In recent years, an increasing number of food processing knife manufacturers have turned their attention to 420 series and 5Cr15MoV stainless steel. This trend is particularly evident in kitchen knives, food processing machine blades, and medical cutting instruments.

As a material supplier serving a large number of knife manufacturers worldwide, DSM is frequently asked questions such as:

"What makes these two materials so popular?"
"Should I choose 420 stainless steel or 5Cr15MoV?"

In this article, we will explain why these materials have become mainstream choices for food processing knives from the perspective of a stainless steel supplier.

1. What Challenges Do Food Processing Knives Face?

Unlike general industrial cutting tools, food processing knives operate in demanding environments and must withstand several key challenges.

1. High-Frequency Cutting Wear

Food processing knives may perform thousands or even tens of thousands of cutting cycles every day.

If wear resistance is insufficient:

• The cutting edge becomes dull quickly.

• Frequent sharpening is required.

• Production efficiency decreases.

2. Moist and Corrosive Environments

Food processing facilities commonly expose knives to:

• Water

• Salt

• Acidic food residues

• Cleaning agents

• Disinfectants

Poor corrosion resistance can result in:

• Surface rust spots

• Food safety concerns

• Reduced service life

3. Strict Hygiene and Food Safety Requirements

Materials used in food-contact applications must be:

• Easy to clean

• Resistant to contamination buildup

• Non-toxic

• Compliant with food-contact regulations

4. Cost Control Pressure

Manufacturers must balance:

• Reliable performance

• Product quality

• Competitive production costs

As a result, the ideal knife steel must offer the best balance between performance and affordability.

This is exactly where 420 stainless steel and 5Cr15MoV stainless steel stand out.

2. 420 Stainless Steel: Still the Mainstream Material for Food Knives

The 420 series is one of the most widely used martensitic stainless steel families in the global knife industry.

Common grades include:

• 420J1

• 420J2

• 420U6

• 4Cr13

Its long-term popularity comes from several key advantages.

✅ Good Corrosion Resistance

With chromium content typically above 12%, properly heat-treated 420 stainless steel forms a stable passive layer that resists:

• Moisture

• Food acids and alkalis

• Daily cleaning chemicals

For most food processing applications, its corrosion resistance is more than sufficient.

Adequate Hardness

After heat treatment:

• 420J2 can reach HRC 50–54

• 4Cr13 can reach HRC 54–56

This level of hardness meets the requirements of most food-cutting operations.

Cost-Effective Manufacturing

Compared with premium powder metallurgy steels:

• Raw material cost is lower

• Heat treatment technology is mature

• Machining is relatively easy

This makes 420 stainless steel ideal for large-scale production.

Food-Grade Compliance

420 stainless steel that complies with GB 4806.9-2016 can meet food-contact material requirements, making it suitable for food processing applications.

Typical Applications

• Meat processing knives

• Slaughterhouse knives

• Standard kitchen knives

• Food machinery blades

• Industrial cutting knives

Especially suitable for cost-sensitive, high-volume production.

3. Why Are More Manufacturers Upgrading to 5Cr15MoV?

As the food industry demands longer knife life and higher cutting performance, more manufacturers are upgrading to 5Cr15MoV stainless steel.

Many international knife brands also use it as a core blade material.

What Is 5Cr15MoV?

5Cr15MoV is an upgraded martensitic stainless steel based on the 420 family.

Typical composition includes:

• Approximately 0.5% Carbon

• Around 15% Chromium

• Added Molybdenum (Mo)

• Added Vanadium (V)

These alloying elements significantly improve overall performance.

Better Corrosion Resistance

Molybdenum enhances:

• Pitting corrosion resistance

• Chloride corrosion resistance

This makes 5Cr15MoV particularly suitable for:

• Meat processing

• Seafood processing

• Aquatic product processing

• High-humidity production environments

Superior Wear Resistance

Vanadium forms fine hard carbides within the steel matrix.

Benefits include:

• Longer edge retention

• Reduced wear rate

• Less frequent blade replacement

For continuous production lines, these advantages translate directly into lower operating costs.

Practical testing shows that wear rates can be reduced by approximately 40–50% compared with conventional stainless steels.

