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Alloy Steel AISI 4140 Ferrule Fittings are precision-engineered components made from chromium-molybdenum low alloy steel, known for its excellent strength, toughness, and resistance to wear. These ferrule fittings ensure tight, leak-free connections in hydraulic and pneumatic systems operating under high-pressure conditions. The use of AISI 4140 provides superior hardness and fatigue resistance compared to carbon steels, making these fittings ideal for demanding applications in industries like oil and gas, petrochemical, aerospace, and marine. With precise machining and dimensional accuracy, 4140 ferrule fittings maintain exceptional sealing performance even under extreme temperatures and mechanical stresses.
Our Alloy Steel AISI 4140 Ferrule Fittings are designed to provide secure and reliable tube connections in instrumentation and process piping systems. Each fitting is manufactured under stringent quality standards to guarantee superior mechanical properties and corrosion resistance. The alloy’s balanced composition of chromium and molybdenum improves hardenability and mechanical stability. These ferrules are available in various configurations such as male connectors, female connectors, elbows, tees, unions, and cross fittings. They are compatible with both metric and imperial tubing sizes, ensuring seamless integration across different piping systems.
AISI 4140 Ferrule Fittings undergo precise heat treatment processes to enhance their tensile strength, ductility, and impact resistance. The fittings are suitable for high-stress and high-temperature applications, ensuring safety and long service life. The alloy’s excellent machinability allows easy customization for specialized dimensions and threading types. Surface finishes such as zinc plating, black oxide, or nickel coating are offered to enhance corrosion resistance in harsh environments. These treatments protect the fittings from oxidation, chemical exposure, and moisture, maintaining structural integrity over extended periods.
The superior design of Alloy Steel 4140 Ferrule Fittings ensures leak-tight performance even under repeated assembly and disassembly cycles. The ferrules compress perfectly to provide a strong grip on the tubing, preventing loosening due to vibration or thermal cycling. These fittings are commonly used in hydraulic lines, fuel injection systems, oil exploration rigs, and chemical process plants where reliability is critical. Their high yield strength and durability make them a preferred choice over standard stainless or carbon steel fittings in heavy-duty operations. Each fitting is tested for pressure integrity, dimensional precision, and surface finish before dispatch.
Alloy Steel AISI 4140 Double Ferrule Fittings come with precision-engineered ferrules and nuts, ensuring perfect alignment and connection. They comply with international standards like ASTM A322, AISI, SAE, and ISO, making them globally accepted across industries. The fittings can withstand pressure up to 6000 PSI depending on the size and wall thickness of the tubing. Their mechanical properties include high tensile strength (655 MPa min), yield strength (415 MPa min), and elongation of around 20%, ensuring superior performance under load-bearing applications. These characteristics make 4140 ferrule fittings a dependable choice for power generation and hydraulic systems.
Each Alloy Steel 4140 Ferrule Fitting is available with full traceability and certification, including material test reports (MTR) as per EN 10204 3.1 standards. The fittings are supplied in both annealed and quenched-tempered conditions based on customer requirements. In addition to standard configurations, custom designs can be produced to match specific operating parameters. Our manufacturing facility uses advanced CNC and precision machining technology to achieve tight tolerances and smooth surface finishes. This guarantees perfect fitment, minimal leakage risk, and enhanced overall system performance in complex installations.
Whether you require Alloy Steel AISI 4140 Single Ferrule or Double Ferrule Fittings, our products are engineered for exceptional performance and reliability. They are ideal for use in refineries, defense systems, offshore drilling, and industrial automation. We maintain a wide inventory of standard sizes and types to ensure quick delivery and flexibility for urgent projects. Our quality assurance team ensures that every fitting meets or exceeds customer expectations and international quality norms. Alloy Steel AISI 4140 Ferrule Fittings offer the perfect blend of strength, toughness, and sealing integrity for modern industrial systems.
