Investment Casting Bushing
What are Investment Casting Bushing?
A Bushing, also known as a reducing bushing, is a precision-engineered pipe fitting designed to connect two pipes of different sizes by reducing the bore. Manufactured using the investment casting process, bushings ensure dimensional accuracy, smooth surface finish, and tight tolerance for critical flow applications.
These fittings are commonly used in instrumentation systems, fluid handling setups, chemical pipelines, and process control environments where space, alignment, and size transition are crucial.
Key Features
- Size Reduction Function – Connects larger and smaller diameter threads securely.
- Compact Hex Design – Easy to tighten using a wrench or spanner.
- Smooth Finish – Investment casting ensures excellent sealing and thread integrity.
- Versatile Material Options – Available in stainless steel, duplex, and special alloys.
- Standards Compliant – Follows ASME, MSS-SP, DIN, and ISO norms.
Specifications
Mechanical Properties
Chemical Composition
Equivalent Grades
Weight Chart
Specifications
| Parameter | Details |
|---|---|
| Sizes | ⅛" x ¼" to 2" x 1" |
| Thread Standards | BSP / NPT / BSPT |
| Pressure Rating | Class 2000 / 3000 |
| Material Options | SS 304, SS 316, Duplex, CF8, CF8M |
| Standards | ASME B16.11, MSS-SP-95, DIN 2950 |
| Manufacturing | Investment Casting + CNC Machining |
| Property | Typical Value |
|---|---|
| Tensile Strength | 485 – 750 MPa |
| Yield Strength | 250 – 450 MPa |
| Elongation | 20% – 30% |
| Hardness | 125 – 250 HB |
| Temperature Range | -46°C to +600°C |
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 14.0 |
| Molybdenum (Mo) | 2.0 – 3.0 (in 316/CF8M) |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
| Standard | Equivalent Grades |
|---|---|
| ASTM | A351 CF8 / CF8M, A182 F304 / F316 |
| ASME | B16.11 |
| MSS-SP | SP-95 |
| DIN | 2950 / 2955 |
| ISO | ISO 4144 |
| Bushing Type | Size (inches) | Weight per 100 pcs (kg) |
|---|---|---|
| Hex Bushing | ½" x ¼" | 6.80 |
| Hex Bushing | 1" x ½" | 9.50 |
| Hex Bushing | 2" x 1" | 13.40 |
Applications of Investment Casting Bushing
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What’s the purpose of a bushing in a pipeline?
A bushing helps transition between different pipe sizes while maintaining flow and pressure integrity.
Are investment cast bushings better than machined ones?
Yes, they offer better surface finish, tighter tolerances, and are cost-effective for complex profiles.
Can bushings handle high pressure?
Yes. Pressure class 3000-rated bushings perform reliably under high-pressure conditions.
Do you offer bushing in Duplex or Super Duplex?
Absolutely. Custom grades like Duplex 2205, Super Duplex 2507, and Nickel Alloys are available.
