Guangzhou Changfeng Steel Co., LTD
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Prehardened (HRC33-37) 1.2738 718H Plastic Mould Steel Flat Bar
DIN 1.2738 Forged Plastic Mould Steels
Pre-hardened large size injection mould, can be pollished normally.Used for making high demand large size plastic mould.
1, Features
A, uniform hardness qualitative of Material;
B, No quenching crack danger,Without heat treatment costs that can reduce the tool cost;
C, Excellent polishing performance;
D, Good machining performance;
2, Application
Used for various large -sized mirror plastic mould,percision mould;
A, Leather grain, pear skin grain etching, imitation stone moulds;
B, Clear plastic container classes such as pencil case, commodity high gloss mould;
C, Such as refrigerator, air conditioner production to demand higher large mould;
3, Grade
| GB | AISI | DIN |
| 3Cr2NiMnMo | P20+Ni | 1.2738 |
4, Chemical composition(%)
| C | Mn | Si | Cr | Ni | Mo | P | S |
| 0.35-0.45 | 1.30-1.60 | 0.20-0.40 | 1.80-2.10 | 0.90-1.20 | 0.15-0.25 | ≤0.03 | ≤0.03 |
5, Mechanical Properties
| Hardness | Y.S.(0.2%) | UTS | Elongation | RoA | Elastic Modulus | |||
| HB | Mpa | KSI | Mpa | KSI | % | Z% | GPA | KSI |
| 300 | 826 | 120 | 993 | 145 | 17 | 59 | 205 | 29745 |
6, Hardness:33-37HRC
7, Packing:Standard export packing or according to customers' request
8, The process flow
1) Hot rolled or forged condition, Pre-hardened &tempering, black surface
2) Hardness:30~36HRC
3) Hot rolled technology:EAF+LF+VD
Forged technology:EAF+LF+VD+ESR+Forging +QT + Machined surface
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