W218H Japanese plastic mold steel
Product Details
Manufacturing Process
300-ton converter (LD) → ladle refining (LF) → vacuum degassing (RH)] or [40-ton electric furnace EAF-LF-VD] → hydrogen protection ingot casting → multi-directional concave forging → normalizing + hydrogen expansion annealing → ultrasonic pre-defect detection → quenching + tempering pre-hardening → finished product inspection → qualified label storage
Product Features
Blast furnace hot metal steelmaking, high purity close to electroslag grade
Delivery in normalized state, fine grains, good hardness uniformity
Good machining performance
Product Use
General requirements for plastic product molds
Undemanding automotive interior and exterior plastic molds
Brand Comparison Table
| SW218H | Buderus, Germany | Japan | Japanese Datong |
| SPM1 | SD18T | PXZ |
Chemical Composition
| SW218H | C | Si | Mn | Cr |
| 0.55 | 0.35 | 0.60 | 0.40 |
Supply Specifications and Supply Hardness
| Thick | Width | Long | Hardness range | Ultrasonic sound detection level |
| ≤1200mm | ≤1650mm | No Restrictions | 180~255HBW | En10228 - 3class3 |
Purity
| Type A (Sulfide) | Type B (Aluminate) | Type C (Silicate) | Type D (Oxide) | ||||
| Thin：1.0 | Coarse：0.5 | Thin：1.0 | Coarse：0.5 | Thin：0.5 | Coarse：0.5 | Thin：1.0 | Coarse：0.5 |
