Standard Pre-hard Mirror Plastic Mould Plate
DIN1.2738/JIS718H/AISIP20+Ni
Product Introduction
718H is a vacuum-melting chromium-nickel-molybdenum alloy steel
that has been hardened and tempered before it leaves the factory.
It offers the following advantages: No risk of quench cracking and
heat treatment; no need for heat treatment; shorten the cycle time;
Cost (for example, without overseas Chinese is deformation); easy
to amend the mold; nitriding and surface hardening can be applied
to improve the mold surface hardness and wear resistance.
718H steel is pre-hard mirror anti-acid plastic mould steel. The
steel pre-hardened, uniform material, high cleanliness, excellent
polishing performance and lithography. Also has high hardenability,
good electrical processing performance and striae processing
performance. Pre-hardened steel without quenching can also be used
for the mold bore, flange flame hardening can be implemented, the
hardness can be increased to 52HRC.
Features
1. Good machining performance
2. 2. Excellent polishability
3. 3. Uniform hardness
4. 4. High hardenability
Similar Standards
| Chinese | American | German | Japanese | Swedish |
| GB | AISI | DIN | JIS | ASSAB |
| 3Cr2NiMnMo | P20+Ni | 1.2378 | PDS5S | 718 |
Chemical Composition
| Grades | C | Si | Mn | P | S | Mo | Ni |
| 1.2738 | 0.35-0.46 | 0.2-0.4 | 1.3-1.6 | ≤0.035 | ≤0.005 | 0.15-0.25 | 0.9-1.2 |
| 718/3Cr2NiMnMo | 0.28-0.40 | 0.2-0.8 | 0.6-1.0 | ≤0.030 | ≤0.030 | 0.30-0.55 | 0.8-1.2 |
| P20+Ni | 0.32-0.40 | 0.2-0.4 | 1.0-1.5 | ≤0.030 | ≤0.035 | 0.30-0.55 | 0.8-1.2 |
Heat Treatment
| Quenching | Tempering |
| Heating Temperature/℃ | Cooling | Hardness/HRC | Heating Temperature/℃ | Cooling | Hardness/HRC |
| 840-870 | Air | ≥50 | 550-640 | Air | 28-36 |
General Applications
1. 1 Skin, pear skin, imitation stone etching mold.
2. 2. Transparent plastics such as pencil cases, daily necessities
containers, high gloss requirements mold.
3. 3. Particularly suitable for hard rubber (PS) and non-fragmented
rubber (ABS) parts.
4. 4. Automobile bumpers, interior parts, refrigerators, air
conditioners, etc.
Stock Size
| steel plate | Hot Rolled | Thickness | 20-150mm |
| Width | 2200mm |
| Length | 2000-8000mm |
| Hot Rolled | Thickness | 155-300mm |
| Width | 1600mm |
| Length | 4000-8000mm |
| steel block | Thickness | 300-1000mm | |
| Width | 800-1600mm | |
| Length | 2000-6000mm | |
Why choose us?
Quality Assurance from government owned steel mills
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In order to realise competitive products to fulfil our customers'
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management system is continuously being improved and developed
further. We document this for our customers by having our quality
management system certified in accordance with ISO 9001. This
measure is accompanied by audits and recertification's on a
regularly prescribed basis.
Our service
We provide quality special steel for all industries.
Orders of any size, any length, ship fast
We carry a unique inventory of specialty special steel
Provide related value-adding services :
metal cutting, sizing, machining (blanking, milling, grinding), and
heat treatment.
Sawing for small or large quantities, sawing-to-size.
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