) | 125 min | 125 min | 75 min | 100 min |
| Yield Strength (ksi) | 105 min | 105 min | 30 min | 75 min |
| Elongation (%) | 16 min | 16 min | 30 min | 20 min |
| Reduction of Area (%) | 50 min | 50 min | 55 min | 45 min |
| Hardness (Brinell) | 223-352 HBW | 223-352 HBW | 137-217 HBW | 223-352 HBW |
Specifications Chart
| Standard | Description |
| ASTM A193 | Covers alloy and stainless steel bolting materials for pressure vessels, valves, flanges, and fittings for high-temperature or high-pressure service. |
| ASTM A194 | Covers carbon, alloy, and stainless steel nuts used with bolts specified in ASTM A193. |
| ASME B1.1 | Unified Inch Screw Threads (UN and UNR Thread Form). |
| ASME B18.2.1 | Dimensions for Square and Hex Bolts. |
| ASME B18.2.2 | Dimensions for Square and Hex Nuts. |
| ASME B18.31.2 | Continuous Thread Studs and Double-End Studs. |
Chemical Composition Chart
| Element | Grade B7 | Grade B16 | Grade B8 Class 1 | Grade B8 Class 2 |
| Carbon (C) | 0.37 max | 0.40 max | 0.08 max | 0.08 max |
| Manganese (Mn) | 0.65-1.10 | 0.60-1.10 | 2.00 max | 2.00 max |
| Phosphorus (P) | 0.035 max | 0.035 max | 0.045 max | 0.045 max |
| Sulfur (S) | 0.040 max | 0.040 max | 0.030 max | 0.030 max |
| Silicon (Si) | 0.15-0.35 | 0.15-0.35 | 1.00 max | 1.00 max |
| Chromium (Cr) | 0.75-1.20 | 0.50-0.80 | 18.00-20.00 | 18.00-20.00 |
| Molybdenum (Mo) | 0.15-0.25 | 0.45-0.65 | – | – |
| Nickel (Ni) | – | – | 8.00-10.50 | 8.00-10.50 |
Physical Properties Chart
| Property | Grade B7 | Grade B16 | Grade B8 Class 1 | Grade B8 Class 2 |
| Density (g/cm³) | 7.85 | 7.85 | 7.93 | 7.93 |
| Melting Point (°C) | 1425-1530 | 1425-1530 | 1375-1425 | 1375-1425 |
| Coefficient of Thermal Expansion (µm/m°C) | 11.7 | 12.0 | 16.0 | 16.0 |
| Modulus of Elasticity (GPa) | 205 | 200 | 193 | 193 |
| Thermal Conductivity (W/m·K) | 46.6 | 45.7 | 15.0 | 15.0 |
Application Chart
| Industry | Application | Fastener Type |
| Oil and Gas | High-pressure pipelines, valves, pressure vessels, flanges | Studs, Bolts, Nuts |
| Power Generation | Boilers, steam turbines, reactors, heat exchangers | Studs, Bolts, Threaded Rods |
| Petrochemical | Reactors, compressors, high-temperature piping | Bolts, Nuts, Washers |
| Chemical Processing | Chemical reactors, distillation towers, pumps, and mixers | Hex Bolts, Studs, Threaded Rods |
| Marine Applications | Shipbuilding, offshore oil platforms, saltwater processing units | Nuts, Bolts, Studs |
| Construction | Structural bolting, industrial equipment assembly | Bolts, Nuts, Washers |
Why Choose ASC LLP as Your Supplier for ASTM A193 Alloy Steel Fasteners?
As one of the leading A193 Alloy Steel Fasteners exporters and suppliers, ASC LLP offers a wide range of high-quality alloy steel fasteners that meet ASTM standards. Our products are manufactured to the highest specifications and undergo rigorous testing to ensure optimal performance in challenging conditions.
- Quality Assurance: We ensure that our ASTM A193 Alloy Steel Fasteners are made from top-quality materials, undergo stringent quality control procedures, and comply with international standards. Every batch is tested for strength, durability, and resistance properties.
- Competitive Pricing: At ASC LLP, we offer competitive pricing on all our products without compromising quality. Our efficient production processes allow us to deliver top-grade ASTM A193 Alloy Steel Fasteners at market-leading prices.
- Global Reach: As a trusted supplier, we serve clients worldwide. Our robust supply chain ensures timely delivery, whether you are located in the United States, Europe, the Middle East, or any other part of the world.
- Custom Solutions: If you need specific sizes, grades, or finishes, we provide customized solutions to meet your project requirements. Our team of experts works closely with clients to ensure that they receive the exact fasteners they need for their applications.
In summary, ASTM A193 Alloy Steel Fasteners are an essential component in industries that operate under extreme conditions. With properties such as high tensile strength, corrosion resistance, and excellent temperature stability, these fasteners ensure the durability and safety of critical industrial equipment.
Global Reach
Amardeep Steel Centre boasts a robust global presence and is committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality ASTM A193 Alloy Steel Fasteners. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.
Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.
