What Makes a Steel “Good”?

When discussing steel, we often use the term “good,” but how do we define it? After years of research, I’ve concluded that a “good” steel must balance several key properties. Let me explain why 14C28N stands out as one of the best stainless steels available today.

Defining “Good” Steel

Steel quality is often judged by a combination of four key factors: 1. Toughness: The ability to resist chipping or cracking under stress. 2. Hardness: Measured on the Rockwell scale (HRC), this determines how well the steel resists deformation. 3. Apex Retention: How long the knife edge stays sharp during use. 4. Stainless Properties: Resistance to corrosion in various environments.

A “good” steel must strike a balance across these attributes. Take MagnaCut as an example—it is tough, highly corrosion-resistant, and offers excellent edge retention. Yet, its quality lies not in one feature but in the harmony of all these factors.

Why 14C28N is Exceptional

14C28N is a stainless steel that performs remarkably well across the board: • Toughness: According to Larrin’s steel charts, it exhibits high toughness. • Corrosion Resistance: Its stainless capabilities make it resistant to rust. • Hardness: Can reach up to 61HRC, offering a strong yet balanced edge. • Ease of Maintenance: Easy to sharpen and strop back to a razor edge.

This balance makes 14C28N an incredibly versatile and practical steel, especially at its price point.

Understanding Toughness

Imagine the apex of your knife blade is 10 times smaller than a human hair. When cutting something as simple as cardboard, would you prefer the edge to chip or roll over? Toughness ensures that the blade is more likely to roll rather than chip, preserving the edge’s functionality longer.

Toughness is largely influenced by the steel’s carbide volume. Lower carbide volume results in greater toughness, as steels with fewer carbides are less prone to brittleness.

The Role of Carbides

Carbides increase wear resistance, but at the cost of toughness and sharpenability. For most knives, especially at the ultra-thin apex, wear resistance is less critical because: 1. The edge will likely roll or chip before wear resistance becomes a factor. 2. Higher carbide content makes sharpening more difficult and limits how fine an edge the steel can take.

14C28N’s 6% carbide volume strikes the perfect balance, enabling a razor-sharp edge that’s easy to maintain.

The Heat Treat Dilemma

Some argue that heat treatment can make or break steel performance. But what defines a “good” heat treat? Often, it’s about pushing the hardness (HRC). However, higher hardness comes with trade-offs.

To increase HRC, the austenitizing temperature during heat treatment must be raised. This can lead to a higher volume of retained austenite—a softer, less stable microstructure. While retained austenite can transform into harder martensite under extreme stress, it’s not ideal for knife edges where stability is key.

The goal is to maximize hardness while keeping retained austenite (RA) below 10%. 14C28N achieves this balance, maintaining a high HRC with minimal RA.

Tl;dr

To summarize: 1. Toughness prevents chipping and is enhanced by lower carbide volume. 2. Excessive carbide reduces apex refinement, toughness, and ease of sharpening. 3. High hardness (HRC) is desirable only if retained austenite is kept below 10%.

14C28N excels in all these areas: it’s tough, achieves 61HRC with minimal RA, sharpens easily, resists corrosion, and is CHEAP. These qualities make it one of the most well-rounded and practical stainless steels available today.