S-7 ESR Mold Steel Data Sheet

Common Tradenames: S-7 XL, S-7 Mold Quality

S-7 ESR is a high purity version of S-7 tool steel that is produced using the electrslag remelt process. This process produces a more uniform microstructure and better microcleanliness, providing the toolmaker with higher polishibility, higher transverse toughness and better consistency in wire EDM operations. S-7 ESR is especially useful in plastic molds requiring a high degree of polishibility.

Chemical Composition

Carbon 0.55%
Manganese 0.70%
Chromium 3.25%
Molybdenum 1.40%
Vanadium 0.25%

Typical Applications

Heavy Impact Punches
Vinyl Extrusion Dies
Plastic Injection Molds
Powder Compaction Punches

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