Patt steels · Plastics tooling
Steels for plastics and extrusion tooling
Five Patt grades for different balances of core strength, wear, corrosion and surface finish. Choose the material around your resin, operating temperature and tooling requirements.
Five grades. Seven design tradeoffs.
Engineering selection scores: 0–100 in steps of 5. Mechanical ranges include program results and engineering estimates.
Balanced extrusion tooling
PEA
PEA balances core strength, corrosion resistance and a fine working finish for extrusion tooling. Its precipitation-hardened stainless core supports dies, breaker plates, filter bodies and precision melt-contact components. Plasma nitriding adds a hard working surface for sliding and polymer-contact wear.
| Mechanical property | Design values |
|---|---|
| Core hardness | 48–49.5 HRC |
| Tensile strength | 1,700–1,900 MPa |
| Charpy V-notch impact | 44 J |
Core strength and load support
Structural
Structural prioritizes core strength and load support in highly stressed tooling. Its high aged hardness supports resistance to indentation and permanent deformation, including beneath a nitrided case. Typical applications include loaded breaker plates, support components, inserts and wear parts.
| Mechanical property | Design values |
|---|---|
| Core hardness | 51.5–53.3 HRC |
| Tensile strength | 1,780–1,950 MPa |
| Charpy V-notch impact | 35–80 J |
Corrosion and toughness
PEA+
PEA+ combines a refined precipitation-hardening system with a fine, polishable matrix. It targets a balanced combination of strength, toughness and corrosion resistance for precision dies, polished flow channels and demanding melt-contact tooling.
| Mechanical property | Design values |
|---|---|
| Core hardness | 47.5–50.5 HRC |
| Tensile strength | 1,660–1,850 MPa |
| Charpy V-notch impact | 45–90 J |
Wear and elevated-temperature tooling
Patt Tool
Patt Tool is designed for elevated-temperature plastics tooling and abrasive service. A carbide-bearing core combines high working hardness with temper resistance, supporting wear inserts, filled-compound tooling and high-temperature extrusion components. Its material-selection profile places temper resistance above H13 with comparable abrasive wear resistance.
| Mechanical property | Design values |
|---|---|
| Core hardness | 50–57 HRC |
| Tensile strength | 1,750–2,070 MPa |
| Charpy V-notch impact | 6–25 J |
Corrosion-focused tooling
Patt Corrosion
Patt Corrosion prioritizes corrosion resistance for melt passages, dies and precision tooling exposed to aggressive processing residues and cleaning environments. Its lower working-hardness range supports a toughness-focused balance for components where corrosion is the principal material-selection driver.
| Mechanical property | Design values |
|---|---|
| Core hardness | 42–48 HRC |
| Tensile strength | 1,420–1,680 MPa |
| Charpy V-notch impact | 80–170 J |
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