Stainless Steel 304H Fasteners: Properties, Advantages, and Applications
Stainless steel fasteners play a crucial role in various industries due to their durability, corrosion resistance, and reliability. Among the numerous grades of stainless steel, Stainless Steel 304H Fasteners stand out for their unique properties that make them ideal for high-temperature applications. In this comprehensive guide, we’ll explore what 304H stainless steel fasteners are, their properties, advantages, and the key reasons why they are preferred across industries.
What are Stainless Steel 304H Fasteners?
304H stainless steel Fasteners are made from a high-carbon variant of 304 stainless steel. The “H” in 304H stands for high carbon, and this higher carbon content (0.04% to 0.10%) gives 304H grade enhanced strength and resistance to heat compared to standard 304 stainless steel. These fasteners, like bolts, nuts, washers, and screws, are designed to withstand extreme temperatures while offering excellent corrosion resistance, making them ideal for various demanding applications.
Properties of 304H Stainless Steel Fasteners
304H stainless steel Fasteners exhibit several key properties that differentiate them from other stainless steel grades. Here are the primary 304H stainless steel Fastener properties:
- High Carbon Content: The increased carbon level in 304H stainless steel improves its tensile and yield strength, making these fasteners more robust than their 304 counterparts.
- Heat Resistance: The carbon content allows 304H fasteners to perform exceptionally well in high-temperature environments, maintaining their strength and structural integrity at temperatures up to 900°C (1650°F). This makes them suitable for use in heat exchangers, power generation equipment, and chemical processing facilities.
- Corrosion Resistance: Like all stainless steel alloys, 304H offers excellent resistance to oxidation and corrosion, particularly in environments that are exposed to moisture or corrosive substances. This property ensures long-term durability even under harsh operating conditions.
- Weldability: Despite the higher carbon content, 304H SS Fasteners retain good weldability. They can be welded without preheating and offer ease of fabrication, making them versatile for various applications.
- Toughness at Low Temperatures: While known for their high-temperature performance, SS 304H Fasteners also maintain toughness at lower temperatures, making them ideal for both cold and hot applications.
- Formability and Machinability: Due to its composition, 304H stainless steel is easily machinable and formable into complex shapes, ensuring that these fasteners can be manufactured to meet precise specifications for various industries.
Advantages of 304H Stainless Steel Fasteners
The unique combination of properties in 304H grade stainless steel Fasteners offers several advantages that make them a popular choice in high-performance and high-temperature environments. Some of the key 304H stainless steel Fasteners advantages include:
- Enhanced Strength at Elevated Temperatures: The ability to maintain strength at high temperatures makes SS 304H Fasteners suitable for equipment operating under extreme heat. Their performance at elevated temperatures surpasses that of regular 304 fasteners.
- Superior Corrosion Resistance: Whether exposed to humid, wet environments or high-pressure industrial settings, 304H SS Fasteners resist rust and corrosion, ensuring longevity and reliability.
- Cost-Effectiveness: Despite the premium performance, 304H SS Fasteners are relatively cost-effective compared to other high-performance alloys. Their durability reduces the need for frequent replacement, providing significant cost savings over time.
- Versatile Applications: These fasteners are used in a variety of industries, from oil and gas to chemical processing and power plants. The combination of heat resistance, strength, and corrosion resistance allows them to be used in highly demanding applications.
- Sustainability: Stainless steel is fully recyclable, and the use of 304H SS Fasteners supports sustainable manufacturing practices, reducing the environmental footprint of projects where these fasteners are used.
