Unicorn Metal Industries is a leading carbon steel fasteners manufacturer in India, offering durable
and
precision-engineered fastening solutions for structural, mechanical, and heavy engineering
applications. Carbon
steel fasteners are widely preferred for their high strength, durability, and ability to withstand
mechanical
stress in demanding environments.
Our range includes hex bolts, stud bolts, anchor bolts, threaded rods, U-bolts, and structural bolts
manufactured in accordance with ASTM, DIN, ISO, BS, and JIS standards. We also produce fasteners in
various
material grades such as ASTM A193 B7, ASTM A307, EN8, EN19, along with structural grades like S355,
S355J2, IS
4923 YST 355, IS 1161 YST 355, and ST52. These fasteners are part of our comprehensive industrial fasteners
range and are widely used in construction, heavy machinery, automotive, marine, and
infrastructure
applications.
Carbon steel fasteners are essential mechanical components used to securely join structural and
industrial
assemblies. Known for their high tensile strength and load-bearing capacity, they are widely used in
applications where durability and mechanical performance are critical. Their ability to withstand
high stress,
vibration, and heavy loads makes them suitable for a wide range of engineering environments.
These fasteners can be enhanced with surface coatings such as zinc plating or hot-dip galvanizing to
improve
corrosion resistance and service life. At Unicorn Metal Industries, they are manufactured using
controlled
forging, machining, and threading processes to ensure dimensional precision and consistent quality.
This ensures
reliable performance in demanding applications, similar to high-performance solutions such as Duplex Steel
Fasteners and Titanium Fasteners
used in
specialized environments.
| Specification | Range | Notes |
|---|---|---|
| Diameter | M3 – M56 | Custom sizes available |
| Length | 10 – 300 | Project dependent |
| Thread Type | Metric / UNC / UNF | Standard thread profiles |
| Material | Carbon Steel | Engineering grade |
| Surface Finish | Black Oxide, Zinc, HDG, Phosphate | Corrosion protection |
| Manufacturing Method | Forging / CNC Machining | Precision manufacturing |
| Heat Treatment | Optional | Strength enhancement |
| Standards | ASTM, DIN, ISO, BS, JIS | International compliance |
| Grade | Standard | Strength Level | Typical Applications |
|---|---|---|---|
| ASTM A193 B7 | ASTM | High | Petrochemical equipment |
| ASTM A193 B16 | ASTM | Very High | High temperature equipment |
| ASTM A307 | ASTM | Medium | Structural construction |
| EN8 | EN Standard | Medium-High | Automotive & machinery |
| EN19 | EN Standard | High | Heavy engineering |
| C45 | DIN | Medium | Mechanical assemblies |
| 40Cr | Chinese Standard | High | Industrial equipment |
| S355 | EN | High | Structural frameworks |
| S355J2 | EN | High | Low-temperature structural use |
| IS 4923 YST 355 | IS | High | Structural & hollow sections |
| IS 1161 YST 355 | IS | High | Engineering & structural use |
| ST52 | DIN | High | Heavy fabrication & construction |
Manufacturing precision is essential for carbon steel fasteners used in structural and mechanical applications. At Unicorn Metal Industries, fasteners are produced using controlled forging, machining, and threading processes with certified materials to ensure dimensional accuracy, proper fitment, and reliable performance.
