a2 and m390 which is better for making knife?

A2a2 steel is: carbon (c) 1.00-1.50 percent , chromium (cr) 4.75-5.50 percent , molybdenum (mo) 0.90-1.40 percent , and cobalt (co) 0.25 percent .

1. High hardness: After quenching treatment, the hardness of a2 steel can reach 60-62 HRC, making it very suitable for making cutting edges.
2. Good cutting performance: The structure of a2 steel is very delicate and contains rich elements such as chromium and molybdenum, which can achieve good cutting performance.
3. Suitable for making durable cutting tools: Due to the excellent hardness and toughness of a2 steel, it is suitable for making tools that require durability.

1. Water cooling cannot be used: Due to the small amount of cobalt in the synthesis of a2 steel, water cannot be used for cooling.
2. Easy to rust: A2 steel has poor corrosion resistance and is prone to rust.
About blade material m390
Knife material M390 is a high-grade stainless steel, also known as superalloy, and is currently one of the most popular high-grade knife materials on the market. The chemical composition of M390 steel is: carbon (C) 1.90 percent , molybdenum (Mo) 4.00 percent , cobalt (Co) 1.00 percent , chromium (Cr) 20.00 percent , vanadium (V) 0.60 percent , and silicon (Si) 0.70 percent .

1. High hardness: The hardness of m390 steel can reach 60-62 HRC, making it very suitable for making cutting edges.
2. Excellent corrosion resistance: The main components of m390 steel are chromium, molybdenum, and vanadium, which can achieve excellent corrosion resistance.
3. Good cutting performance: Compared with a2 steel, m390 steel has better cutting performance and can achieve higher cost-effectiveness.

1. Expensive price: Due to the complex synthetic composition of m390 steel, the cost is also very expensive.
2. Relatively difficult to machine: The hardness of m390 steel also brings a certain degree of difficulty in machining, requiring complex processes such as high-temperature treatment and quenching.