CPM® MagnaCut Steel
The Benchmark for Balanced Knife Steel Performance
Exceptional toughness. Excellent corrosion resistance. Strong edge retention.
Explore CPM® MagnaCut
CPM® MagnaCut is a premium stainless steel engineered by metallurgist Dr. Larrin Thomas to achieve an exceptional balance of toughness, wear resistance, edge retention, strength, and corrosion resistance.
Its ability to deliver high edge retention and strength without compromising outstanding corrosion resistance is a combination rarely achieved in stainless cutlery steels. This unique performance profile has made CPM® MagnaCut one of the most sought-after materials in the knife industry, particularly for premium, high-performance blades.
Exceptional Toughness High resistance to chipping, breaking, impact, and lateral stress.
Excellent Corrosion Resistance Strong stainless performance in wet, humid, and high-use environments.
Strong Edge Retention Long-lasting cutting performance with practical sharpening behavior.
What Is CPM® MagnaCut?
CPM® MagnaCut was developed by Dr. Larrin Thomas to achieve an exceptional combination of toughness, wear resistance, corrosion resistance, edge stability, strength, and cutting performance.
The grade was originally produced through the Crucible Particle Metallurgy process associated with the CPM® name. Powder metallurgy creates an ultra-fine, uniform microstructure that enhances both performance and consistency.
MagnaCut's alloy design minimizes the formation of large chromium carbides in the heat-treated microstructure. Instead, it relies primarily on fine vanadium- and niobium-rich carbides.
Keeping chromium out of large carbide formations leaves more chromium available in the steel matrix to support corrosion resistance while the fine carbide structure contributes to toughness, edge stability, wear resistance, and predictable cutting behavior.
The result is a high-performance stainless steel capable of delivering excellent corrosion resistance without sacrificing the toughness and edge performance demanded by premium knife makers and users.
~10.7% Chromium in Solution Supporting Stainless Performance
Fine Uniform Powder Metallurgy Microstructure
60–63 Typical Recommended Aim Hardness Range
PM Premium Powder Metallurgy Stainless Steel
Why CPM® MagnaCut Stands Out
Traditional stainless cutlery steels often require compromises between toughness, wear resistance, corrosion resistance, and sharpening behavior. MagnaCut was specifically engineered to improve that balance.
High Performance Without Sacrificing Corrosion Resistance MagnaCut delivers high edge retention and strength while maintaining outstanding corrosion resistance, a performance combination that is difficult to achieve in traditional stainless cutlery steels.
Designed for Premium Knife Applications Its combination of toughness, edge retention, corrosion resistance, and manageable sharpening has made MagnaCut a highly sought-after steel for high-end kitchen knives, EDC knives, outdoor blades, and other demanding cutting tools.
Why MagnaCut Changed the Performance Balance
MagnaCut was engineered to reduce the traditional compromises between stainless corrosion resistance, toughness, wear resistance, and edge retention.
Fine Carbide Structure MagnaCut uses fine vanadium and niobium carbides rather than relying on large chromium carbides. The resulting fine, stable microstructure supports toughness, edge stability, wear resistance, and consistency.
Stainless Without the Usual Tradeoff With approximately 10.7% chromium in solution, MagnaCut provides excellent protection against rust in wet, humid, and high-use environments without sacrificing the toughness often lost in conventional stainless designs.
Practical Cutting Performance Its balanced carbon, vanadium, and nitrogen content contributes to strong edge retention and wear resistance while maintaining more practical sharpening behavior than many ultra-high-wear steels.
The Powder Metallurgy Process Behind MagnaCut
CPM® MagnaCut is now produced using Erasteel's state-of-the-art powder metallurgy process, a system that has been continuously refined since its introduction in 1969.
Erasteel operates two of the world's largest metal powder atomizers and is recognized as a global leader in powder metallurgy innovation. The company pioneered the ESH, or Electro Slag Heating, process for gas-atomized powders and has continued to advance powder metallurgy through improvements in cleanliness, process control, and microstructural consistency.
ESH — Electro Slag Heating Erasteel's ESH process supports exceptionally clean gas-atomized powder production and is part of the company's long history of powder metallurgy development.
Enclosed Tundish Pouring Enclosed pouring helps protect molten material during processing and contributes to the cleanliness and consistency required for demanding powder metallurgy grades.
Synthetic Slag Covers Synthetic slag covers are among the process refinements used to help maintain cleanliness and control during atomization.
Fine, Uniform Carbide Structure These technologies and other proprietary refinements produce a fine, uniform carbide structure on par with the original CPM® process, supporting excellent grindability and the high-performance characteristics expected from premium PM steels.
Erasteel's exceptionally clean processing route supports demanding applications across military, aerospace, Formula 1, advanced engineering, and traditional tooling markets.
Industries supported by Erasteel's advanced powder metallurgy capabilities include:
- Military
- Aerospace
- Formula 1
- Advanced Industries
- Tooling
For CPM® MagnaCut, this level of process control translates to increased toughness, superior edge retention, excellent grindability, consistent microstructure, and reduced risk of chipping—important advantages for high-end blades and cutting tools.
Current MagnaCut Production
Same MagnaCut. Same performance.MagnaCut production has transitioned to Erasteel. Chemistry targets and processing were calibrated using previous MagnaCut heats to maintain the performance and heat-treat behavior knife makers and manufacturers already know.