| Manufacturing Process | Description | Application | Advantage |
|---|---|---|---|
| Hot Forging | Steel shaping at high temperature | Structural bolts | Strong grain structure |
| CNC Machining | Precision shaping and threading | Custom fasteners | High dimensional accuracy |
| Thread Rolling | Cold formed threads | Stud bolts | Improved fatigue resistance |
| Heat Treatment | Controlled heating and cooling | High tensile bolts | Increased hardness |
| Surface Finishing | Protective coatings | Outdoor structures | Corrosion resistance |
| Dimensional Inspection | Precision measurement | All fasteners | Consistent quality |
| Mechanical Testing | Strength verification | Engineering fasteners | Reliable performance |
| Grade | Carbon % | Manganese % | Silicon % | Sulfur % | Phosphorus % |
|---|---|---|---|---|---|
| EN8 | 0.36–0.44 | 0.60–1.00 | 0.10–0.40 | ≤0.05 | ≤0.05 |
| EN19 | 0.35–0.45 | 0.50–0.80 | 0.10–0.35 | ≤0.05 | ≤0.05 |
| ASTM A193 B7 | 0.37–0.49 | 0.65–1.10 | 0.15–0.35 | ≤0.04 | ≤0.04 |
| ASTM A193 B16 | 0.30–0.40 | 0.50–0.80 | 0.15–0.35 | ≤0.04 | ≤0.04 |
| C45 | 0.42–0.50 | 0.50–0.80 | 0.10–0.40 | ≤0.05 | ≤0.05 |
| 40Cr | 0.37–0.44 | 0.50–0.80 | 0.17–0.37 | ≤0.035 | ≤0.035 |
| Property | Typical Range | Unit | Importance |
|---|---|---|---|
| Tensile Strength | 600–1000 | MPa | Maximum load capacity |
| Yield Strength | 400–850 | MPa | Prevents deformation |
| Hardness | 200–320 | HB | Wear resistance |
| Elongation | 12–20 | % | Indicates ductility |
| Fatigue Resistance | High | — | Long service life |
| Impact Strength | Moderate | — | Shock resistance |
| Temperature Resistance | Up to 450 | °C | Industrial performance |
We manufacture a wide range of carbon steel fasteners designed for high strength, durability, and reliable performance across various industrial applications.
All fasteners are available in standard sizes as well as custom configurations based on engineering drawings and project specifications.
Carbon steel fasteners are widely used in industries where strong and reliable mechanical
connections are
essential for structural integrity and safety. In construction and infrastructure, they are used in
steel
frameworks, bridges, and industrial buildings requiring high load-bearing strength.
In automotive and machinery applications, these fasteners are used in engines, chassis components,
and equipment
exposed to vibration and stress. They are also utilized in marine, shipbuilding, and offshore
structures, as
well as in power plants and manufacturing facilities. Due to their strength, durability, and
versatility, carbon
steel fasteners remain a preferred choice across a wide range of engineering and industrial
applications.
Selecting a reliable manufacturer is essential when fasteners are used in structural assemblies or
critical
industrial equipment. Unicorn Metal Industries focuses on producing carbon steel fasteners that meet
strict
engineering standards, ensuring consistent quality, durability, and dependable performance across
industrial
applications.
Our manufacturing operations emphasize precision machining, material traceability, and controlled
production
processes to maintain dimensional accuracy and mechanical strength. We also specialize in custom
fasteners based
on technical drawings and project specifications, enabling engineers and manufacturers to obtain
precise
fastening solutions tailored to their specific requirements. We offer fasteners in a wide range of
international
and structural grades, including S355, ST52, and YST 355, ensuring suitability for diverse
engineering
requirements.
Maintaining consistent quality is essential in the manufacturing of industrial fasteners. At Unicorn
Metal
Industries, strict quality control procedures are followed at every stage to ensure compliance with
engineering
specifications and industry standards.
The process begins with raw material inspection to verify chemical composition and grade, followed
by
dimensional checks during production to ensure accuracy. Mechanical tests such as hardness and
tensile strength
are conducted to confirm performance. Only fasteners that meet all quality requirements are
supplied, ensuring
reliability in industrial applications.
We offer a complete range of industrial fasteners in multiple materials for corrosion resistance, high temperature performance, and strength-critical applications.
If you are searching for a reliable carbon steel fasteners manufacturers in India, the engineering
team at
Unicorn Metal Industries can assist with your requirements.
We manufacture both standard and custom carbon steel fasteners designed for industrial and
engineering
applications. Contact our team today to discuss your specifications or request a quotation for your
project.
