S136 Stainless

Tooling Cavity Integrity

Injection moulding operations suffer from pitting corrosion when acidic condensates form inside closed cavities during polyethylene terephthalate cycles. Premium mould blocks prevent surface degradation that otherwise compromises optical clarity in moulded transparent components. Polishing operations achieve mirror finishes down to SPI A2 standards because carbide segregation remains minimal throughout the matrix.

Thermal conductivity stays stable across repeated heating and cooling sequences during high speed automation.

Material Specification

Chemical composition limits include carbon percentages near thirty eight hundredths alongside substantial chromium additions reaching fourteen percent. Vacuum degassing during steel production eliminates inclusions that cause micro cracking under high clamping forces. Suppliers deliver plates in the soft annealed condition or pre hardened up to forty HRC depending on machining requirements.

Heat treatment protocols require precise temperature control during austenitizing to ensure maximum corrosion resistance without sacrificing toughness.

Regrind Economics

Closed loop recycling streams introduce abrasive fillers and residual catalysts that accelerate mechanical wear on unprotected tool surfaces. Virgin polymer processing creates fewer abrasive contacts compared to filled regrind stocks containing glass or mineral additives. Tooling longevity declines rapidly when abrasive particulates scour the polished perimeter during high pressure packing phases.

Hardened stainless grades mitigate abrasive wear but demand higher initial machining investments than standard carbon steels.