Corrosion Resistance Current testing shows the stainless corrosion performance expected from MagnaCut is maintained.
Heat-Treat Compatibility Existing MagnaCut heat-treatment practices remain compatible with current production.
Toughness Testing of current material shows strong toughness at typical blade hardness levels.
Consistency Chemistry and processing are closely controlled to maintain continuity in MagnaCut behavior and performance.
Learn more in our MagnaCut Steel Production Update .
CPM® MagnaCut at Niagara Specialty Metals
From heavy starting stock to finished sheet and processed material, CPM® MagnaCut moves through multiple stages at Niagara Specialty Metals before reaching knife makers and manufacturers.
Key Properties of CPM® MagnaCut
Corrosion Resistance CPM® MagnaCut achieves stainless-level corrosion resistance through its optimized combination of chromium, vanadium, and nitrogen. With approximately 10.7% chromium in solution, it provides excellent protection against rust in wet, humid, or high-use environments without sacrificing toughness—a common tradeoff in many traditional stainless steels.
Toughness One of MagnaCut's standout qualities is its exceptional toughness, which exceeds that of many other steels offering high edge retention. This durability allows the steel to withstand impact, lateral stress, and demanding use, making it well suited for hard-use knives and professional cutting tools where resistance to chipping or breakage is critical.
Wear Resistance & Edge Retention MagnaCut's balanced composition of carbon, vanadium, and nitrogen creates a fine, stable carbide structure that delivers long-lasting wear resistance and excellent edge retention. As a result, MagnaCut performs consistently through prolonged cutting tasks and is a preferred choice among premium knife makers.
Ease of Sharpening Despite its high wear resistance, CPM® MagnaCut remains surprisingly manageable to sharpen compared with many ultra-hard or ultra-high-wear steels. It provides a practical balance between edge longevity and maintenance for both end users and knife makers.
Applications of CPM® MagnaCut
CPM® MagnaCut is widely used throughout the knife industry thanks to its exceptional combination of corrosion resistance, edge retention, toughness, and practical sharpening behavior. It is a top choice for high-end kitchen knives, outdoor and survival blades, everyday carry knives, and other premium cutting tools.
Common applications include:
Cutlery & Kitchen Tools Long-lasting edge retention and excellent corrosion resistance make MagnaCut ideal for culinary knives, food-preparation tools, and premium kitchen cutlery.
EDC & Folding Knives Its balanced combination of edge retention, toughness, corrosion resistance, and sharpening behavior makes MagnaCut an excellent choice for premium everyday carry knives.
Outdoor & Survival Tools With outstanding toughness and reliability, MagnaCut performs well in harsh environments and is well suited for survival knives, field tools, hunting blades, and camping gear.
Hunting & Field Knives Strong edge stability, corrosion resistance, and resistance to chipping provide dependable performance during demanding field use.
Precision Cutting Tools The fine, uniform grain and carbide structure achieved through powder metallurgy allows MagnaCut to excel where cutting accuracy, stability, and reliability are essential.
Premium Cutting Tools MagnaCut's balanced properties also make it suitable for professional and specialty cutting applications where both performance and reliability are priorities.
Why Choose CPM® MagnaCut?
If you're looking for a steel that performs reliably across a wide range of demanding conditions, CPM® MagnaCut is an exceptional choice. Whether it's a kitchen knife that must retain a sharp edge through daily use or an outdoor tool built to endure harsh environments, MagnaCut offers consistent, high-level performance.
Its rare combination of toughness, corrosion resistance, wear resistance, edge retention, strength, and practical sharpening behavior sets it apart from many other premium stainless steels.
How Niagara Processes CPM® MagnaCut
Niagara Specialty Metals helped bring MagnaCut from an experimental alloy into usable sheet and plate for the knife industry. Today, our team continues to process MagnaCut into material ready for custom knife makers and production manufacturers.
MagnaCut arrives in heavy starting sections for conversion into finished sheet and plate.
Need custom knife blanks? Niagara can support precision cutting from customer-supplied DXF files for qualifying orders and applications.
CPM® MagnaCut Heat Treatment at a Glance
Heat treatment can be adjusted for the intended blade design and performance requirements. Niagara's data sheet provides complete technical guidance; the following is a general baseline.
Austenitize 2050°F recommended baseline
Quench Cool below approximately 125°F
Double Temper 350°F, minimum two hours each temper
Aim Hardness Approximately 60–63 HRC
A freezing treatment may be added after quenching. Always review the complete data sheet and determine the appropriate heat-treatment process for the specific blade design and application.
Explore More About CPM® MagnaCut
Explore MagnaCut's metallurgy, knife performance, innovation, production history, and comparisons with other high-performance steels.
CPM® MagnaCut at Niagara Specialty Metals
Niagara Specialty Metals has been part of the MagnaCut story from its early development, helping roll experimental material into usable sheet and plate and supporting knife makers as the alloy entered the market.
Today, we continue to process and supply CPM® MagnaCut for custom knife makers, production manufacturers, professional cutting-tool applications, and other demanding uses.
Our CPM® MagnaCut processing and supply capabilities include:
- Specialty Rolling
- Sheet & Strip
- Grinding
- Laser Cutting
- Waterjet Cutting
- Custom Cutting
- Small-Quantity Availability
- Technical Support
Whether you are developing a premium kitchen knife, an EDC blade, an outdoor or survival tool, or another high-performance cutting application, our team can help with MagnaCut material availability and processing requirements.