What steel and heat-treatment evidence should a buyer request before approving an export injection mold?
Ask for a mold-material map that links each cavity, core, insert, slider and lifter to the quoted steel grade, certificate trail, heat-treatment requirement, hardness report, surface-treatment note and spare-part identity. Steel origin, exact grade, hardness, mold life, corrosion performance, price and delivery remain NEEDS_EVIDENCE until the exact project records are reviewed.
Decision checklist
- Match cavity, core, slider, lifter and insert evidence to the drawing or bill of materials.
- Request supplier or mill certificates that can be tied to the actual mold components.
- Require heat-treatment and hardness records where the mold design depends on them.
- Keep mold life, corrosion resistance, price and delivery evidence-gated until project files exist.
Do not approve steel from a quotation line alone
A mold quotation may name a familiar steel grade, but the buyer still needs evidence that the actual cavity, core, slider, lifter and insert package matches the promise. The useful review starts with a component map rather than one material name.
For export projects, that evidence should be kept with the trial report and shipment handover file, so steel promises are not separated from the mold that is actually leaving the supplier.
A steel grade in a quote is a promise. A component map, certificate trail and acceptance record are the evidence.
Build the steel evidence file
Mold-steel supplier documentation explains why wear resistance, corrosion resistance, polishability, toughness and dimensional stability matter. Use that context to review the buyer's part, resin and maintenance expectations before approving the mold.
The evidence file should identify quoted steel grades, certificate sources, heat-treatment status, hardness measurement points, surface treatment and spare insert identity. Missing records should stay visible as NEEDS_EVIDENCE, not be hidden inside a general approval note.
- Material map: cavity, core, base, sliders, lifters, inserts and spare inserts.
- Certificate trail: supplier certificate, mill certificate, purchase record or equivalent traceability.
- Heat-treatment route: hardening, tempering, stress relief, nitriding or pre-hardened condition.
- Hardness report: measurement method, point map and accepted value range.
- Risk context: abrasive filler, flame retardant, corrosion, polish requirement and cooling-water risk.
Technical limitations
Public steel and molding references support the buyer checklist, but they do not prove the steel grade, heat-treatment quality, mold life, price or delivery of any GEERPOWER project. The actual evidence must come from the selected mold, supplier records and buyer approval file.
Hardness is also not the only signal. Machining, polishing, cooling, venting, maintenance access, trial results and handover completeness still affect the final mold decision.
Common buyer questions
Is a steel grade in the quotation enough evidence?
No. The quotation is a promise. The buyer still needs a component map, certificate trail and acceptance record that match the actual mold.
Does a hardness report prove mold life?
No. Hardness is one useful check, but mold life also depends on steel quality, design, machining, heat treatment, resin, maintenance, cooling, surface finish and operating conditions.
Should spare inserts have their own evidence?
Yes. Spare inserts should be named in the handover file and matched to steel grade, heat-treatment status and drawing identity where those details affect performance.
Sources and references used for this guide
This guide supports early project planning. Final machine selection and commercial configuration must be confirmed from the actual part, mold, material, factory utilities and production target.
