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Centrifugal Casting for Demanding Steel Tubing Applications

When standard tubing can’t meet your performance, size, or reliability requirements

Design engineers and manufacturers turn to centrifugal casting when off-the-shelf tubing falls short. Standard sizes, inconsistent material quality, limited wall thickness options, or premature failures can put projects at risk, especially in demanding environments.

Centrifugal cast steel tubes can provide:

  • High material integrity
  • Uniform wall thickness and concentricity
  • Longer service life with fewer failures
  • Predictable machining and material yield
  • Lower total cost of ownership

How centrifugal casting creates high-performance steel tubing

Specially designed for cylindrical parts, horizontal centrifugal casting begins with pouring molten metal in a rapidly spinning mold cavity. The spinning motion drives the denser metal to the outer diameter (OD) and impurities to the center, or inner diameter (ID).

Once the desired shape forms, impurities can be removed easily by machining and tubing cut to exact specifications. As an added bonus, the process delivers a high usable material yield. According to IPQC, 70-90% of the poured metal becomes part of the finished component. The mold can also be reused for future castings.

The process yields the ideal long-term tubing solution, especially when an expert metallurgist can tailor the alloys to meet the exact project requirements in terms of part strength, as well as corrosion, heat and pressure resistance.

In fact, when it comes to part strength, academic summaries on ScienceDirect Topics state that centrifugal casting increases the “actual mechanical properties of the casting by 10–15%” over static methods due to improved metal density and a uniform metallurgical structure.

*Note: Centrifugal casting may not be the best choice for thin-wall, small-diameter, or high-volume commodity tubing*

Centrifugal Casting Sizes and Materials

Tubing Size

Our centrifugal casting technology supports a wide range of weights, lengths, and diameters, making it well suited for medium- to heavy-wall tubing and large components that are difficult to source elsewhere.

Typical size capabilities include:

  • Weight: up to 15,000 pounds(8,164 kg) per casting
  • Maximum outside diameter: from 2.5 inches up to 44 inches (1,092.2 mm)
  • Lengths: up to 300 inches (7,620 mm)
  • Wall thickness: From 0.25 inches to 4 inches

Our precision machining allows engineers to design for performance without being constrained by standard mill sizes or excessive fabrication.

Material Options

With access to over 200 alloy variations, we can meet a wide range of customized alloy specifications, as well as produce standard ferrous grades, including:

  • Stainless steel grades
  • Duplex grades
  • PH (precipitation hardening) grades
  • Numerous high- and low-alloy steel grades

Our in-house metallurgical team can help match materials to operating conditions such as pressure, temperature, corrosion exposure, wear, and expected service life.

Reusable Steel Molds

We have over 1,000+ reusable steel molds to help you start production faster, often without any upfront tooling costs. Other benefits include:

  • No mold-related production delays
  • Creates less variation and waste
  • Works with all alloys
  • Highly repeatable and documentable

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Not quite ready yet? Keep reading to learn more!

Performance to Go the Distance

Here’s how centrifugal casting delivers predictable performance and improves your total cost of ownership:

Dimensional consistency

Centrifugal force evenly distributes molten metal during casting, producing a highly concentric tube with uniform wall thickness and predictable machining allowances.

  • Machined tolerances (±0.002 ID / ±0.005 OD), with surface finishes down to 16 RMS
  • High concentricity
  • Uniform wall thickness
  • Minimal part-to-part variation across production runs

Consistency matters more than extreme as-cast tolerances, especially for repeat production.

Extended component life

By producing single-piece tubular castings with consistent metallurgy, Spuncast helps reduce failure risk and extend component life. Centrifugal casting helps you avoid:

  • Premature cracking
  • Inconsistent material performance
  • Weld failures in fabricated tubing
  • Excessive machining scrap

Production reliability and scalability

By combining flexible capacity, repeatable processes, and integrated in-house capabilities, Spuncast helps support reliable production and long-term supply continuity. Centrifugal casting helps you avoid:

  • Production bottlenecks caused by tooling constraints or limited capacity
  • Schedule disruptions from excessive supplier handoffs
  • Variability between production runs that complicates planning
  • Delays tied to material availability, rework, or requalification

Value-Added Capabilities

To simplify sourcing and maintain tighter quality control, Spuncast offers integrated, in-house services that support the full lifecycle of the casting.

