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718H /1.2738/P20+NI Hot Rolled Plate Plastic Mould Steel Material
718H Mould Steel Bar
718H is a vacuum-melted chromium-nickel-molybdenum alloy steel that
has been quenched and tempered before leaving the factory.
Advantages: no risk of quenching cracks and heat treatment; no need
for heat treatment; reduced cycle time; cost (e.g. deformation
without flower bridges); easy mold modification; .
718H steel is a pre-hardened mirror acid-resistant plastic mold
steel. The steel is pre-hardened, the material is uniform, the
cleanliness is high, and the polishing performance and
photolithography performance are excellent. It also has high
hardenability, good electromachinability and graining performance.
The die hole can also be made of unquenched pre-hardened steel, the
flange can be flame quenched, and the hardness can be increased to
52HRC.
China National Standard Steel Grade 3Cr2NiMo;
German DIN standard material steel number 2738;
Swedish Assab ASSAB standard steel grade 718;
American AISI/SAE standard steel P20 optimization;
Japan JS standard steel SNCM optimization;
International Organization for Standardization ISO standard steel
35CrMo2.
718H plastic mould steels chemical composition (only for reference) (%) :
Element | C | Si | Mn | P | S | Cr | Mo | Ni |
Min | 0.35 | 0.2 | 1.3 | 1.8 | 0.15 | 0.9 | ||
Max | 0.46 | 0.4 | 1.6 | 0.035 | 0.005 | 2.2 | 0.25 | 1.2 |