Superplast® Stainless

A patented free machining holder steel that meets or exceeds standards for grade W 1.2085 (AISI 420 FM).

Material properties
Corrosion resistant mould steel with excellent machinability, high dimensional stability, consistent hardness and improved thermal conductivity.

For which tools
Mould holders, support plates, hot runners, mould components.

For which plastics
Chemically aggressive and acid – releasing plastics. Injection moulding,rubber injection moulding, nextrusion, etc.

Chemical analysis

Typical values (weight%).

C Si Mn S Ni Cr N
0.07 0.15 1.40 0.12 0.50 12.0 +

Mechanical properties

Superplast® Stainless is delivered hardened and tempered to 290 – 330 HB.

Test thickness Test hardness Yield strength (ksi) Tensile strength (ksi)
100 mm (3.93″) 310 HB 890 N/mm² (129) 1000 N/mm² (145)

Delivery conditions

Typical delivery sizes

Manufacturing process Thickness Width
Hot rolling 15 – 150 mm – 0.59 – 5.90″ 2000 mm – 78.74″
Hot forging 150 – 350 mm – 5.90 – 13.77″ 2000 mm – 78.74″

For more technical details :


Superplast® Stainless

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.