Better Balance of Hardness and Toughness

After proper heat treatment, 5Cr15MoV typically reaches:

HRC 56–59

This is approximately 3–4 HRC points higher than standard 420 grades while maintaining good toughness.

The result is a blade that remains sharp while resisting chipping.

Stronger Product Competitiveness

For knife brands and OEM manufacturers, 5Cr15MoV offers:

• Longer service life

• Better customer satisfaction

• Lower warranty claims

• Enhanced market competitiveness

Compliance with International Standards

5Cr15MoV is often associated with:

• AISI 420MoV

• DIN 1.4116

It can also comply with GB 4806.9-2016 food-contact material requirements, helping manufacturers expand into both domestic and international markets.

Typical Applications

• Premium kitchen knives

• Medical scissors and surgical instruments

• Meat processing equipment

• Seafood processing equipment

• Commercial kitchen knives

• High-frequency food processing blades

4. How to Choose Between 420 and 5Cr15MoV?

Selection Recommendations

If Cost Control Is Your Priority

Consider:

• 420J2

• 420U2

• 4Cr13

These grades are ideal for large-volume production and cost-sensitive projects.

If Knife Life and Performance Are Your Priority

Choose:

5Cr15MoV

Especially for:

• Meat processing equipment

• Seafood processing equipment

• Commercial kitchen knives

• Critical food machinery blades

The choice is not about which material is "better," but rather which material is "better suited" to your application.

5. What Should Knife Manufacturers Pay More Attention To?

Many buyers focus solely on price.

In reality, knife performance is often determined by factors that are frequently overlooked.

1. Steel Cleanliness

Higher cleanliness means:

• Lower chipping risk

• Better heat treatment consistency

Non-metallic inclusions in low-quality steel can lead to premature edge failure.

2. Heat Treatment Compatibility

The same steel grade can perform very differently depending on the heat treatment process.

DSM not only supplies steel but also provides recommendations covering:

· Annealing

· Hardening

· Tempering

to help customers maximize material performance.

3. Thickness, Flatness, and Dimensional Accuracy

For industrial food processing blades:

· Thickness tolerance

· Flatness

· Surface finish

all directly affect assembly precision and cutting performance.

4. Supply Stability

For manufacturers running continuous production lines, stable material quality and reliable delivery schedules are often more valuable than occasional low prices.

6. What Can DSM Do for You?

After years of serving knife manufacturers, we have found that customers are often not asking:

"Which steel is better?"

Instead, they are asking:

"Which steel is best suited to my application, process, and budget?"

Even when using the same steel grade, differences in supplier quality, batch consistency, and heat treatment support can significantly impact final knife performance.

DSM specializes in martensitic stainless steel solutions for precision cutting applications and offers:

✔ Customized Material Recommendations

Based on:

· Knife type

· Cutting material

· Usage frequency

· Budget requirements

we recommend the most suitable 420 or 5Cr15MoV solution.

✔ Consistent Material Quality

Strict composition control and batch management ensure:

· High cleanliness

· Stable mechanical properties

· Reliable processing performance

✔ Professional Heat Treatment Support

We provide optimized heat treatment recommendations tailored to specific knife designs and steel grades.

✔ Food Safety Compliance Support

Material certifications can be provided to support compliance with food-contact regulations, including GB 4806.9-2016 requirements.

✔ Long-Term Technical Assistance

From material selection to mass production, our technical team works closely with customers to solve practical manufacturing challenges.

7. Conclusion

The food processing knife industry is evolving from simply being functional to becoming more efficient, compliant, and performance-driven.

420 stainless steel continues to dominate entry-level and mid-range applications thanks to its excellent balance of performance and cost.

Meanwhile, 5Cr15MoV has become a benchmark material for premium food processing knives due to its higher hardness, superior wear resistance, and enhanced corrosion resistance.

The growing adoption of these two materials reflects both technological progress and the increasing demand for specialized material solutions within the food processing industry.

If you are selecting stainless steel for food processing knives and are concerned about cost, performance, food safety compliance, or supply stability, DSM can provide professional material recommendations and reliable stainless steel solutions.

Contact our technical team today and let us help you find the right stainless steel for your next knife project.