40 CrMnNiMo 8-6-4
≈P20 + Ni
SM-2738, prehardened 280 - 325 HB, grade specially designed for plastic mold industry.Chromium, Molybdenum, Manganese and Nickel additions are optimized to have a fully martensite-bainite microstructure after quenching. The steel is melted in an electrical furnace and refined with VOD or DH device. The cleanliness of the seteel is guaranteed as well as the soundness. This makes the steel particularly well adapted for mold Steel even when polishing or chemical etching are required for surface finish quality.
Typical applications for 2738 grade are: • Plastic injection molds for thermoplastics. • Extrusion dies for thermoplastics • Compression molds.