Aluminum mold insert and hardened steel mold insert side by side on a workbench Figcaption： Soft tooling in aluminum (left) and hard tooling in hardened tool steel (right): same cavity concept, different service life.
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Soft Tooling vs. Hard Tooling: When Aluminum Beats Steel (and When It Doesn’t)

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A practical comparison of soft (aluminum) and hard (steel) injection mold tooling, covering shot-count economics, design transfer risk, and when bridge tooling can replace a second steel mold entirely.