About the material used for insert nut
- Brass (C3604)?
- Brass (C6801)?
- Stainless steel (SUS303)?
Many of the materials produced in the world have different characteristics. Although some insert nuts are made of various materials, the performance of the finished insert nut will differ depending on the material used. Therefore, we will explain the materials used for insert nuts.
Brass (C3604) is a material obtained by adding lead to brass (C2801). The addition of lead improves the "machinability" (the ease of material cutting) of brass. Due to its characteristics, it is a material suitable for "high-speed automatic processing". It is also a material often used for precision instrument parts, gears and watch parts.
The name of brass (C3604) is also known as "2 types of free-cutting brass". In other words, it is called brass (C3602) because there is "one class of free-cutting brass". C3602 is more suitable for “cold forging” (a processing technology that applies pressure to metal to deform while forming at room temperature), but C3604 has a longer tool life. .?
Brass (C6801) is brass that does not use lead. As mentioned earlier, while the conventional brass has improved its machinability by adding lead, lead is also one of the environmental load substances. In other words, brass that contains lead has the risk of lead scattering into the air due to wear due to processing and use, and lead elution.
So, C6801 is made by adding "bismuth" instead of lead. It does not contain lead and achieves the same level of strength, machinability and corrosion resistance as conventional brass. Another feature is its excellent thermal conductivity and conductivity, so it is often used for electrical and electronic parts, and automotive parts.
Stainless steel (SUS303)
The second is "high resiliency." Plastic parts are highly resilient compared to metal parts, for example, by making the body skin plastic, it can be easily restored to its original shape if it is slightly bumped. This will reduce the cost needed to repair in the event of an accident.
Stainless steel (SUS303) is a material containing nickel. It is a non-magnetic metal with excellent corrosion resistance. SUS303 improves cuttability by adding sulfur etc. to "SUS304".
In addition, it is said that it is extremely difficult to distinguish SUS303 and SUS304 only by visual inspection. When cutting with a lathe, the difference is often clearly seen, and while SUS303 is powdery, SUS304 is often banded.