SW718H-P Pre-hardened plastic mold steel

Product Details

Manufacturing Process

Electric furnace or converter smelting (EF or LD) → ladle refining (LF) → vacuum degassing (RH or VD) → argon protection ingot → multi-directional forging → high temperature normalizing + hydrogen expansion annealing heat treatment → ultrasonic pre-defect detection → pre-hardening heat treatment (quenching + tempering) → finished product inspection → qualified label storage

Applications

  • Various plastic molds with mirror polishing or photoetching requirements; electronic and office plastic product molds, such as: TV housing, washing machine cylinder, copier, etc.

  • Plastic molds for automotive interior parts, such as: bumpers, dashboards, interior door panels, engine hoods, etc.

Product Characteristics

  • Excellent hardness uniformity

  • High purity

  • The material is produced with a large forging ratio, and the core of the material is dense

  • Excellent polishing and etching performance

  • Pre-hardening, no quenching required, directly used in mold cavity manufacturing, shortening the mold processing cycle and reducing costs

Brand Comparison Table
SW718H-PGerman DINAISIASSAB, SwedenJapanese Datong
1.2738P20+Ni718、718H、718HHPX5
Chemical Composition
SWV718H-PCSiMnCrNiMo
0.360.301.301.801.000.30
Supply Specifications and Supply Hardness
ThickWidthLongHardness RangeUltrasonic Flaw Detection
≤1200mm≤1800mm1500mm~6000mm30~36HRC、36~42HRCSEP1921-1984 E/e Level
Physical Properties

Linear Expansion Coefficient
10-6m/m * ℃

20~100℃20~200℃20~300℃

Thermal Conductivity
W/(m.k)

20℃350℃700℃
11.112.913.434.533.432.0
Purity
Type A (Sulfide)Type B (Sulfide)Type C (Silicate)Type D (Oxide)
Thin≤2.0Coarse≤1.5Thin≤2.0Coarse≤1.5Thin≤1.0Coarse≤0.5Thin≤1.5Coarse≤1.5
Heat Treatment