Superplast® Premium

Superplast® Premium: large blocks of Superplast® mould steels with enhanced properties

Material properties
Prehardened steel for very large-size moulds and tools with high hardness and structure homogeneity through the block and improved texturing properties. Reliable repair welding and high thermal conductivity.

For which tool
Plastic injection mould cores and cavities, large-size moulds for bumpers, dashboards, television panels, etc.

For which plastic
Thermoplastics (PE, PP, PS), thermosetting plastics, transparent melts, ABS

Chemical analysis

Typical values (weight%).

Hardness C Si Mn S Ni Cr Mo B
300 0.26 0.10 1.40 0.002 0.30 1.40 0.45 +
350 0.26 0.10 1.50 0.002 0.30 1.60 0.65 +

Mechanical properties

Superplast® 2738 mod. Premium is delivered quenched and tempered to 290 – 330 HB (30 – 35 HRC) or 330-370 HB (35-39 HRC).

Hardness Rp 0.2 Yield strength Rm Tensile strength Elongation Reduction of area KCV 20°C Elastic modulus
HB MPa ksi MPa ksi % Z% J GPa
300 895 130 1000 145 16 60 35 205
345 940 136 1095 159 15 50 25 205

Typical values – thickness 400 mm – quenched and tempered


Thanks to a specific solidification process, Superplast® Premium steels exhibit a high homogeneity in both hardness and metallurgical structure (bainite + martensite) through the whole block, up to 1300 mm thickness. This aims at improved and reproducible performances in polishing, texturing and global surface aspect.

Reliable texturing abilities

Thanks to the absence of segregation, texturing is not limited to easy patterns anymore. SP Premium is suitable for geometrical and other complicated patterns (logos for instance).


Polishing is guaranteed up to SPI A2 (3-6μm, mirror polishing).
Apparition of orange peel or waves is limited thanks to the absence of segregation.

Dimensional program

Typical delivery sizes

Thickness Width
200-610 mm 1000-2100 mm


For more technical details :


Superplast® Premium

Download the complete datasheet

Technical data and information are to the best of our knowledge at the time of publication. However, they may be subjected to some slight variations due to our ongoing research programmes. Therefore, we suggest that information be verified at time of enquiry or order. Furthermore, in service, real conditions are specific for each application. The data presented here are for the purpose of description only, and can be considered as guarantees only when written formal approval has been provided by our company. Industeel reserves the right to change its product range at any time without prior notice.