Blade Steel

440A - Blade Steel

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Steel Composition

carbon 0.65 %
chromium 1.00 %
molybdenum 0.75 %
manganese 1.00 %
silicon 1.00 %

The 440A is a relatively low-cost, highly corrosion-resistant stainless steel. It is a member of the 440 stainless series which was designed in the US around the 1970s. While it may not be the most powerful knife steel out there, it is a reliable choice for knife makers, especially for those on a budget. Even though it has a rather low carbon presence, the presence of other elements like Molybdenum gives it a slight edge in terms of strength and hardness.

What are the Advantages of 440A?

The primary benefit of the 440A blade steel lies in its strength and resistance to corrosion. Due to its high chromium content, it is exceptionally resistant to corrosion, making it an excellent choice for knives that might be exposed to extreme weather conditions or environments. Moreover, with its high resistance to wear, the 440A is suitable for EDC knives that will undergo frequent use.

This steel features a balanced composition that makes it highly usable for a variety of knife types. Plus, it is known to take an edge fairly well, adding to its overall utility.

Disadvantages of 440A for Knives

However, the 440A steel comes with a few downsides. For one, it does not boast the highest edge retention abilities. This means a knife made from 440A steel may need frequent re-sharpening especially under heavy use. Also, though it has a decent hardness, it does not compare to some higher tier knife steels that offer far greater hardness along with better edge sharpness and retention.

Steel Rating

Steels with good edge retention will stay sharp longer, reducing the need for frequent sharpening

Edge Retention

2/6 Points

Toughness is the steel's ability to absorb energy and deform without breaking


2/6 Points

Corrosion Resistance measures how well the steel can resist rust and oxidation

Corrosion Resistance

4/6 Points

Sharpenability refers to how easily a knife blade can be sharpened to its desired edge


3/6 Points

This is a relative measure based on typical market values. The actual price can vary widel


5/6 Points

A higher HRC number typically indicates a harder steel, which can hold a sharper edge


55 - 57 HRC
Please be aware that this rating should be understood as a comparative measure. It's simply a rough estimation in relation to other knife steels.

Is 440A Rust Resistant?

What the 440A blade steel lacks in hardness and sharpness, it makes up for in its rust resistance capabilities. Thanks to high chromium content, it offers exceptional rust resistance, making it an excellent choice for damp or humid environments where rust could typically be an issue.

How Hard is 440A?

In terms of hardness, 440A lends itself well within the HRC range of 55-57. The balanced composition of the steel offers a good level of strength and hardness that can handle daily cutting chores. However, it must be noted that its hardness is clearly not at par with the likes of more premium-grade steels.

For What is 440A Recognized for?

The reputation of 440A predominantly revolves around its application in creating budget-friendly knives. Widely popular among knife enthusiasts, it is appreciated for its utility for creating decent quality, inexpensive knives. Due to its ease of sharpening coupled with its significant rust resistance, it's widely used for producing EDC knives. The 440A steel even finds applications in other tools and devices such as surgical instruments.

Similar blade steels


Overall, while the 440A blade steel may not be the top choice for the knife enthusiast seeking exceptional cutting power and edge retention, it does fulfill its purpose quite decently. Above all, its exceptional corrosion resistance makes it an outstanding choice for use in harsh conditions. Moreover, given its economical cost, it is a perfect option for those seeking a mix of affordability with decent performance.