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Plastic Moulding

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For best tooling and production economy, optimum mould materials must be chosen. In our product program, you will always find materials suitable for your requirements. Common demands on tool materials for plastic moulding tools are:
 
  • High surface finish after polishing
  • Corrosion resistance
  • Wear resistance
  • High thermal conductivity
  • Good machinability
  • Good surface finish after EDM or photo etching


Grade ASSAB
Grade Uddeholm
Chemical Composition (%)
C Mn Cr Mo V W Others
Hardness supplied approx. HB
Ref. Standard
AISI W.nr JIS
Characteristics Applications
618, 618HH
-
0.38
1.4 2.0 0.2 - - Ni 1.0 618: 290-330 618HH: 340-380 P-20 Mod. 1.2738 - Prehardened plastic mould steel. Good polishability and good machinability. Injection moulds for thermo-plastics, extrusion dies for thermo-plastics, blow moulds, forming tools, machine components.
618 T
-
0.26
1.45 1.25 0.6 0.12 - Ni 1.05 310-355 - - - Pre hardened mould steel with exceptional through hardening properties, good polishability and etching properties combined with good machinability. Suitable for large and very large moulds with high demands on surface finish.
718 SUPREME
UDDEHOLM IMPAX SUPREME
0.37
1.4 2.0 0.2 - - Si 0.3, Ni 0.2, S < 0.01 ~310 prehard P20 Mod. 1.2738 - Prehardened mould steel with very good polishing and photo etching properties. Suitable for a wide range of injection moulds, blow moulds and extrusion dies for plastic.
718 HH
-
0.37
1.4 2.0 0.2 - - Ni 1.0 S < 0.01 340-380 P-20 Mod. 1.2738 - Modified prehardened plastic mould steel. Very good polishability and improved wear resistance. Injection moulds and extrusion dies for thermo-plastics, blow moulds. Forming tools, press-brake dies, structural components, shafts.
NIMAX
UDDEHOLM NIMAX
0.1
2.5 3.0 0.3 - - Ni 1.0, Si 0.3 360-400 - - - Prehardened mould steel with best toughness, machinability and good polishability. General grade for injection moulds of all sizes, extrusion dies, forming tools, press break dies, holders for die casting dies.
CALMAX alt. 635
UDDEHOLM CALMAX
0.6
0.8 4.5 0.5 0.2 - Si 0.35 200 - 1.2358 - A general steel for plastic moulds and for heavy duty blanking. High toughness, good wear resistance and good polishability. Moulds for the production of electrical components. Typical for blanking dies with high demands on toughness.
UNIMAX
UDDEHOLM UNIMAX
0.5
0.5 5.0 2.3 0.5 - Si 0.2 185 - - - High hardness, very good toughness. ESR for good polishability. Suitable for coating and nitriding. Plastic moulds for abrasive plastics. Suitable for heavy blanking, powder compacting as well as for warm forging.
RAMAX HH
UDDEHOLM RAMAX HH
Cr-
Ni- Mo- V alloyed + Sulphur - ~340 - - - Stainless steel for holder blocks with excellent machinability and corrosion resistance. Holders/bolsters for plastic moulds, plastic and rubber moulds with low requirements on polishability, dies for plastic extrusion and for constructional parts.
ROYALLOY
-
0.05
1.2 12.6 - - - S 0.12 290-330 Patented - - Stainless steel for holder blocks with excellent machinability and corrosion resistance. Holders/bolsters for plastic moulds, plastic and rubber moulds with low requirements on polishability, dies for plastic extrusion and for constructional parts.
STAVAX ESR alt. S136 ESR
UDDEHOLM STAVAX ESR
0.38
0.5 13.6 - 0.3 - Si 0.9 215 420 mod. (1.2083) SUS 420 Stainless plastic mould steel with excellent polishability and corrosion resistance. Injection moulds for highly polished parts and for moulding corrosive plastics.
MIRRAX ESR
UDDEHOLM MIRRAX ESR
0.24
0.5 13.3 0.35 0.35 - Ni 1.4 N 0.12 250 420 Mod. - SUS420 Mod. Stainless mould steel with a unique combination of toughness, corrosion resistance and through-hardening properties. For all type of moulds, especially suited for larger tools where corrosion in production is unacceptable and where high surface finish is required.
POLMAX
UDDEHOLM POLMAX
0.38
0.5 13.6 - 0.3 - Si 0.9 215 420 mod. (1.2083) SUS 420 Excellent polishability. Good resistance to corrosion and wear. Good machinability. Recommended where extreme surface finishes are required, such as lens moulds and CD moulds.
CORRAX
UDDEHOLM CORRAX
0.03
0.3 12.0 1.4 - - Ni 9.2 Al 1.6 ~330 - - - Age hardening stainless steel with superior corrosion resistance. Age hardening stainless steel with superior corrosion resistance.
ELMAX SUPERCLEAN
UDDEHOLM ELMAX SUPERCLEAN
1.7
0.3 18.0 1.0 3.0 - Si 0.8 240 - - - Powder tool steel. Stainless plastic mould steel with high wear resistance. Electronics industry: connectors, plugs, switches, resistors, integrated circuits. Machine parts for food processing industry.
MM 40
-
-
- - - - - - 40 HRC - - - High-strength beryllium copper mould alloy supplied at ca 40 HRC, suitable where a combination of high thermal conductivity, corrosion resistance and polishablity is needed. Blow moulds: pinch offs, neck rings and handle inserts. Injection moulds: moulds, cores and inserts.
MM XL
-
-
- - - - - - 28 - 32 HRC - - - Copper alloy with high thermal conductivity, good toughness and excellent machinability. Primarily for core inserts in medium and large injection moulds.
PT 18
-
-
- - - - - Be 0.4 Ni 1.8 190 - - - Moderate strength beryllium copper mould alloy with extremely high thermal conductivity. Nozzle tips, gates and manifolds for hot runner systems.
PRODAX
ALUMEC/PRODAX
-
- - - - - - 165 - - - High strength Aluminium with good machinability and low weight. Blow moulding, vacuum forming, foam moulding, rubber moulds, footwear moulds, injection moulds, RIM-forming, jigs and fixtures, bolsters and holders.
 
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