Send Message
Contact Us

Contact Person : Kevin Yin

WhatsApp : +8613812837333

Free call

1.2311 Plastic Mold Steel 3Cr2Mo P20 ASSAB-618 400≥

Minimum Order Quantity : 25MT Packaging Details : Seaworthy way of packing
Delivery Time : 30 DAYS Payment Terms : L/C, T/T,
Supply Ability : 40000MT/MONTH
Place of Origin: CHINA Brand Name: LONGTENG
Model Number: thickness ≥400

Detail Information

Material: P20 Product Name: Plastic Mold Steel
Model: Thickness≤400 Size: 400mm-700mm
Application: For Electrical Enclosures, Automotive Interiors
High Light:

Electrical Enclosures P20 Plastic Mould Steel


1.2311 Plastic Mold Steel


3Cr2Mo Plastic Mold Steel

Product Description

1.2311 MOLD STEEL 


Standard: equivalent to China 3Cr2Mo, Sweden (ASSAB) 618, United States P20, Japan (Hitachi) HPM2


1.2311 mold steel has good comprehensive mechanical properties, high hardenability, and good polishing performance. It can achieve relatively uniform hardness for large-section steel (with a maximum pre hardening thickness of 700mm), which not only ensures the performance of the mold, but also reduces the production cycle and cost of the mold.


Main application: mainly used for molds with high surface finish requirements (such as home appliance shells and automotive interiors)
Ornaments, etc.), this steel grade is suitable for making large and medium-sized plastic molds.


Chemical composition

规格 (厚度) C Si Mn P S Cr Mo Cu Ni
厚度≤400 0.30-0.40 0.40-0.60 1.30- 1.60 ≤0.020 ≤0.010 1.70-2.00 0. 15-0.50 ≤0.20  
厚度≥400 0.30-0.40 0.40-0.60 1.30- 1.60 ≤0.020 ≤0.010 1.70-2.00 0.25-0.50 ≤0.20 ≤0.50


Physical properties: the physical properties of 1.2311 steel are shown in the table below, with its density of 7.81Kg/m3, elastic modulus (room temperature) E: 21200MPa, trimming modulus (room temperature) G: 825x103 MPa, and Poisson's ratio's ratio u: 0.288.


Supply hardness: pre hardened (quenched and tempered): HRC28-35


Heat treatment

Heat treatment after forging (normalizing+tempering)

Normalizing heating temperature℃ Normalized cooling method tempering temperature/℃ Tempering cooling method Notes
850-900 Air cooling/wind cooling 650-700 wind cooling Properly increase the normalizing heating rate (refine grain size)


1.2311 Plastic Mold Steel 3Cr2Mo P20 ASSAB-618 400≥ 0

X100 (grain size): Grade 7

1.2311 Plastic Mold Steel 3Cr2Mo P20 ASSAB-618 400≥ 1

X100 (grain size): Grade 7.5

1.2311 Plastic Mold Steel 3Cr2Mo P20 ASSAB-618 400≥ 2

X500 (microstructure): Tempered Soxhlet


  1. No sand hole;
  2. No scratches;
  3. Very few non-metallic materials;
  4. Homogeneous structure (no segregation, etc.)
  5. Fine crystal grain size (no coarse grain);
  6. Appropriate hardness;
  7. Appropriate mechanical properties.


You Might Be Into These
Get in touch with us

Enter Your Message