Changshu Longteng Special Steel Co., Ltd.
LONGTENG WELDING CONSUMABLES WELDING THE GLOBAL
Add to Cart
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) |