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1.2738 P20 40CrMnNiMo8-6-4 2738 Plastic Mould Steel Plate

1.2738 P20 40CrMnNiMo8-6-4 2738 Plastic Mould Steel Plate
group name
Plastic Mould Steel Plate
Min Order
1 piece
brand name
fushun
model
1.2738
Nearest port for product export
Tianjin, Qingdao, Shanghai, Huangshi
Delivery clauses under the trade mode
FOB, CFR, CIF, CIP, CPT, DDP, DDU, DAF
Acceptable payment methods
T/T, L/C, D/P D/A
update time
Thu, 14 Oct 2021 14:28:22 GMT

Paramtents

  • Surface condition Black, Machined

  • Delivery conditon Hot rolled, Cold rolled

Packging & Delivery

  • Min Order1 piece

Briefing

1.2738 P20 40CrMnNiMo8-6-4 2738 Plastic Mould Steel Plate

Detailed

Introduction:

1.2738 Pre-hardened Plastic Mould Steel, hardness in as-delivered condition 280 to 325 HB. Good machinability, suitable for texturing, improved through hardening in comparison to 1.2311, good polishability.

Applications:

Large plastic moulds with deep engravings and intensive impacts on the core. 1.2738 Pre-hardened Plastic Mold Steel is the logical development of 1.2311, a pre-hardened plastic mould steel for use in large moulds, which also have to display high core strength. The additional nickel content of 1 % increases through hardening. 1.2738 is a micro-alloyed, vacuum-degassed steel with the following excellent features: good machinability, outstanding polishability, good texturing properties.

Chemical Composition(%):

Grade

C

Si

Mn

p

S

Cr

Ni

Mo

1.2738

0.35-0.45

0.20-0.40

1.30-1.60

0.030 max

0.030 max

1.80-2.10

0.90-1.20

0.15-0.25

Product Details:

Quality Standard: GB, ASTM

Similar Grade: 1.2738 P20+Ni 718

Size Range:Thickness1-3.5mm   Width:800mm 

Surface Condition: Bright

Delivery condition: Cold rolled only

Heat Treatment :

Annealing: Annealing temperature: 710 ~ 740 °C, holding time is decided by the thickness of the DIN 1.2738 die steel, one hour per 25mm. Colding in furnace after thermal insulation.


Destressing: Heating temperature: 600 °C (annealed condition), 550 °C (quenching and tempering state), holding time is decided by the thickness of the 1.2738 steel, one hour per 50mm. Colding infurnace after thermal insulation.


Quenching and tempering:
Preheating temperature 500 ~ 600 °C, quenching temperature 840 ~ 880 °C, holding 30min (the mold have to quenching in the protective gas to prevent oxidation and decarbonization). Oil cooling, cooling to 50 ~ 70 °C,immediately tempered. Tempering holding time is decided by the thickness of the 1.2738 steel mould, one hour per 25mm, at least 2h. Tempering temperature: 180 °C / 200 °C / 300 °C / 400 °C / 500 °C / 600 °C, the hardness: 52HRC / 51HRC / 48 HRC / 46HRC / 42HRC / 34HRC.