Schedule and Size Chart
| Type of Fastener | Diameter (mm) | Length (mm) | Thread Pitch | Standard |
| Bolts | 6 mm – 100 mm | 10 mm – 200 mm | Metric Coarse/Fine | DIN, ISO, ASTM |
| Nuts | 5 mm – 100 mm | N/A | Metric Coarse/Fine | DIN, ISO, ASTM |
| Screws | 3 mm – 50 mm | 6 mm – 150 mm | Metric Coarse/Fine | DIN, ISO, ASTM |
| Washers | 5 mm – 120 mm | N/A | N/A | DIN, ISO, ASTM |
| Threaded Rods | 6 mm – 100 mm | 100 mm – 2000 mm | Metric Coarse/Fine | DIN, ISO, ASTM |
Mechanical Properties Chart
| Property | Value |
| Tensile Strength (MPa) | 515 – 740 MPa |
| Yield Strength (MPa) | 205 MPa (minimum) |
| Elongation (%) | 40% (minimum) |
| Hardness (Rockwell B) | 70 – 90 HRB |
| Modulus of Elasticity (GPa) | 193 GPa |
| Poisson’s Ratio | 0.27 – 0.30 |
| Density | 7.93 g/cm³ |
Specifications Chart
| Standard | Specifications |
| ASTM | ASTM A193/A194, ASTM A320 |
| ASME | ASME SA193/SA194, ASME SA320 |
| DIN | DIN 933 (Bolts), DIN 934 (Nuts), etc. |
| ISO | ISO 3506-1 (Bolts, Screws, and Studs) |
| BS | BS 6105 (Fasteners) |
Chemical Composition Chart
| Element | Composition (%) |
| Carbon (C) | 0.04 – 0.10% |
| Chromium (Cr) | 18.0 – 20.0% |
| Nickel (Ni) | 8.0 – 10.5% |
| Manganese (Mn) | 2.00% (max) |
| Silicon (Si) | 1.00% (max) |
| Phosphorus (P) | 0.045% (max) |
| Sulfur (S) | 0.030% (max) |
| Nitrogen (N) | 0.10% (max) |
| Iron (Fe) | Balance |
Physical Properties Chart
| Property | Value |
| Density | 7.93 g/cm³ |
| Melting Point | 1400 – 1450°C |
| Thermal Conductivity at 20°C | 16.2 W/m·K |
| Specific Heat Capacity at 20°C | 500 J/kg·K |
| Electrical Resistivity at 20°C | 0.072 x 10⁶ Ω·m |
| Coefficient of Thermal Expansion | 17.2 μm/m·°C (20 – 100°C) |
Application Chart
| Industry | Applications |
| Petrochemical Industry | Refinery equipment, pressure vessels, heat exchangers |
| Power Generation | Boilers, turbines, nuclear power plants |
| Oil and Gas | Offshore rigs, pipelines, refineries |
| Chemical Processing | Reactors, mixers, chemical storage tanks |
| Automotive | High-temperature exhaust systems, engine components |
| Construction | Bridges, high-rise buildings, structural components |
| Marine | Shipbuilding, marine equipment, coastal infrastructure |
Why Choose Stainless Steel 304H Fasteners?
Choosing 304H stainless steel Fasteners for your project provides several long-term benefits:
- Long-Term Durability: Due to their resistance to wear, corrosion, and heat, these fasteners offer long-lasting performance even in extreme conditions. This durability reduces the need for maintenance and replacement, contributing to lower long-term costs.
- Increased Safety: In industries like petrochemicals, oil and gas, and power generation, the failure of fasteners can lead to catastrophic consequences. 304H SS Fasteners minimize the risk of failure in extreme heat and corrosive environments, ensuring safety and operational continuity.
- Easy Availability: Despite their specialized properties, 304H stainless steel Fasteners are widely available and come in various sizes and shapes, making them accessible for different industrial needs.
- Compliance with Industry Standards: Most SS 304H Fasteners meet or exceed global industry standards for performance, safety, and reliability, ensuring that you are using high-quality components in your projects.
SS 304H Fasteners offer an outstanding combination of strength, heat resistance, and corrosion resistance, making them an ideal choice for industries that demand superior performance under harsh conditions. Whether you are operating in high-temperature environments or dealing with corrosive chemicals, 304H grade stainless steel Fasteners provide the durability and reliability needed to keep your operations running smoothly.
Global Reach
Amardeep Steel Centre boasts a robust global presence, 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 Stainless Steel 304H 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.
