Wear Resistant Surface Treatment That Pays-Off

Extend the service life of your screws and barrels with the right alloys to secure product quality, process stability and profitability sustainably.

Rely on Reiloys metallurgical expertise and manufacturing know-how

Get wear resistant surfaces precisely matched to the raw materials used and their additives

Enjoy longer service life of your barrels and screws and produce more profitabily.


Wear Protection Determines the Profitability of Your Plasticizing Unit

Insufficient wear protection can become a serious problem. Loss of material on screws and barrels causes internal leakage and fluctuations in the process. This can have a negative impact on product properties and profits. Even worse, wear can cause production downtime. With a powerful combination of metallurgical expertise and manufacturing know-how we assist you in counteracting wear, so you can produce more profitabily.

Wear: The mechanisms

Wear mechanisms in a plasticizing unit overlap: 

  • abrasion
  • adhesion
  • corrosion

The impact of these wear mechanisms is mainly dependent on the corrosivity, viscosity and hardness of the resin, plus the hardness, form and amount of added fillers. 

Equipment that has wear outside of the design specification can result in dimensional, aesthetic and stress related issues which ultimately has an impact on the OEE (Overall Equipment Efficiency)

Wear: The countermeasures

Based on our detailed knowledge of these wear mechanisms and how they interact, we can apply suitable countermeasures against wear on screws and barrels by employing material combinations and specific surface protection – so that your machines achieve an extremely long service life.

Powerful combination of metallurgical expertise and manufacturing know-how

Precisely matched to the requirements of the raw materials used and their additives

Verifiably longer barrel service life compared to the competition

Arrange a consultation now


Save Costs With Excellent Alloys

The wide range of alloys on the market can be confusing. Our experts guide you through the options and cooperate with you to find the alloy that is best suited for your production. 

Alloys for Barrels



Iron Based Alloy with primarily solidified Chrome Carbides, great wear package at an economical price.

Technical Data
Wear resistance +++
Corrosion resistance +++
Layer thickness 1.5 mm
Roughness Ra min. 0.2 – max. 0.8
Inner diameter 14 – 400 mm
Outside diameter max. 600 mm
Length max. 9,000 mm
Hardness at room temperature min. 65 HRC
Main alloy component Cr, Ni, Mo, B
Structural description Martensitic iron-based alloy with primarily solidified chrome carbides and Carbo-Boride Phases



Nickel Matrix Alloy with Tungsten Carbides with an exceptional corrosion and superior wear resistance.

Technical Data
Wear resistance+++++
Corrosion Resistance+++++
Layer thicknessmin. 1.0 mm
Roughness Ramin. 0.3 – max. 0.8
Inner diameter15 – 300 mm
Outside diametermax. 600 mm
Lengthmax. 9,000 mm
Hardness at room temperaturemin. 59 HRC
Main alloy componentW, Cr, B
Structural descriptionDispersive hardening of a highly corrosive resistant Ni-matrix alloy with thermally stable tungsten carbides



Nickel-Cobalt Alloy with Chromium Carbides results in an exceptional corrosion resistant package.

Technical Data
Wear resistance+
Corrosion Resistance+++++
Layer thicknessmin. 1.5 mm
Roughness Ramin. 0.2 – max. 0.8
Inner diameter15 – 105 mm
Outside diametermax. 350 mm
Lengthmax. 3,000 mm
Hardness at room temperaturemin. 55 HRC, Di > 60 mm min. 47 HRC
Main alloy componentCo, Cr, B
Structural descriptionNickel-cobalt base alloy with fine precipitation of primary solidified nickel borides and eutectically solidified chromium carbides

Specialty Wear and High Corrosion


Nickel Matrix Alloy with common Tungsten Carbides providing both wear, and high corrosion resistance.

Technical Data
Wear resistance ++++
Corrosion Resistance +++++
Layer thickness min. 1.0 mm
Roughness Ra min. 0.2 – max. 0.8
Inner diameter 18 – 165 mm
Outside diameter max. 290 mm
Length max. 3,000 mm
Hardness at room temperature min. 58 HRC
Main alloy component W, Cr, B
Structural description Dispersive hardening of a highly corrosive resistant Ni-matrix alloy with common tungsten carbides

Alloys for Screws

Welded Screws - Flight Weldments

Colmonoy ®56 

Nickel-Based Hard Surfacing Alloy – Typical Surfacing

Technical Data
Surface Hardness           46-51Rc
Elements          B, C, CR, Fe, Ni, Si

