ASTM A194 Alloy Steel Nuts Supplier in India | ASTM A194 Grade 7 Nuts Manufacturer & Exporter
ASTM A194 Alloy Steel Nuts are high-strength fastening components designed for use with high-pressure and high-temperature bolting applications. Manufactured from alloy steel grades such as Grade 4 and Grade 7, these nuts offer excellent tensile strength, durability, corrosion resistance, and reliability in demanding industries including oil & gas, petrochemical, power generation, offshore, and heavy engineering. As a trusted ASTM A194 Alloy Steel Nuts Supplier in India, we offer heavy hex nuts, high tensile alloy steel nuts, and precision-engineered fastening solutions in multiple dimensions and specifications.
What are ASTM A194 Alloy Steel Nuts?
ASTM A194 Alloy Steel Nuts are fasteners manufactured from alloy steel and designed to meet the requirements of the ASTM A194 standard. This specification covers nuts made of carbon, alloy, and stainless steel, intended for high-pressure and high-temperature services. The standard is primarily used for fasteners that connect pipelines, pressure vessels, valves, and fittings in industries like oil and gas, chemical processing, and power generation.
The A194 Alloy Steel Nuts are manufactured using high-grade alloy steel, which provides superior strength, toughness, and corrosion resistance compared to standard carbon steel nuts. They are designed to handle the harshest conditions, including extreme temperatures and heavy loads.
ASME SA194 Alloy Steel Nuts are specifically designed to withstand:
- High operating temperatures
- Extreme pressure conditions
- Heavy mechanical loads
- Corrosive industrial environments
- Thermal cycling applications
Their robust construction makes them suitable for critical applications where safety, reliability, and performance are essential.
ASTM A194 Alloy Steel Nuts Manufacturer, Supplier & Exporter
ASTM A194 Alloy Steel Nuts India | Alloy NutsSupplier As a top ASTM A194 Alloy Steel Nuts provider in India, we supply high quality fasteners designed to work with great success at high temperature and extremely harsh mechanical stress. ASTM A194 Alloy steel nuts are manufactured with strict international standards to assure excellent functionality in any tough application in any critical industry.
These steel alloy nuts are a typical choice for use withASTM A193 bolts and studs to make sure safe installation and application in heat exchangers, valves, pipe lines, pressure vessels, pipe lines flanges and machines. Made of specific grades of steel alloy they ensure excellent accuracy of dimension, good tensile strength and useful service life for longer periods.
We hold stock of A194 heavy hex nuts, A194 regular hex nuts, special nuts and special custom made fasteners to fulfill client demands of several kinds of shapes and dimensions along with different surface coatings and threads form.
ASTM A194 Alloy Steel Nuts Properties
The ASTM A194 Alloy Steel Nuts possess unique mechanical and chemical properties that make them an ideal choice for demanding applications. Below are some key properties of these nuts:
- High Tensile Strength: These nuts exhibit high tensile strength, allowing them to endure heavy loads and high pressure without deformation. This property makes them ideal for industrial machinery and high-stress environments.
- Corrosion Resistance: Alloy steel used in ASTM A194 nuts offers excellent corrosion resistance, especially in environments where exposure to chemicals, water, and corrosive substances is frequent. This increases the durability and lifespan of the nuts.
- Temperature Resistance: One of the primary features of Alloy Steel Nuts ASTM A194 is their ability to withstand high temperatures, making them perfect for use in applications like boilers, furnaces, and power plants where heat is an issue.
- Chemical Composition: The composition of A194 Alloy Steel Nuts typically includes elements like manganese, carbon, sulfur, phosphorus, and sometimes molybdenum. The precise combination of these elements ensures the nuts are highly durable and resistant to wear and tear in aggressive conditions.
- Dimensional Accuracy: These nuts are manufactured with precision to ensure exact dimensions and a perfect fit, which is critical for secure fastening in high-pressure applications.
ASTM A194 Grade 7 Nuts Manufacturer
As an experienced ASTM A194 Grade 7 Nuts Manufacturer, we supply high-strength nuts manufactured from heat-treated alloy steel that provides superior mechanical properties.
