Views: 0 Author: Site Editor Publish Time: 2023-08-18 Origin: Site
Stainless steel is a versatile material that is used in a wide variety of applications, ranging from kitchen utensils to industrial machinery. One of the most commonly used stainless steel grades is 420, which is known for its excellent corrosion resistance, high strength, and durability. In this article, we will explore the differences between 420 & 420J2 and help you determine which one is best suited for your needs.
The main difference of 420J2 and 420 is standard,420 is American standard (ASTM A959) and 420J2 is Japanese Standard (JIS G 4305).
The United States standard only stipulates the minimum requirements for the carbon content of 420 stainless steel, while the Japanese standard divides the carbon content into 0.16-0.25 & 0.26-0.4 according to different grades, and is named SUS420J1 SUS420J2.Follow is the detail of chemical composition:
standard | Type | C | Si | Mn | P | S | Cr |
ASTM A959 | 420 | 0.15min | 1.0max | 1.0max | 0.04max | 0.03max | 12.0-14.0 |
JIS G 4305 | SUS420J1 | 0.16-0.25 | 1.0max | 1.0max | 0.04max | 0.03max | 12.0-14.0 |
SUS420J2 | 0.26-0.40 | 1.0max | 1.0max | 0.04max | 0.03max | 12.0-14.0 |
According to the above comparison, we can know that there is a fungifiable relationship between the two materials, SUS420J1 and SUS420J2 components are within the standard range of 420, so it can be simply said that 420J2 belongs to 420.
Due to their different composition, 420J1 and 420J2 stainless steel have varying levels of strength and hardness.420J1 has a lower carbon content, which makes it less hard and less durable than 420J2 stainless steel. However, it is more resistant to corrosion and can be easily sharpened.
420J2 stainless steel, on the other hand, has a higher carbon content, which makes it harder and more durable than 420J1.It can maintain its edge better and is more suitable for heavy-duty applications that require high strength and hardness.
The different properties of 420J1 and 420J2 stainless steel make them suitable for different applications. 420J1 is commonly used in manufacturing knife blades, as it is easy to sharpen and has good corrosion resistance.It is also used in the production of scissors, surgical instruments, and other small tools.
420J2 stainless steel, on the other hand, is used in a wider range of applications due to its higher strength and hardness. It is commonly used in the manufacturing of industrial machinery blade, pump parts, valve components, crystal ring, HDD parts and other heavy-duty equipment that require high strength and corrosion resistance.
Another important factor to consider when choosing between 420J1 and 420J2 stainless steel is their weldability and machinability. 420J1 is more weldable than 420J2 stainless steel due to its lower carbon content, which reduces the risk of cracking during the welding process. However, it is also less machinable than 420J2 stainless steel due to its lower hardness.
420J2 stainless steel, on the other hand, is less weldable than 420J1 due to its higher carbon content, which increases the risk of cracking during the welding process. However, it is more machinable than 420J1 due to its higher hardness.
The cost of 420J1 and 420J2 stainless steel can also vary depending on the supplier and the specific application. In general, 420J1 is less expensive than 420J2 stainless steel due to its lower carbon content and lower hardness. However, the cost difference may not be significant in some applications, and other factors, such as corrosion resistance and strength, maybe more important.
In conclusion, 420 include 420J1 and 420J2, 420 is US standard name and 420J2 is Japanese standard name.
420J1 and 420J2 stainless steel are two distinct sub-types of the 420 stainless steel family, each with its unique properties and applications. 420J1 is more resistant to corrosion and easier to sharpen, making it suitable for knife blades and small tools. 420J2 stainless steel, on the other hand, is harder and more durable, making it suitable for heavy-duty applications such as industrial machinery and valve components. When choosing between these two materials, it is important to consider factors such as strength, hardness, weldability, machinability, and cost, as well as the specific requirements of your application.
