Hot Rolled Alloy Steel Flat Bar 1.2738 AISI P20+Ni 718H Black
Surface
DIN 1.2738 is specially used for Plastic injection die moulds. The
characteristics of a material are right sharpening, photo-etching
properties with high purity and good homogeneity. DIN 2738 is
upgraded version of plastic mold steel 0f 2311, which normally
supply in Pre hardened condition. Hardness in as supplied condition
280-320 HB with having uniform hardness. The additional nickel
content of 1 % increases through hardening. It has good
machinability, suitable for Texturing, fine polishability, adequate
corrosion resistance, vacuum-degassed steel.
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. Available Size (mm)
Flat Bar Size(mm) | Round bar Size(mm) |
Thickness | Width | Length | Diameter | Length |
21-300 | 155-2200 | 2000-6000 | 20-200 | 2000-6000 |
4, Grade
GB | AISI | DIN |
3Cr2NiMnMo | P20+Ni | 1.2738 |
5, 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 |
6, 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 |
7, Hardness: 33-37HRC
8, Packing: Standard export packing or As per request.
9, Delivery:
Abundant stock, 7-15 days.
Customized products, 30-50 days.
10, The process flow
a, Hot rolled or forged condition, Pre-harden &tempering ,
black surface
b, Hardness: 30~36HRC
c, Hot rolled technology:EAF+LF+VD
d, Forged technology: EAF+LF+VD+ESR+Forging +Q T + Machined surface