24 July 2021 Mould Steel Bar
40CrMnNiMo Mould Steel Bar
40CrMnNiMo is Mould steel for plastic mould use. With large dimensions > 400 mm thick. Properties as for grade 2311 ISO-BM, but with improved through-hardening. Nitridable, hard chrome plateable, flame hardenable, polishable, grain-reliable as delivered.In an extreme dimensional range, and where there is a requirement for l Higher hardness and better through-hardenability l Polishability > 320 grit l Sensitive etch-graining designs (e.g. HNO3)l Higher thermal conductivity we recommend grade 2738mod.TS(HH).
ApplicationsTools for compression and injection moulds, bumpers, dashboards, chairs, rubbish bins, bottle crates, television cabinets, etc.Delivered conditionQuenched and tempered to 280–325 HB ( approx. 950–1100 MPa)* Annealed on requestPhysical properties (reference values)
Thermal expansion coefficient (10–6/K) | 20–100 °C 11.6 | 20–250 °C 12.8 | 20–500 °C 14.3 |
Thermal conductivity (W/mK) | 20 °C 34.0 | 250 °C 33.5 | 500 °C 33.0 |
Young’s modulus (GPa) | 20 °C 212 | 250 °C 197 | 500 °C 175 |