DIMO 30H Steel

DIMO 30H Steel

Steel name: DIMO 30H
Diagram No.: 2323
AISI/SAE designation: ~4130
Chemical composition in weight %: 0.28-0.35% C, 0.15-0.40% Si, 0.95-1.30% Mn, <0.030% P, 0.010-0.040% S, 0.60-0.90% Cr, 0.15-0.25% Mo, >0.02% V
Steel group: Plastic mould steels
Properties: DIMO 30H (Holderblock) is a prehardened CrMnMo S-alloyed tool steel.
Applications: DIMO 30H (Holderblock) is a prehardened CrMnMo S-alloyed tool steel for the construction of plastic molds. DIMO 30H is applied by the customers for accessories with such holderblock requirements as ejector plates, supports, clamping plates and housings for diecasting dies.It is characterized by excellent dimensional stability as well as good machinability. It is also suitable for molds with low surface requirements referring to polishability.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: 840 - 860 °C (1540 - 1580 °F)/oil; for low wall thicknesses warm bath hardening at 200 - 230 °C (390 - 450 °F) is possible.
Tempering: In accordance with tempering diagram to required hardness (min. 1 h/25 mm (1 in) wall thickness).
Diagram note: The values in the diagram are mean values on samples, diameter 20 mm (¾ in), hardened at 850 °C (1560 °F) in oil.

Tempering Diagram

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Other Steel Data links
Carbides in Steel
CCT and TTT Diagrams of Steels
CCT and TTT Diagram Calculating Service
Hardenability Diagrams of Steels
Hardenability Calculating Service
Macro Defects in Steel
Metal Etchants
Non-Metallic Inclusions in Steel
Semiconductor Etchants

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