Specification Table
| Specification | Details |
|---|---|
| Product Name | Alloy Steel AISI 4140 Ferrule Fittings |
| Material Grade | AISI 4140 / ASTM A322 / UNS G41400 |
| Type | Single Ferrule, Double Ferrule, Compression, Instrumentation, Hydraulic Fittings |
| Connection Type | Threaded, Welded, Compression, Male/Female Connector |
| Size Range | 1/8” OD to 2” OD (Custom Sizes Available) |
| Standards | ASTM A322, SAE 4140, ASME SB-473, DIN EN 10269 |
| Pressure Rating | Up to 6000 PSI (Depending on Size & Wall Thickness) |
| Temperature Range | -50°C to +480°C (-58°F to +896°F) |
| Hardness | 197 – 237 HB (Brinell) |
| Surface Finish | Black Oxide, Zinc Plated, Nickel Plated, Natural, Passivated |
| End Connections | NPT, BSP, BSPT, SAE, Metric Threads |
| Testing | Hydrostatic Test, Pneumatic Test, Pressure Integrity, Dimensional Accuracy |
| Applications | Hydraulic Systems, Instrumentation, Oil & Gas, Chemical Plants, Power Generation |
| Certification | EN 10204 3.1 / 3.2, NACE MR0175, ISO 9001:2015 |
Chemical Composition (Typical ranges for SSAISI 4140)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | Percentage (%) |
|---|---|
| Carbon (C) | 0.38 – 0.43% |
| Manganese (Mn) | 0.75 – 1.00% |
| Phosphorus (P) | Max 0.035% |
| Sulfur (S) | Max 0.040% |
| Silicon (Si) | 0.15 – 0.35% |
| Chromium (Cr) | 0.80 – 1.10% |
| Molybdenum (Mo) | 0.15 – 0.25% |
| Iron (Fe) | Balance |
Mechanical Properties (Typical)
| Property | Value | Condition |
|---|---|---|
| Tensile Strength | 655 MPa (95,000 psi) | Normalized & Tempered |
| Yield Strength | 415 MPa (60,000 psi) | Normalized & Tempered |
| Elongation | 20% (in 50 mm) | Typical |
| Reduction of Area | 45% | Typical |
| Hardness, Brinell (HB) | 197 – 237 HB | Annealed |
| Impact Strength (Charpy V-Notch) | 40 J at 20°C | Normalized |
| Modulus of Elasticity | 205 GPa (29,700 ksi) | Room Temperature |
| Poisson’s Ratio | 0.29 – 0.30 | Room Temperature |
| Density | 7.85 g/cm³ | At 20°C |
| Melting Point | 1416°C (2580°F) | Approximate |
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| UNS | G41400 |
| ASTM | A322 Grade 4140 / A29 Grade 4140 |
| SAE | 4140 |
| AISI | 4140 |
| EN | EN 1.7225 / 42CrMo4 |
| BS | 708M40 |
| DIN | 42CrMo4 |
| JIS | SCM440 |
| NF | 42CD4 |
| GOST | 38KhM |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Tube OD (inches) | Wall Thickness (mm) | OD (mm) | ID (mm) | Approx. Weight (kg/m) | Pressure Rating (PSI) |
|---|---|---|---|---|---|
| 1/8" | 1.00 | 3.18 | 1.18 | 0.07 | 6000 |
| 1/4" | 1.24 | 6.35 | 3.87 | 0.15 | 5500 |
| 3/8" | 1.65 | 9.52 | 6.22 | 0.27 | 5200 |
| 1/2" | 2.11 | 12.70 | 8.48 | 0.43 | 4800 |
| 5/8" | 2.41 | 15.88 | 11.06 | 0.60 | 4500 |
| 3/4" | 2.79 | 19.05 | 13.47 | 0.80 | 4200 |
| 1" | 3.38 | 25.40 | 18.64 | 1.20 | 3800 |
| 1-1/4" | 3.56 | 31.75 | 24.63 | 1.80 | 3600 |
| 1-1/2" | 3.68 | 38.10 | 30.74 | 2.45 | 3400 |
| 2" | 3.91 | 50.80 | 42.98 | 3.70 | 3000 |
Types Of Alloy Steel AISI 4140 Ferrule Fittingss and Tubes
Stainless Steel Ferrule Fitting
Monel 400 Ferrule Fitting
Hastelloy Ferrule Fitting
Nickel Ferrule Fitting
Super Duplex Ferrule Fitting
Duplex Ferrule Fitting
Inconel 600 Ferrule Fitting
Monel K500 Ferrule Fitting
Frequently Asked Questions (FAQ)
What are Alloy Steel AISI 4140 Ferrule Fittings?
Alloy Steel AISI 4140 Ferrule Fittings are high-strength pipe connection components manufactured from chromium-molybdenum alloy steel. They are designed for use in high-pressure hydraulic, pneumatic, and instrumentation systems where superior mechanical performance and corrosion resistance are required. These fittings ensure leak-free and durable joints between tubes or pipes in industrial environments.
What are the main advantages of using AISI 4140 Ferrule Fittings?
The main advantages include excellent tensile strength, fatigue resistance, and wear resistance. AISI 4140 material provides high toughness and durability under elevated temperatures. It performs better than standard carbon steels, offering longer service life and reliable sealing. Additionally, its machinability allows for precise and consistent manufacturing, ideal for critical applications.
Where are Alloy Steel AISI 4140 Ferrule Fittings commonly used?
These fittings are widely used in industries such as oil and gas, petrochemical, aerospace, power generation, and hydraulic systems. They are ideal for high-pressure pipelines, fuel injection systems, and chemical processing plants. Their strong construction ensures performance stability even under vibration and thermal cycling conditions.
What types of Alloy Steel 4140 Ferrule Fittings are available?
Alloy Steel 4140 Ferrule Fittings are available in various configurations such as single ferrule, double ferrule, male connector, female connector, elbows, tees, unions, bulkhead fittings, and cross fittings. Custom designs and thread types (NPT, BSP, BSPT, SAE) are also available to suit different installation requirements.
What is the pressure and temperature rating of AISI 4140 Ferrule Fittings?
Alloy Steel AISI 4140 Ferrule Fittings can handle working pressures up to 6000 PSI, depending on size and wall thickness. The operating temperature range typically extends from -50°C to +480°C (-58°F to +896°F). These ratings ensure suitability for high-performance hydraulic and chemical process systems.
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