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NetProto

Steel injection mold

Steel Injection Mold: Grades, Hardness and Cycle Life

Steel injection mold searches mix material grade, hardness, and expected output. NetProto standardizes on one hardened steel product selected in DFM.

One product

Hardened steel without a public grade catalog

Listing mold steel grades on a marketing site invites apples to oranges comparisons without your resin, volume, or geometry.

NetProto selects hardened steel during DFM for the part and program. There is one tooling product, not good better best steel tiers.

Expectations

Marketing grades versus program steel

NetProto hardened steel tool

  • Steel chosen with you during DFM.
  • Typical output is 100,000+ parts on many programs.
  • Same tool runs reorders.

Grade shopping on a website

  • Grades listed without your resin context.
  • Implied equivalence between suppliers.
  • Hidden second tools when wear exceeds grade assumptions.

What to send instead of picking a grade online

  • Resin family including filled variants.

  • Annual volume and reorder expectations.

  • Cosmetic and texture requirements.

  • Critical dimensions and tolerance bands.

Life framing

Typical output versus contractual life promises

StatementAllowed framingAvoid
100,000+ partsTypical for hardened steelWarranty or life promise
Tool wearDepends on resin and maintenanceFixed cycle count promise

Ownership

You own the steel tool

Once the tooling charge is paid the mold is yours, including export when needed.

  • Request mold export when you need the tool physically
Hardened steel mold cavity during inspection

Related

FAQ

Steel mold questions

Which steel grade do you use?

Hardened steel selected during DFM; grades are not published.

Can you promise a fixed mold life?

No. Typical output is 100,000+ parts depending on resin, part geometry, and maintenance.

Next step

Start with DFM on your CAD

Upload for steel scope on your program. NetProto manufacturing is ISO 9001 certified.