Metallurgical Expertise

Spuncast’s in-house metallurgical experts play a direct role in application-specific material selection, process control, and final validation. Their capabilities include:

  • Alloy selection guidance based on application demands
  • Chemistry control and verification
  • Microstructure evaluation
  • Failure analysis and troubleshooting support

Metal Testing

Our certified metallurgical lab can verify we are conforming to unique alloy specifications and applicable standards.

  • Chemical, mechanical and physical property testing
  • Produce to applicable ASTM A series standards; ASME when required.
  • Full documentation available upon request.

Heat Treating

In-house heat treating that dramatically improves metals and alloy properties, minimizing zero part-to-part variation and shortening your supply chain. We feature a variety of processes, ranging from 200-2000°F heat treatments:

  • Furnace annealing to restore ductility and release mechanical stress
  • Normalizing for metal uniformity and fine-grained structure
  • Air and water quenching for fully hardening material and improve mechanical toughness
  • Tempering and stress relief reduces dimensional changes

Precision Machining & Finishing

On-site, precision machining services ensure product quality and eliminates process variation.

  • Turning, boring, honing and milling capabilities
  • Long, single passes up to 15 feet in length
  • Turn diameters from 2.5” up to 44” in lengths up to 300”
  • Electronic-capture of operator-generated SPC data

Spuncast Shipping Services

Spuncast Shipping Services are designed to move centrifugally cast tubing directly from our facility to yours safely, efficiently, and cost-effectively.

  • Optimized freight planning for heavy and oversized components
  • Consolidated shipments to reduce total freight cost
  • Secure packaging designed to protect machined surfaces
  • Direct delivery to your plant, job site, or machining facility

The Big Question: How Does Centrifugal Casting Deliver Efficient Total Cost of Ownership?

Centrifugal casting reduces total cost of ownership by minimizing risk, waste, and downstream complexity across the full life of a component.

  • Longer service life and fewer failures reduce maintenance, downtime, and replacement costs.
  • Near-net tubular shapes and dimensional consistency limit excess machining, scrap, and rework.
  • Reusable steel molds with no repeat tooling charges eliminate ongoing pattern and setup costs.
  • Integrated casting, machining, testing, and shipping reduce supplier handoffs and schedule risk.
  • Predictable production with capacity flexibility supports recurring programs and volume changes.

When reliability and continuity matter, centrifugal casting helps control total cost over time.

Who We Help

Who we work with: Industries

Spuncast supports customers ranging from multi-national companies with global supply chains, to smaller manufacturers with regional distribution needs. We also provide products across a wide range of industries, including:
Industry Steel Tubing Applications
Oil and gas Pipelines and gathering systems Downhole tools and housings Offshore and subsea components Pressure-containing tubers
Energy & Power Generation Burner Nozzles Accumulators Turbine shafts Cuplings
Defense and Government Accumulators and pressure vessels Missile and propulsion system components Structural and load-bearing tubular parts Specialty pressure and containment systems
Water and Wastewater Processing Process piping and pressure tubing Treatment system components Pump housings and sleeves Corrosion-resistant tubular parts
Food Processing Sanitary process tubing Pressure-rated processing equipment Corrosion-resistant piping and sleeves Hygienic system components
Steel and aluminum Mill rolls and sleeves Furnace and heat-treatment components Wear-resistant tubular parts Process and transfer equipment
Heavy industrial machinery Hydraulic cylinders and housings Structural tubing for heavy equipment Pump casings, sleeves and valve components Pressure and mechanical system parts

Who we work with: People

Who in your organization will love centrifugal casting, and why:
Role Why Centrifugal Casting Matters to You
Design & Mechanical Engineers You can specify non-standard sizes, thicker walls, and custom alloys while relying on uniform wall thickness and concentricity for predictable performance and machining.
Manufacturing Engineers You get near-net tubular shapes with high usable material yield, helping reduce excess stock, scrap, and machining variability across production runs.
Maintenance & Reliability Leaders You reduce failure risk by eliminating welded joints and hidden defects, helping extend service life and improve long-term reliability.
Procurement & Sourcing Professionals You can control total cost of ownership through reusable tooling, more stable alloy pricing, and fewer downstream rework and supplier costs.
Operations & Supply Chain Managers You can support recurring programs and volume changes with flexible capacity, repeatable processes, and integrated Spuncast Shipping Services.

Why Spuncast: Over 50 years of centrifugal castings experience

Spuncast pairs a proven steel tubing process with integrated capabilities that support long part life, consistent quality, and total cost efficiency:

  • More than 50 years of centrifugal casting experience.
  • 200+ alloys backed by metallurgical expertise
  • Access to 1,000+ permanent mold
  • In-house heat treating, machining and shipping capabilities
  • Lifetime product warranty
  • Meet ASTM A series standards
  • ISO 9001 certified

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Frequently asked questions about centrifugal casting

Centrifugal Casting Basics

What’s the main benefit of using centrifugal casting?

