Stainless Steel Turbo Casing for Turbochargers

The Stainless Steel Turbo Casing for Turbochargers is a high-performance component designed to withstand the extreme thermal and mechanical stresses of automotive and industrial turbocharging systems. Manufactured from heat-resistant alloys such as Inconel 625 (UNS N06625), 321 (UNS S32100), or custom-developed ferritic stainless steels, these casings undergo precision investment casting and heat treatment to achieve superior strength and dimensional stability at continuous operating temperatures up to 900°C (1,652°F).

Engineered with aerodynamic volute profiles and reinforced bearing housings, the casings ensure efficient exhaust gas energy recovery while minimizing turbo lag, with surface finishes optimized for reduced friction and improved heat dissipation.

This casting part is turbo casing, a automotive part used for turbocharger. The internal leak-proof structure is formed by using the soluble core. The materials are high-strength and heat-resistant steel.

Extreme Temperature Resistance: Inconel 625 casings maintain tensile strength (≥ 760 MPa) at 800°C, resisting oxidation and thermal fatigue in high-boost automotive applications, while 321 stainless steel offers cost-effective performance in moderate-temperature industrial turbos (≤ 600°C/1,112°F).

Precision Balance Assurance: CNC-machined bearing journals (roundness ≤ 0.005mm) and dynamic balancing to G1.0 ISO 1940 standard reduce vibration-induced wear, ensuring smooth operation at shaft speeds up to 300,000 RPM.

Thermal Barrier Coatings: Optional ceramic coatings (zirconia-yttria) reduce heat transfer to the turbocharger housing, lowering surface temperatures by 50°C (90°F) and improving downstream component longevity.

Lightweight Design: Hollow-core casting technology reduces weight by 15% compared to forged alternatives, with FEA-optimized ribbing maintaining structural integrity under centrifugal forces (≥ 10,000g).

The turbo casing is the main housing of a turbocharger.It directs exhaust gases to drive the turbine, which in turn powers the compressor to increase air intake into the engine. The casing plays a critical role in enhancing engine performance, improving fuel efficiency, and reducing emissions by enabling higher air density for combustion.

Turbo casings are widely used in automotive, marine, and industrial engines to boost power output and efficiency. They are essential components in diesel and gasoline engines for cars, trucks, ships, motorsport,and heavy machinery,also applied in aerospace and power generation industries.

Automotive Turbocharging: Used in gasoline and diesel engines for passenger cars and commercial vehicles, with Inconel casings enduring the harsh cyclic thermal loads of stop-start urban driving.

Industrial Gas Turbines: Integral to small-scale power generation turbos, where 321 stainless steel casings resist oxidation from natural gas combustion products and ensure efficient energy recovery.

Aerospace Auxiliary Power Units (APUs): Forms the core of compact turbochargers in aircraft APUs, with heat-resistant alloys meeting FAA Part 25 flammability requirements and operating in high-altitude low-pressure environments.

Marine Propulsion: Deployed in marine turbochargers for diesel engines, with duplex-coated casings resisting saltwater corrosion and maintaining performance in humid, high-salt atmospheres.

Q: What is the maximum rotational speed these casings can withstand?

A: Standard designs support up to 250,000 RPM; custom high-speed variants (300,000+ RPM) use reinforced bearing seats and premium alloys like Waspaloy (UNS N07001).

Q: How are thermal expansion effects managed in the casing design?

A: Elastomeric mounts and floating bearing designs accommodate thermal growth, while material selection (e.g., low CTE Inconel 718) minimizes dimensional changes across the operating temperature range.

Q: Can the casing be coated for improved heat dissipation?

A: Yes—anodized aluminum coatings or metallic thermal sprays enhance heat transfer coefficients by 20%, ideal for applications requiring rapid cool-down after shutdown.