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Eternal
P20 mould steel is currently the most versatile and best value-for-money pre-hardened mould steel in the plastics moulding industry.
The P20 mould steel forgings produced by Jiangyin Eternal Heavy Industry Co., Ltd. are manufactured using a solid forging process from steel ingots; unlike ordinary rolled sheets, they feature a dense internal structure free from porosity, inclusions or air pockets.
The products are supplied having undergone tempering and pre-hardening treatment, with a stable hardness of 28–32 HRC. Mould manufacturers do not need to carry out secondary quenching.The forgings can be directly subjected to rough milling, finish milling, polishing and texturing, thereby significantly shortening the mould production cycle and completely resolving common issues such as delamination in thick plates, pitting during polishing, machining deformation and dimensional drift in the later stages.
We support the delivery of large-sized monoblock forgings, non-standard irregular mould blanks and finished products with six-sided precision grinding. These are widely used in various plastic injection moulds for household appliances, automotive components, electronics and consumer goods.
Item | Data |
Name | P20 die steel forgings, forged modules for plastic moulds |
Hardness | 28-32HRC（Pre-Hardening） |
Condition | Forged blank, rough-milled blank, six-sided precision grinding, finished product |
Dimension | width: within 1800mm , thickness: within 600mm, unit weight : within 20 tons |
Inspection | Spectral composition analysis, ultrasonic testing (UT), multi-point hardness testing, and full dimensional inspection |
Application | Injection moulds, household appliance moulds, automotive plastic moulds, electronic casing moulds, blow moulds |
Lead time | 10-20 workdays |
C | Cr | Mn | Mo | Si | S/P |
0.28-0.40 | 1.40-2.00 | 0.80-1.20 | 0.20-0.40 | 0.20-0.40 | ≤0.03 |
We deliver superior mold steels through integral forging, ready-to-use pre-hardened condition, and tailor-made sizes—ensuring reliability, efficiency, and precision..
Repeated upsetting and drawing processes break down the internal loose grains, resulting in high material purity; the mirror-finish polish is free from pinholes and pitting, with a uniform and fine grain pattern, making it suitable for moulds for high-end cosmetic plastic parts.
Pre-hardened to the required hardness at the factory, with uniform and stable hardness, eliminating the need for customers to carry out quenching and tempering. This prevents heat treatment-induced deformation, cracking and rework due to straightening, thereby significantly improving mould-making efficiency.
We supply forged blanks, rough-milled blanks, six-sided precision-ground blanks and finished products, in accordance with customer requirements.We offer customized dimensions with a maximum width of 1,800 mm, a maximum thickness of 600 mm, and a maximum unit weight of 20 tons to accommodate diverse mold design requirements
• Household appliance moulds: injection moulds for the casings of televisions, air conditioners, washing machines and small household appliances
• Automotive plastic moulds: moulds for interior trim components, door panels, dashboards and plastic components for vehicle lights
• Electronics moulds: moulds for chargers, remote controls, power banks and precision plastic structural components
• Consumer packaging moulds: moulds for cosmetics cases, storage boxes, bottle caps and plastic containers
• Blow moulding and extrusion moulds: moulds for plastic bottles, pipes and profiles
What is the difference between P20 forgings and standard rolled sheets?
Rolled sheets are only suitable for thin materials; thick sheets are prone to delamination, porosity and polishing blisters. P20 forgings undergo multi-directional forging, resulting in a dense and uniform internal structure. When used in thick-walled moulds, they offer far superior polishing, surface finish and stability compared to rolled sheets, making them suitable for high-quality, large-scale moulds.
Does P20 require heat treatment?
How should one choose between P20 and 718H?
Will the forgings warp after machining?
Can you provide formal acceptance documentation for factory audit purposes?