Colmonoy ®57

Nickel-Based Hard Surfacing Alloy

Technical Data
Surface Hardness           47-52 Rc
Elements           B, C, Cr, Fe, Ni, Si, W

Colmonoy ®83

Nickel-Chromium-Boron Matrix Alloy with Tungsten Carbide

Technical Data
Surface Hardness          50-55 Rc
Elements          B, C, Cr, Fe, Ni, Si, W

Stellite™ 6 Alloy

Cobalt-based alloy

Technical Data
Surface hardness           36-45 Rc
Elements          Co, Cr, W, C

Stellite™ 12 Alloy

Cobalt-based alloy

Technical Data
Surface Hardness45-51 Rc
ElementsCo, Cr, W, C

Through Hardened Tool Steels for Screws


Through Hardened Tool Steel – 9% Vanadium Carbide – 5.25% Chromium

Technical Data
Surface Hardness          54-56 Rc
Elements          C, Mg, Si, Cr, Mo, V

CPM® S90V (420V)

Through Hardened Tool Steel – 9% Vanadium Carbide – 14% Chromium

Technical Data
Surface Hardness          54-56 Rc
Elements          C, Cr, V, Mo

Special Alloys for Screws

Hastelloy C-276

Nickel-Molybdenum-Chromium Alloy with a small amount of Tungsten and Iron

Technical Data
Surface Hardness          Rb 87
Elements          Ni, Mo, Cr, Fe, W, Co, Mn, V, Si, P, C, S

Inconel® 718

Nickel Chromium composition

Technical Data
Surface Hardness     43-45 Rc
Elements     Ni, Ch, multiple trace elements

Only Reiloy Wear Protection Is Based on Hard Alloys Developed and Produced In-House with Our Own Chemicals Ensuring Consistent Top-Quality.

We have developed our own centrifugal technology for incorporation in our production facilities. This total production chain from a single source provides us with control over every process. This ensures unrivaled, consistent quality across a wide range of dimensions. To provide economical wear protection that is optimally matched to the raw materials used.

Metallurgical know-how and own material laboratory

Inhouse powder production based on own recipes

Unique Reiloy casting process for outstanding wear resistant surfaces

Know-how and experience to perfectly match the materials of screws and barrels

Advantage: ceramic phase

Reiloy USA's iron-based alloys R121 offers better wear protection due to its significantly higher concentration and the larger size of the ceramic phases, but not at greater costs.

Advantage: larger carbides

Our nickel-based alloys R241 and R115 and R231 feature carbides that are ten times larger than those normally found on the market, making them much more resistant to abrasive forces.

Premium Bimetallic

Our nickel-based alloy R241 is optimized so that its wear and corrosion protection is effective against particularly large numbers of attacks and permanently withstands even the most challenging raw materials.

Smart alternative

The Reiloy nickel-based alloy R239 offers market standard in Reiloy quality. And at the same time reduces wear on the
screw. Your advantage: Reliable fulfillment of all warranty requirements with greater margin leeway.

Process-optimizing surface

Reiloy USA wear protection is outstanding due to its unique surface quality and an extreme reduction in shrinkage cavities. The extremely stable honing quality of all Reiloy barrels across the entire range offers precisely the surface that is required for optimum wear protection.

Reiloy iron-based alloys in competitive comparison

Reiloy nickel-based alloys in competitive comparison


Reiloy USA wear protection highlights

"Our analyses have confirmed what is already taught in materials science studies: Wear protection depends not only on macro-hardness, but on the entire microstructure."

Dr Anna Rottstege

Head of Research & Development

Read the entire interview here


You can rely on

Personal consultation
Top wear protection
Optimized material pairings
On time delivery
Geometries matched to the requirement
Serial production according to customer drawings
Ideal cost-benefit ratio


Find the right wear protection with our experts

Our experts determine the optimum interaction between barrel and screw armor for each plasticizing unit and select the appropriate surface treatment. 

We are the only screw and barrel manufacturer to develop and produce the hard material alloys and even the powders required for wear protection in-house in our own materials laboratory. This means we offer expertise across the entire process that is unique in the industry.  

Discover Other Reiloy Products


Barrels of consistent quality that provide longer protection for your plasticizing units.


Screws that suit the application and withstand even the most wear-intensive plastics for a long time.

Valves & End Caps

Valves and End Caps are the key components to any injection molding setup.

Valves & End Caps