The main benefit of centrifugal casting is material integrity. The spinning process produces a dense, uniform tube with fewer internal defects than many traditional casting methods. Impurities migrate toward the inner diameter and are removed during machining, resulting in stronger, more reliable parts.

This is why centrifugal casting is often chosen for pressure, fatigue, or long-service applications where hidden defects can’t be tolerated.

Anywhere steel tubing is used in demanding conditions, centrifugal casting is often part of the solution. Many customers turn to the process after discovering that standard seamless tubing can’t meet their pressure, wear, or material requirements.

Centrifugal casting is widely used for critical applications because it delivers consistent, repeatable results. The process eliminates internal cores, improves grain structure, and reduces voids, leading to predictable performance and long service life.

Engineers also trust the process because impurities are visible and machined away, reducing the risk of internal flaws that can cause unexpected failures.

Because the base material starts out in hollow cylinder form and not as a solid, impurities are easier to remove from the center creating an overall reduced material cost. You’ll also see fewer rejected parts which make the entire process more economical and less wasteful.
As a long-standing foundry, our molds are well-established and can be quickly set up with a shorter preparation time, reducing manufacturing costs and lead time.
Centrifugal casting allows for thicker walls, custom alloys, and non-standard sizes that are often unavailable in seamless tubing. It’s typically selected when performance, material flexibility, or availability matters more than commodity pricing.

Centrifugal casting may not be the best choice for thin-wall, small-diameter, or high-volume commodity tubing. In those cases, seamless or welded tubing can be more cost-effective if standard sizes and materials meet the application needs.

If off-the-shelf tubing already meets performance requirements, centrifugal casting usually isn’t necessary.

Vertical centrifugal casting is typically used for rings and shorter cylindrical parts, while horizontal centrifugal casting is designed for longer tubes. In each process, a single casting can often be cut into multiple finished components, improving yield. Spuncast only does horizontal casting.

Customers, Industries & Applications

Spuncast works primarily with engineers, operations leaders, maintenance teams, and procurement professionals. These customers are responsible for specifying materials, ensuring reliability, or sourcing critical tubing and components for industrial and manufacturing applications.
Spuncast serves a wide range of industries wherever high-integrity steel tubing is required. This includes oil and gas (mining), energy, defense, food processing, water processing, steel and aluminum production, and other heavy industrial applications.
Spuncast produces centrifugally cast steel tubing and tubular components such as cylinders, sleeves, rings, and custom parts. These components are commonly used in pumps, valves, mills, pressure systems, and heavy industrial equipment.

Capabilities

Centrifugal casting produces very consistent wall thickness, but final dimensions are typically achieved through machining. The uniformity of the casting allows for predictable machining results and reduced dimensional variation.

Most customers design with machining allowances in mind, knowing consistency matters more than tight as-cast tolerances.

On machined surfaces, Spuncast can typically hold tolerances of approximately ±0.002 inches on the inside diameter and ±0.005 inches on the outside diameter, with surface finishes down to 16 RMS.

By its nature, centrifugal casting produces highly concentric tubing. As the mold rotates, centrifugal force distributes the molten metal evenly, forming the tube wall uniformly from the inside diameter to the outside diameter.

The result is an extremely concentric ID—often within 0.010 inches or better—with minimal variation in wall thickness. When additional machining is performed, final dimensions are commonly held within a few thousandths of an inch, achieving even tighter control where required.

Yes. Centrifugal casting is particularly well-suited for large-diameter and heavy-wall tubing that can be difficult or expensive to source through other manufacturing methods.
Yes. Spuncast provides in-house heat treating services such as annealing, normalizing, and quenching. These processes help achieve consistent mechanical properties and ensure the material performs as intended in service.
Yes. Spuncast provides on-site machining and finishing services such as turning, boring, and honing. This reduces supplier handoffs and helps deliver parts closer to final dimensions.

Centrifugal casting typically delivers a high usable material yield, with roughly 70% of the poured metal becoming part of the finished component. This near-net shape reduces excess stock and limits the amount of machining required compared to many traditional casting methods.

Customers planning to machine in-house should account for this near-net shape. Spuncast also offers on-site machining to complete parts to final dimensions when desired.

