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Help CenterS-STAR Plastic Mold Steel | Ultra Mirror Stainless Tool Steel
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Small order accepted, custom cutting supported
Product Overview
S-STAR is a premium pre-hardened stainless plastic mold steel, designed for applications requiring high mirror finish, corrosion resistance, and dimensional stability.
It is widely used in transparent plastic molds, medical molds, and cosmetic packaging molds, especially where surface quality is critical.
Key Features (Selling Points)
Ultra Mirror Finish Performance
Special refining process ensures excellent polishability, ideal for optical and transparent products.Excellent Corrosion Resistance
Suitable for PVC, flame-retardant resins, and humid working environments.High Hardness Capability
Can reach up to HRC 50–53 after heat treatment, ensuring long mold life.Pre-Hardened for Easy Machining
Delivered at around HRC 30–34, reducing machining time and cost.Minimal Distortion After Heat Treatment
Dimensional change is extremely small, improving precision and stability.Uniform Microstructure (ESR Technology)
Cleaner steel with fewer inclusions → better surface quality and longer service life.
Typical Applications
Transparent plastic molds (PMMA / PC lenses)
Medical device molds
Cosmetic container molds
Food-grade packaging molds
High-gloss injection molds
Available Supply Condition
Pre-hardened: HRC 30–34
Annealed (for further heat treatment)
Shapes: round bar, flat bar, blocks
Why Choose S-STAR?
If your mold requires mirror polishing + corrosion resistance + dimensional stability, S-STAR is one of the best alternatives to materials like S136 / 420 ESR, with more stable internal quality and finishing performance.
SEO Keywords
S-STAR steel / plastic mold steel / mirror finish mold steel / stainless mold steel / S-STAR round bar / S-STAR flat bar / corrosion resistant mold steel / S136 equivalent steel
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