Key Features of ASTM A194 Grade 7 Nuts
- High tensile strength
- Excellent load-bearing capacity
- Superior fatigue resistance
- Enhanced durability
- Reliable performance at elevated temperatures
- Suitable for pressure-retaining applications
These nuts are commonly paired with ASTM A193 Grade B7 studs and bolts in industrial piping systems, pressure vessels, refineries, and power plants.
ASTM A194 High Tensile Alloy Steel Grade 4 Nuts
ASTM A194 High Tensile Alloy Steel Gr. 4 Nuts are widely used in applications requiring enhanced mechanical strength and reliable fastening performance. Manufactured through controlled heat treatment processes, these nuts offer excellent resistance to deformation and wear under demanding operating conditions.
Benefits of Grade 4 Nuts
- High tensile properties
- Excellent dimensional stability
- Good impact resistance
- Long service life
- Suitable for medium and high-temperature environments
- Consistent thread accuracy
As a trusted ASTM A194 Alloy Steel Gr. 4 Nuts Dealer, we maintain a comprehensive inventory of standard and custom sizes for industrial applications.
Schedule and Size Chart
| Nut Size (Diameter) | Thread Size (TPI) | Height (mm) | Width Across Flats (mm) | Width Across Corners (mm) |
| 1/4″ | 20 | 7 | 11 | 12.7 |
| 3/8″ | 16 | 8 | 16 | 18.5 |
| 1/2″ | 13 | 10 | 19 | 21.3 |
| 5/8″ | 11 | 11 | 24 | 26.5 |
| 3/4″ | 10 | 13 | 30 | 33.3 |
| 1″ | 8 | 17 | 36 | 41.0 |
| 1-1/4″ | 7 | 23 | 50 | 53.6 |
| 1-1/2″ | 6 | 26 | 60 | 66.5 |
| 2″ | 4.5 | 30 | 75 | 81.5 |
Mechanical Properties Chart
| Grade | Tensile Strength (MPa) | Proof Load Stress (MPa) | Hardness (Brinell) | Hardness (Rockwell) |
| 2H | 850 | 700 | 248-352 | C24-C35 |
| 2HM | 660 | 500 | 159-235 | B85-C22 |
| 4 | 1040 | 860 | 271-352 | C28-C35 |
| 7 | 860 | 725 | 248-331 | C24-C35 |
| 7M | 725 | 620 | 217-291 | C18-C31 |
| 8 | 515 | 205 | 131-223 | B71-C24 |
ASTM A194 Alloy Steel Grade 4 Nut Fastener Specifications
| Specification | Details |
| Standard | ASTM A194 / ASME SA194 |
| Product Type | Heavy Hex Nuts, Hex Nuts, Special Nuts |
| Grades | Grade 4, Grade 7 |
| Material | Alloy Steel |
| Size Range | 1/4″ to 4″ and above |
| Thread Type | UNC, UNF, Metric |
| Finish | Plain, Black Oxide, Zinc Plated, Hot Dip Galvanized, PTFE Coated |
| Manufacturing Process | Forged, Heat Treated, Machined |
| Testing | Mechanical, Dimensional, Hardness, Chemical Analysis |
Chemical Composition Chart
| Element | Grade 2H (%) | Grade 4 (%) | Grade 7 (%) | Grade 8 (%) |
| Carbon | 0.40 max | 0.25 max | 0.45 max | 0.08 max |
| Manganese | 1.00 min | 0.60-0.90 | 0.60-0.90 | 2.00 max |
| Phosphorus | 0.04 max | 0.045 max | 0.035 max | 0.045 max |
| Sulfur | 0.05 max | 0.05 max | 0.045 max | 0.03 max |
| Silicon | 0.15-0.35 | 0.15-0.35 | 0.20-0.50 | 1.00 max |
| Chromium | — | 0.90-1.20 | 0.90-1.20 | 18.0-20.0 |
| Molybdenum | — | — | 0.15-0.25 | — |
| Nickel | — | — | 8.0-10.0 | 8.0-11.0 |
Physical Properties Chart
| Property | Value |
| Density | 7.85 g/cm³ (alloy steel) |
| Melting Point | 1425-1540°C (depending on alloy) |
| Thermal Conductivity | 30-50 W/m·K |
| Modulus of Elasticity | 190-210 GPa |
| Electrical Resistivity | 0.6-1.2 μΩ·m (depending on composition) |
| Magnetic Properties | Ferromagnetic (subject to composition) |
A194 Heavy Hex Nuts Supplier in India
A194 Heavy Hex Nuts are among the most commonly used fasteners in industrial piping and structural applications. Their larger bearing surface distributes loads more effectively than standard hex nuts, reducing stress concentration and improving joint integrity.
