Tooling Possession Safeguards and Asset Tagging in China Factories
Secure China factory tooling title with bilingual bailment contracts, tamper-proof steel plaques, and notarized audits to prevent commercial lien detention.
S136 Hardened Steel
Meaning
A high-purity, martensitic stainless tool steel alloy containing high chromium content offers superior corrosion resistance and high mirror polishability for plastic injection mold fabrication. In precision molding applications, S136 hardened steel forms core inserts and cavity blocks. Material utility applies to mold component fabrication and excludes structural mold frame bolster construction.
Material Metallurgy
Extensive electroslag remelting processing removes non-metallic inclusions, producing a homogenous grain structure optimized for high-gloss surface polishing and photo-etching. Alloy composition featuring thirteen percent chromium delivers excellent resistance to corrosive PVC plastics and humid storage conditions. Heat treatment through vacuum hardening and multi-stage tempering elevates S136 hardened steel to a operational working hardness between forty-eight and fifty-four on the Rockwell C scale.
This microstructural hardness enables mold components to withstand continuous abrasive wear from glass-filled resins while retaining high-polish optical finishes across millions of injection molding cycles without surface pitting or stress corrosion cracking.
Machining Protocol
Toolmaking shops execute rough machining and cooling line creation while the alloy remains in an annealed state prior to thermal hardening. Heat treating components induces minimal dimensional movement, but toolmakers perform final grinding and optical polishing after hardening to achieve micro-meter tolerances.
Tooling Longevity
Tooling procurement contracts specify certified steel origin and heat treatment certificates to prevent premature cavity failure in high-volume export tooling. In Chinese mold-making clusters, substituting lower-grade domestic chromium steels for genuine S136 hardened steel leads to rapid surface rusting and costly production downtime. Requiring hardness testing reports and spectral material analysis ensures that delivered tooling meets international quality specifications.