Should I choose cast basket or wrought/wire mesh basket?

If your furnace runs above 950°C, carries heavy or irregular loads, or operates on a continuous cycle with frequent thermal shock, a cast heat treatment basket is almost always the better choice. If your process runs at moderate temperature, needs fast air or gas flow around small parts, or you need to keep basket weight down to save energy, a wrought or wire mesh basket will usually serve you better and cost less upfront. The right answer depends less on preference and more on load weight, furnace type, and how many thermal cycles the basket has to survive.

Quick Comparison: Cast Basket vs Wire Mesh Basket

Both basket types are used across chamber, pit, pusher, vacuum and roller hearth furnaces, but they are built differently and behave differently under repeated heating and cooling. The table below summarizes the practical differences that matter most when specifying a basket.

Why Cast Baskets Handle Heavy and High-Temperature Loads Better

A cast basket is produced through investment casting or centrifugal casting, which allows the internal support ribs, corner joints and load-bearing sections to be formed as a single continuous structure rather than assembled from separate welded pieces. This matters because welded joints are usually the first point of failure in a furnace fixture. Under repeated heating past 1000°C and rapid cooling, a welded joint experiences concentrated thermal stress at the weld line, while a cast structure distributes that stress across a smoothly transitioned cross-section.

In practical terms, a cast basket built from heat-resistant alloys such as 1.4849 or 2.4879 can typically support several hundred kilograms of unevenly distributed parts without localized sagging, which is common when gear blanks, shafts, or forged components are loaded off-center. Centrifugal casting is particularly effective for producing dense, fine-grain wall sections that resist creep deformation at sustained high temperature, making it a preferred route for baskets used in continuous roller hearth or pusher furnaces where the fixture almost never fully cools down between cycles.

Situations Where a Cast Basket Is the Right Call

• Furnace operating temperature is consistently above 950°C to 1150°C
• Load weight per basket exceeds roughly 150 to 300 kg
• Parts are irregular in shape and create concentrated point loads
• The line runs continuously with minimal cool-down between charges
• Basket life is measured in years rather than months, and downtime for replacement is costly

Why Wire Mesh and Wrought Baskets Win on Weight and Airflow

Wire mesh and wrought baskets are fabricated from formed steel bar or wire that is welded into a grid or basket-weave structure. Because the wall sections are thin and open, these baskets carry far less thermal mass than a cast equivalent of the same size. That difference is not trivial: in gas carburizing or vacuum brazing furnaces, every kilogram of fixture mass has to be heated and cooled along with the workpieces, and a lighter basket can reduce the cycle time and the associated energy cost by a measurable margin.

The open mesh structure also allows quenching oil, protective gas, or vacuum atmosphere to reach the workpiece surface more evenly, which is exactly why mesh screens are standard equipment in vacuum brazing and low-pressure carburizing furnaces. For small fasteners, bearing components, or thin-walled parts that do not generate heavy point loads, a welded mesh basket is usually lighter on the crane, easier to load by robot arm, and less expensive to replace when it eventually wears out.

Situations Where a Wire Mesh Basket Makes More Sense

• Parts are small, light, and evenly distributed across the basket floor
• Fast gas or oil penetration is required, such as in carburizing or vacuum brazing
• Furnace temperature stays under roughly 950°C during normal operation
• Budget favors a lower upfront cost with more frequent replacement
• On-site repair by welding is preferred over waiting for a replacement casting

Featured Heat Treatment Basket Range

The comparison above becomes easier to apply once you see how these structures are actually built. The selection below shows both cast and welded mesh basket designs used across vacuum, roller hearth, and multi-purpose furnace applications.

Heat Treatment Basket Product Range

From stackable vacuum furnace baskets to welded mesh screens and combined charging baskets, each design is engineered for a specific furnace type, load profile and temperature range.

Stackable Heat Treatment Basket Cast Basket Metal Mesh Screen Wire Mesh 310S Welded Charging Basket Welded Basket Versatile Mesh Basket Wire Mesh Combined Charging Basket Cast + Welded

How the Basket Fits Into the Rest of the Furnace Load System

A basket rarely works alone. It sits on a heat-treatment base tray, is positioned by a heat-treatment fixture, and often travels through the furnace on furnace rollers or a hearth roll designed for cast link belt furnaces. When evaluating cast versus mesh construction, it helps to look at the whole loading system rather than the basket in isolation.

• Base trays and fixtures: Heat treatment base trays and welded heat treatment fixtures often use the same alloy grade as the basket so that thermal expansion rates match, preventing binding or cracking at contact points.
• Furnace transport components: On continuous lines, furnace rollers for continuous furnace operation and AFC furnace roller rails and rollers carry the basket through the heating zone, so basket weight directly affects roller wear and drive load.
• Radiant heat tubes: In gas-fired furnaces, radiant heat tubes control how evenly heat reaches the basket wall, which is one more reason mesh baskets are favored where uniform, fast heat transfer through an open structure is the priority.
• Support structures: Furnace piers and an AFC pusher head keep the basket aligned as it advances, particularly important for heavier cast baskets that can shift the load center if positioning is not precise.
• Auxiliary equipment: Components such as an Ipsen fan blade for atmosphere circulation also interact with basket design, since an open mesh basket allows fan-driven gas flow to reach the load more evenly than a dense cast structure.

For precision applications such as aerospace or bearing components, a precision casting basket built to tight support-point tolerances can reduce workpiece distortion by keeping spacing between internal supports below roughly 200 mm, which is a meaningful factor regardless of whether the outer shell is cast or welded.

Practical Selection Checklist

Use the checklist below as a quick reference when specifying a new basket for an existing or new furnace line.

Final Recommendation

There is no single basket that is universally better, only a better fit for a given furnace, load, and temperature profile. Heavy, irregular loads in high-temperature, high-cycle furnaces call for a cast basket built from a wear resistant, thermal-fatigue resistant alloy. Light, evenly distributed loads that need fast atmosphere penetration and lower thermal mass are better served by a welded wire mesh basket. Many production lines actually use both: cast baskets for the heaviest, longest-running furnaces, and mesh baskets for lighter, faster-cycling processes, matching each fixture to the job it does best.