What Makes AISI 4130 Pipes Special?
The AISI 4130 alloy offers a rare balance between strength and flexibility. The presence of chromium increases hardness and corrosion resistance, while molybdenum enhances tensile strength and heat resistance. Together, these elements make the material capable of withstanding high-pressure operations without deformation or failure.
AISI 4130 pipes can be easily welded, machined, and heat-treated, which adds to their popularity in fabrication industries.
AISI 4130 Pipe Specifications
| Specification | Description |
|---|---|
| Grade | AISI 4130 / ASTM A519 Grade 4130 |
| Size Range | ½” to 12” NB |
| Form | Seamless, ERW, Fabricated |
| Ends | Plain End, Beveled End, Threaded |
| Surface Finish | Polished, Pickled, or Black Finish |
| Standards | ASTM, ASME, DIN, EN, API |
AISI 4130 Pipes – Chemical Composition
| Element | % Composition |
|---|---|
| Carbon | 0.28 – 0.33 |
| Chromium | 0.80 – 1.10 |
| Molybdenum | 0.15 – 0.25 |
| Manganese | 0.40 – 0.60 |
| Silicon | 0.15 – 0.35 |
| Sulfur | 0.040 Max |
| Phosphorus | 0.035 Max |
This precise composition ensures superior toughness and fatigue strength.
Mechanical Properties of AISI 4130 Pipes
| Property | Value |
|---|---|
| Tensile Strength | 560–670 MPa |
| Yield Strength | 460 MPa (Min) |
| Elongation | 20% |
| Hardness | 197–241 HB |
These mechanical properties make AISI 4130 suitable for applications involving dynamic loading, high stress, and vibration.
Types of AISI 4130 Pipes
AISI 4130 Seamless Pipes: Ideal for oil & gas and high-temperature services.
AISI 4130 ERW Pipes: Suitable for moderate pressure and structural applications.
AISI 4130 Hydraulic Pipes: Used in hydraulic systems for aircraft and drilling rigs.
AISI 4130 Round & Square Pipes: Employed in machinery, frames, and automotive systems.
Applications of AISI 4130 Pipes
The strength and reliability of AISI 4130 pipes make them suitable for a wide variety of applications:
Oil & Gas Drilling Equipment
Aircraft Landing Gear & Frames
Heat Exchangers & Pressure Vessels
Boiler Tubes & Power Generation Systems
Motorsport & Performance Vehicles
Chemical & Fertilizer Plants
Hydraulic Tubing & Tool Joints
In every industry, these pipes perform exceptionally well under challenging environments.
Advantages of Using AISI 4130 Pipes
High tensile and yield strength
Excellent machinability and formability
Superior corrosion and heat resistance
Cost-effective alternative to stainless steel
Easy to weld and fabricate
Long operational life with minimal maintenance
These benefits make AISI 4130 a go-to choice for manufacturers seeking high-performance yet economical materials.
AISI 4130 Pipe Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM | A519 Grade 4130 |
| EN | 25CrMo4 |
| DIN | 1.7218 |
| UNS | G41300 |
| BS | 708A25 |
These equivalents ensure easy global sourcing and compatibility across engineering codes.
AISI 4130 Pipe Heat Treatment Options
The performance of AISI 4130 pipes can be further optimized through controlled heat treatments:
Annealing: Improves ductility and machinability.
Normalizing: Enhances structural uniformity.
Quenching & Tempering: Increases toughness and fatigue resistance.
Proper heat treatment ensures consistency in mechanical properties and extended lifespan in harsh conditions.
AISI 4130 Pipe Price in India (Approximate)
| Type | Size | Price per Kg (INR) |
|---|---|---|
| Seamless Pipe | ½” to 8” NB | ₹250 – ₹450 |
| Welded Pipe | ½” to 12” NB | ₹180 – ₹350 |
| Hydraulic Pipe | Custom Sizes | ₹300 – ₹500 |
Note: Prices may vary depending on wall thickness, length, surface finish, and heat treatment condition.
Testing & Quality Assurance
To ensure reliability, AISI 4130 pipes undergo rigorous tests such as:
Hydrostatic Testing
Ultrasonic Inspection
Hardness Test
Tensile & Impact Testing
Third-Party Inspection Reports (TPI)
These quality checks guarantee compliance with ASTM and ASME standards.
Why Choose AISI 4130 Pipes for Industrial Use
If your project requires a material that can perform under pressure, temperature, and corrosive environments, AISI 4130 pipes are a perfect match. They deliver long-term durability, ease of fabrication, and lower lifecycle costs compared to higher-alloy steels. Their adaptability across industries makes them a reliable solution for modern engineering challenges.
Conclusion
AISI 4130 Pipes combine strength, toughness, and flexibility—qualities that are essential for critical engineering applications. Whether used in aerospace, oil & gas, or motorsports, these pipes deliver outstanding performance and value. For the best results, always source AISI 4130 pipes from reputed manufacturers and suppliers who provide test certificates and meet global standards.