Advantages of Heavy Hex Nuts
- Greater bearing surface area
- Improved clamping force
- Enhanced resistance to loosening
- Better load distribution
- Suitable for high-pressure assemblies
- Increased structural reliability
Our heavy hex nuts are manufactured with strict dimensional tolerances to ensure proper fitment with matching bolts and studs.
UNS G41400 Heavy Hex Nuts Applications
UNS G41400 Heavy Hex Nuts are manufactured from chromium-molybdenum alloy steel, offering superior strength and toughness for demanding industrial environments.
Common Applications
Oil & Gas Industry
Used in drilling equipment, offshore platforms, pipelines, and pressure vessels.
Petrochemical Plants
Suitable for reactors, heat exchangers, process piping, and storage systems.
Power Generation
Widely used in thermal, nuclear, and renewable energy facilities.
Refineries
Provides reliable fastening for critical process equipment and high-temperature systems.
Marine & Offshore
Offers durability in challenging operating conditions and corrosive environments.
Heavy Engineering
Used in structural assemblies, industrial machinery, and fabrication projects.
Other Grades in ASTM A194 Alloy Steel Nuts :
Why Choose Our ASTM A194 Alloy Steel Nuts?
Industrial buyers require fastening solutions that deliver consistent performance and long-term reliability. We focus on supplying precision-manufactured alloy steel nuts that meet global industry standards.
Our Advantages
- Extensive stock availability
- Competitive pricing
- Strict quality control
- Custom manufacturing capabilities
- Fast delivery schedules
- Export-ready packaging
- Technical support from fastening specialists
- Compliance with international specifications
Whether you require A194 Gr 7 Heavy Hex Nuts Exporter services or bulk industrial supply, we can support projects of every scale.
Frequently Asked Questions
What are ASTM A194 Alloy Steel Nuts used for?
ASTM A194 alloy steel nuts are used in high-pressure and high-temperature applications such as refineries, power plants, petrochemical facilities, pressure vessels, and industrial piping systems.
What is the difference between ASTM A194 Grade 4 and Grade 7 Nuts?
Grade 7 nuts generally provide higher strength and are often paired with ASTM A193 Grade B7 bolts, while Grade 4 nuts are used for applications requiring high tensile performance under moderate to elevated temperatures.
What are Heavy Hex Nuts?
Heavy hex nuts have a larger width across flats and greater thickness than standard hex nuts, providing increased bearing surface and improved load distribution.
Are ASTM A194 Nuts suitable for high-temperature service?
Yes. ASTM A194 nuts are specifically designed for elevated temperature and high-pressure environments where conventional fasteners may fail.
Which industries commonly use ASTM A194 Alloy Steel Nuts?
Oil & gas, petrochemical, power generation, offshore, marine, chemical processing, heavy engineering, and refinery industries commonly use ASTM A194 alloy steel nuts.
Global Reach
ASC LLP 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 A194 Alloy Steel Nuts. 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.
Order ASTM A194 Alloy Steel Nuts from a Trusted Supplier in India
Looking for a reliable ASTM A194 Alloy Steel Nuts Supplier in India? We provide a comprehensive range of alloy steel fastening solutions including ASTM A194 Grade 7 Nuts, A194 Heavy Hex Nuts, ASME SA194 Alloy Steel Nuts, ASTM A194 Alloy Steel Grade 4 Nut Fasteners, and UNS G41400 Heavy Hex Nuts for domestic and international projects.
Contact our team today for technical assistance, pricing, product specifications, and bulk order requirements.
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.
