ThePipingMart Blog Metals 7CR17 vs 3CR13 Steel – What’s the Difference

7CR17 vs 3CR13 Steel – What’s the Difference

7CR17 vs 3CR13 Steel

If you’re in the market for a new knife, you’ve come across two popular types of stainless steel: 7CR17 and 3CR13. Though these two types of steel seem similar, they have some important differences that can impact the performance and longevity of your knife. In this blog post, we’ll explore the differences between 7CR17 and 3CR13 and help you decide when choosing your next knife.

What is 7CR17 Steel?

7CR17 Steel is a Chinese high-carbon martensitic stainless steel. It incorporates 0.7% carbon for strength and hardness, 17% chromium for corrosion resistance and other properties, such as toughness, creep strength and wear resistance. Compared to its parent grade 420 stainless steel, it offers increased hardness values and better edge retention while maintaining similar corrosion resistance levels.

What is 3CR13 Steel?

3CR13 steel is a type of martensitic stainless steel commonly used for making knives and other cutting tools. It has good corrosion resistance, sharpness retention, and strength. The alloy contains 0.3% carbon and 13% chromium, with other trace elements like molybdenum or vanadium, to improve its properties further. This makes it a great choice for applications where strength and durability are important factors – such as scissors or kitchen cutlery!

Difference Between 7CR17 and  3CR13 Steel 


7CR17 and 3CR13 are both stainless steels made of carbon, chromium, and nickel—however, the key difference lies in their composition. 7CR17 contains 0.75% carbon, 17% chromium, and 1% nickel, while 3CR13 contains 0.3% carbon, 13% chromium, and 1% nickel. This means that 7CR17 is slightly harder and stronger than 3CR13. However, this hardness makes it more brittle and prone to chipping and cracking.

Sharpness and Edge Retention:

Due to its higher carbon content, 7CR17 can be sharpened to a finer edge than 3CR13. Moreover, the finer edge will last longer on 7CR17 than on 3CR13, which has less carbon. However, this also means that 7CR17 requires more upkeep than 3CR13 as it is prone to chipping and cracking.

Corrosion Resistance:

Both types of steel are corrosion resistant, but 7CR17 is slightly more resistant to corrosion than 3CR13, thanks to its higher chromium content. 7CR17 also has a higher nickel content, which can help protect against rust and corrosion. If you live in a humid area and your knife is exposed to moisture, 7CR17 may be a better option.


Price can be a deciding factor when choosing between 7CR17 and 3CR13. Generally, 7CR17 is more expensive compared to 3CR13. This is because 7CR17 is considered higher quality steel due to its composition and cost.


Choosing the right knife can be daunting, especially when deciding between two similar materials, such as 7CR17 and 3CR13. Ultimately, it comes down to personal preference and the knife’s intended use. If you’re looking for a knife that can hold a sharp edge and are willing to perform extra maintenance, 7CR17 is the way to go. However, if you’re looking for a budget-friendly knife that requires minimal upkeep, 3CR13 is a solid choice. No matter what you choose, research and invest in a good-quality knife that will last you for years.

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