TASARIMDAN İMALATA
Plastic Mould Steels
Technical data and selection criteria for steels used in plastic injection moulds.
Choosing a mould steel
Selection depends on the plastic’s hardness and corrosiveness, the required surface finish and the process. Consider corrosion resistance, wear resistance, polishability, machinability, dimensional stability, electrical discharge machining, thermal conductivity, nitriding and surface hardening, texturing, and weldability.
1.1730
Properties and applications
For mould bases, moulds without demanding polishing requirements, and tools, equipment and machine parts that do not require hardening.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.42–0.50 |
| Si | 0.15–0.40 |
| Mn | 0.60–0.80 |
| P | ≤0.030 |
| S | ≤0.030 |
| Cr | — |
| Mo | — |
| V | — |
| W | — |
| Ni | — |
Tensile strength (N/mm²)
| Hardened condition | 400 °C | 450 °C | 500 °C | 550 °C |
|---|---|---|---|---|
| 1080–1270 | 1270 | 1180 | 1080 | 880 |
1.2083
Properties and applications
Corrosion-resistant stainless plastic mould steel with excellent mirror-polishing properties. For corrosive plastics, especially PET preform and in-mould labelling moulds, and thin ribs requiring toughness and a good surface finish.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.36–0.42 |
| Si | 1.00 |
| Mn | 1.00 |
| P | 0.030 |
| S | 0.030 |
| Cr | 12.50–14.50 |
| Mo | — |
| V | — |
| W | — |
| Ni | — |
Physical properties
| Temperature | Elastic modulus (kN/mm²) | Thermal expansion coefficient (10⁻⁶ K⁻¹) | Thermal conductivity (W/(m·K)) |
|---|---|---|---|
| 20 °C | 210 | — | 16.5 |
| 400 °C | 198 | 11.5 | 19.8 |
| 600 °C | 167 | 12.1 | 24.1 |
1.2311
Designations in the archived data sheet: AISI / ASTM P20 · DIN 1.2311 · EN 40CrMnMo7
Properties and applications
Suitable for excellent polishing, texturing, nitriding and chromium plating. Used for plastic moulds and mould bases.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.35–0.45 |
| Si | 0.20–0.40 |
| Mn | 1.30–1.60 |
| P | 0.035 |
| S | 0.035 |
| Cr | 1.80–2.10 |
| Mo | 0.15–0.25 |
| V | — |
| W | — |
| Ni | — |
Physical properties
| Temperature | Elastic modulus (kN/mm²) | Thermal expansion coefficient (10⁻⁶ K⁻¹) | Thermal conductivity (W/(m·K)) |
|---|---|---|---|
| 20 °C | 210 | — | 34.0 |
| 400 °C | 196 | 12.6 | 33.4 |
| 600 °C | 177 | 14.4 | 33.0 |
1.2312
Designations in the archived data sheet: AISI / ASTM P20+S · DIN 1.2312 · EN 40CrMnMoS8-6
Properties and applications
Sulphur improves machinability. Used for injection moulds that do not require a highly polished surface.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.35–0.45 |
| Si | 0.30–0.50 |
| Mn | 1.40–1.60 |
| P | 0.030 |
| S | 0.05–0.10 |
| Cr | 1.80–2.00 |
| Mo | 0.15–0.25 |
| V | — |
| W | — |
| Ni | — |
Physical properties
| Temperature | Elastic modulus (kN/mm²) | Thermal expansion coefficient (10⁻⁶ K⁻¹) | Thermal conductivity (W/(m·K)) |
|---|---|---|---|
| 20 °C | 210 | — | 34.0 |
| 400 °C | 196 | 12.6 | 33.4 |
| 600 °C | 177 | 14.4 | 33.0 |
1.2316
Properties and applications
High chromium and molybdenum contents provide corrosion resistance, with good wear and surface properties. Used for corrosive plastics such as PVC.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.33–0.45 |
| Si | 1.00 |
| Mn | 1.50 |
| P | 0.030 |
| S | 0.030 |
| Cr | 15.50–17.50 |
| Mo | 0.80–1.30 |
| V | — |
| W | — |
| Ni | 1 |
Physical properties
| Temperature | Elastic modulus (kN/mm²) | Thermal expansion coefficient (10⁻⁶ K⁻¹) | Thermal conductivity (W/(m·K)) |
|---|---|---|---|
| 20 °C | 210 | — | 17.5 |
| 400 °C | 198 | 11.4 | 20.7 |
| 600 °C | 177 | 12.2 | 23.2 |
1.2738
Properties and applications
Generally used for plastic injection moulds with sections thicker than 400 mm in the archived application examples.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.35–0.45 |
| Si | 0.20–0.40 |
| Mn | 1.30–1.60 |
| P | 0.030 |
| S | 0.030 |
| Cr | 1.80–2.10 |
| Mo | 0.15–0.25 |
| V | — |
| W | — |
| Ni | 0.90–1.20 |
Physical properties
| Temperature | Elastic modulus (kN/mm²) | Thermal expansion coefficient (10⁻⁶ K⁻¹) | Thermal conductivity (W/(m·K)) |
|---|---|---|---|
| 20 °C | 210 | — | 32.0 |
| 400 °C | 196 | 12.7 | 31.1 |
| 600 °C | 177 | 14.3 | 30.0 |
These values reproduce our technical archive. Confirm the exact grade, delivery condition and required properties against the material supplier’s certificate. A dash means that the source does not specify a value.