How To Choose between Mold Steel S136 And NAK80? Fanstar Matches Product Requirements Based on Material Engineering Thinking.

"How to choose between mold steel S136 and NAK80?" - This is a common technical question from high-end customers when launching projects for high-gloss, long-life or corrosive materials. As a manufacturer specializing in export-grade precision molds, Fanstar not only offers steel options but also provides scientific selection suggestions based on product functions, material characteristics and mass production goals, ensuring the optimal balance between mold performance and cost.

S136 (4Cr13) is a high-purity stainless steel with excellent corrosion resistance and mirror finish (up to SPI-A1 level), suitable for transparent parts, high-gloss appearance parts, and scenarios where corrosive gases are prone to be released from PVC and flame-retardant materials; while NAK80 is a pre-hardened mirror steel (with hardness ranging from 37 to 43 HRC), which can be directly processed without heat treatment and has excellent dimensional stability, making it suitable for large-scale production where delivery time is critical and quick delivery is required for structural components.

In practical applications:

The pen molds mostly use S136 to ensure that the high-gloss transparent pen shafts are free of rust spots and white spots at the top;

If the electromechanical shell molds contain glass fiber reinforcing materials and the production volume exceeds 500,000 mold cycles, S136 + TD coating should be preferred to enhance wear resistance;

For non-corrosive and high-efficiency requirements of aviation auxiliary component molds, NAK80 can shorten the heat treatment cycle by 2 weeks, accelerating the project implementation.

As a professional mold factory, Fanstar sources all its steel materials from ASSAB or Hitachi Metal directly, and provides material certificates. We not only answer questions like "How to choose between mold steel S136 and NAK80", but also through the material-process collaborative design in the DFM stage, ensure that each mold is "selected correctly from the very beginning".

Please feel free to contact Fanstar to obtain the "S136 vs NAK80 Selection Guide" and your personalized material matching plan.