Materials

Yes. Spuncast works with over 200 steel alloy variations, including carbon and alloy steels, stainless and duplex grades, and specialty materials. Our metallurgical team helps select the right alloy based on pressure, temperature, corrosion, and wear requirements.
Yes. Spuncast provides corrosion-resistant alloys including duplex stainless, high-chromium stainless, PH grades, and selected high-alloy steels. Alloy selection is based on the specific operating environment to ensure the right balance of corrosion resistance, strength, and cost.
Yes. Complex alloy specifications are met by tightly controlling melt chemistry and following documented testing and verification procedures. In-house analysis and certification ensure materials meet customer and industry requirements before machining or delivery.

Testing and Tracing

Yes. Spuncast regularly produces centrifugal cast steel tubing to applicable ASTM A series material standards. When required by the application, components can also be supplied to support ASME requirements.

Upon request with an order, Spuncast provides full material documentation, including chemical composition, test results, and complete traceability—from raw material through casting and mold identification—to support specification compliance.

Yes. Customers regularly conduct audits and on-site inspections at Spuncast. These include third-party and regulatory audits, such as ABS, ISO, and PED, as well as customer-specific audits based on internal quality requirements. Spuncast supports these visits as part of its commitment to transparency, quality control, and specification compliance.
Yes. Spuncast offers in-house non-destructive testing, including liquid penetrant and magnetic particle inspection. Ultrasonic testing is available on a limited basis, depending on application requirements. When radiographic or X-ray inspection is required, Spuncast works with qualified third-party providers to ensure specifications are met.
Yes. Every Spuncast casting is assigned a unique heat number that provides full material traceability. If that heat number is maintained on the part, Spuncast can trace it back to its original production records, which are retained indefinitely. Documentation can include material chemistry, mechanical test results, and other order-specific testing, supporting quality, compliance, and long-term accountability.

Production, Lead Times

Typical lead times for centrifugal cast tubing range from approximately 4 to 12 weeks, depending on part size, material, and complexity. Smaller or repeat components generally move faster, while larger or more specialized parts may require additional time for processing and machining.
Yes. Spuncast supports both recurring production programs and one-off or low-quantity orders. We work with manufacturers that have ongoing, higher-volume release schedules, while also accommodating smaller or single-quantity orders when timelines require. Our job-shop model, combined with production capabilities, allows us to scale up or down based on customer needs.
Yes. Spuncast maintains available production capacity to support changes in customer demand. As a general operating practice, we typically run at approximately 60% capacity, which allows us to scale production as volumes increase without disrupting quality or delivery performance.

Engineering Support & Long-Term Value

Spuncast does not provide part design services, but we do offer technical consultation early in the process. This includes guidance on alloy selection, metallurgical requirements, and sizing, and working from customer-supplied CAD files and models to support manufacturability and production planning.

Pricing

To provide an accurate quote, Spuncast typically needs finished dimensions, alloy requirements, quantities, machining needs, and details about the application. Understanding how the part will be used helps ensure the correct material, sizing, and process are selected, and prevents delays or revisions later in the quoting process.
Spuncast manages alloy cost volatility by sourcing material through a broad network of over 30 metal vendors across the United States. By balancing supplier inventories with our own material planning, we’re able to reduce exposure to short-term price swings and offer more consistent pricing. Many customers value this stability and return to Spuncast for repeat work as a result.
No. Spuncast does not charge upfront or repeat tooling costs for centrifugal cast tubing. We maintain ownership of the steel molds used in the casting process, which are specific to our equipment and reusable for thousands of pours. With an inventory of more than 1,000 mold sizes, customers benefit from existing tooling without pattern charges or recurring setup fees common in other casting methods.

Shipping

Yes. Spuncast offers in-house Foundry-to-Factory shipping services designed specifically for large, heavy, and high-value centrifugal cast tubing. We manage freight planning, packaging, and coordination to help ensure parts move safely and efficiently from our facility to the customer’s location.
Yes. In addition to in-house coordination, Spuncast works with a network of qualified external freight carriers. This allows us to select the most appropriate shipping method based on part size, destination, timeline, and customer requirements, while maintaining control over handling and delivery.
Yes. Spuncast ships throughout the United States, including Alaska and Hawaii, as well as internationally. We regularly support shipments across the lower 48 states and to destinations such as Canada, Mexico, South America, Europe, South Korea, Australia, and New Zealand. While we do not currently have customers in every region, we can support domestic and global shipping requirements as needed.

Count on Spuncast to supply you with first-rate steel tubing that will last longer, perform better, and perfectly complete your project.

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