Investment Casting
Socket
What is a Socket?
A Socket, also known as a Coupling, is a cylindrical fitting produced using investment casting, designed to connect two pipes in a straight line. The connection can be made using threaded ends, socket welds, or butt welds, depending on the system’s pressure, temperature, and maintenance needs.
Due to its compact design, smooth finish, and high dimensional accuracy, investment casting sockets are widely used in sanitary, chemical, marine, and precision-engineered fluid systems.
Key Features
Leak-Proof
Jointing
Durable
Construction
Easy Installation
& Removal
Wide
Compatibility
Corrosion
Resistant
Specifications
| Specification Category | Parameter / Feature | Details / Options |
|---|---|---|
| Size Range | Nominal Size | ½” to 4″ (custom sizes available) |
| Pressure Ratings | ANSI / ASME Class | Class 150, 300, 600, 900, 1500, 2500 |
| PN Ratings | PN6, PN10, PN16, PN25, PN40, PN64 | |
| Product Types | Investment Casting Fitting | Socket (Full, Reducing) |
| Material Options | Carbon Steel | ASTM A216 WCB |
| Stainless Steel | ASTM A351 CF8 / CF8M / CF3 / CF3M | |
| Alloy Steel | ASTM A351 CK3MCuN, CK20MCuN | |
| Nickel Alloy | Inconel, Monel | |
| Standards & Certifications | ASTM | ASTM A351, ASTM A182 |
| ASME / ANSI | ASME B16.11 | |
| MSS | MSS SP-79, MSS SP-83 | |
| European Standards | EN 10241, EN 10226 | |
| Certifications | ISO 9001, PED 2014/68/EU, NACE MR0175, CE Marked | |
| Design Features | Socket Type | Full Socket, Reducing Socket |
| Wall Thickness | As per ASTM / ASME standards, schedule 40, 80 | |
| End Connections | Female / Male Threaded, Flanged, Socket Weld | |
| Pressure Class | 2000#, 3000#, 6000#, 9000# | |
| Tolerance | Thread Tolerance | As per ASME B1.20.1 / ISO 7-1 |
| Coating & Surface Finish | Anti-Corrosion Coating | Passivation, Nickel Plating |
| Surface Finish | Mill Finish, Polished, Bead Blasted | |
| Testing & Inspection | Pressure Testing | Hydrostatic, Pneumatic |
| Non-Destructive Testing | Dye Penetrant (DPT), Magnetic Particle (MPI) | |
| Destructive Testing | Tensile, Hardness, Torque Test |
Dimensions
| Fitting Type | Nominal Size (NPS) | Outside Diameter (OD) | Socket Depth (D) | Thread Length (T) | Overall Length (L) | Weight per Piece |
|---|---|---|---|---|---|---|
| Socket (Full) | ½” | 21.3 mm | 12 mm | 20 mm | 55 mm | 200g |
| Socket (Full) | ¾” | 26.7 mm | 15 mm | 22 mm | 65 mm | 280g |
| Socket (Full) | 1″ | 33.4 mm | 18 mm | 25 mm | 75 mm | 360g |
| Socket (Full) | 1½” | 48.3 mm | 22 mm | 28 mm | 95 mm | 580g |
| Socket (Full) | 2″ | 60.3 mm | 25 mm | 30 mm | 110 mm | 780g |
| Socket (Full) | 3″ | 88.9 mm | 35 mm | 40 mm | 140 mm | 1.2kg |
| Socket (Full) | 4″ | 114.3 mm | 45 mm | 50 mm | 175 mm | 1.8kg |
| Socket (Reducing) | 1″ × ½” | 33.4 / 21.3 mm | 20 mm | 22 mm | 75 mm | 350g |
| Socket (Reducing) | 2″ × 1½” | 60.3 / 48.3 mm | 25 mm | 30 mm | 110 mm | 1.0kg |
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 485 – 750 | MPa (Carbon Steel, Stainless Steel, Alloy Steel, Nickel Alloys) |
| Yield Strength | 170 – 450 | MPa |
| Hardness | 120 – 200 | HB (Brinell) |
| Elongation | ≥ 20 – 30 | % |
| Density | 7.8 – 8.0 | g/cm³ (Carbon Steel), 7.9 – 8.0 g/cm³ (Stainless Steel) |
| Impact Toughness | ≥ 27 – 70 | J (Charpy, grade-dependent) |
| Modulus of Elasticity (E) | ~200 | GPa |
| Fatigue Strength | 250 – 450 | MPa |
| Corrosion Resistance | Good to Excellent (SS > CS > Alloy Steel > Nickel Alloys) | – |
| Thermal Conductivity | 15 – 50 | W/m·K |
| Coefficient of Thermal Expansion | 11 – 17 ×10⁻⁶ | /°C |
| Yield Ratio (YS/UTS) | 0.40 – 0.65 | – |
| Poisson’s Ratio | 0.27 – 0.30 | – |
| Brinell Hardness Range | 120 – 200 | HB |
| Surface Finish | Mill Finish, Polished, Bead Blasted | – |
| End Connections | Female / Male Threaded, Flanged, Socket Weld | – |
| Operating Temperature Range | -46 to 600 | °C (material-dependent) |
| Pressure Rating | Class 150, 300, 600, 900, 1500, 2500 | ASME B16.11 |
Chemical Composition
| Element | SS 304 | SS 304L | SS 316 | SS 316L |
|---|---|---|---|---|
| Chromium (Cr) | 18.0 – 20.0 | 18.0 – 20.0 | 16.0 – 18.0 | 16.0 – 18.0 |
| Nickel (Ni) | 8.0 – 10.5 | 8.0 – 12.0 | 10.0 – 14.0 | 10.0 – 14.0 |
| Carbon (C) | ≤ 0.08 | ≤ 0.03 | ≤ 0.08 | ≤ 0.03 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 |
| Iron (Fe) | Balance | Balance | Balance | Balance |
| Molybdenum (Mo) | — | — | 2.0 – 3.0 | 2.0 – 3.0 |
Applications of Investment Casting Sockets
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
Are sockets available in reducing sizes?
Can these be used in high-pressure systems?
What end types do you offer for sockets?
Are they suitable for sanitary or hygienic applications?
