Description
Plastic mold steel-1.2311 Special Offer Premium Material
DIN 1.2311 Steel Plate Material is a versatile, low-alloy tool steel that is characterized by good toughness at moderate strength levels. The special purpose mold steel 1.2311 steel plate is commonly used for plastic injection mold cavities and tooling and for die casting dies for zinc. 1.2311 mold steel plate material is typically sold in the pre-hardened condition at a hardness of approximately 300 HBW.
1.2311 tool steel in the different countries. Europeans generally use the DIN spec-DIN EN ISO 4957 standard materials (1.2311 and 1.2312), USA(American) is AISI P20, while in Japan steel industry standard, PX5 is the new standard 1.2311. And the Germany Countries, Grade steel 1.2311 is the most and wide used steel grade material. In China, 3CrM2Mo is the 1.2311 steel grade equivalent, which is in the standard GB/T 1299 tool steel specification.
AISI P20/ Din 1.2311 tool steels are nitride or carburized. These 1.2311 mold steel materials steels are capable of being machined into complex and large dies and molds. Material 1.2311 steel plate and round bars are mostly used in the carburized condition. The presence of chromium and nickel enhances the toughness and hardness of mold steel 1.2311 grade material.
1. Supply Range of P20/ 1.2311 Steel
Round Bar: diameter 200mm – 1000mm
Steel Plate: thickness 16-800mm x width 200-2300mm
Surface Finish: Black, Rough Machined, Turned or as per given requirements.
2. Relevant 1.2311 Tool Steel Specification and Equivalent Steel Grades
| Country |
USA |
German |
GB/T |
| Standard |
ASTM A681 |
DIN EN ISO 4957 |
GB/T 1299 |
| Grades |
P20 |
1.2311 |
3Cr2Mo |
3. Din 1.2311 Steel Plate Materials
| ASTM A681 |
C |
Mn |
P |
S |
Si |
Cr |
Mo |
| P20 |
0.28 |
0.4 |
0.6 |
1 |
0.03 |
0.03 |
0.2 |
0.8 |
1.4 |
2 |
0.3 |
0.55 |
| DIN ISO 4957 |
C |
Mn |
P |
S |
Si |
Cr |
Mo |
| 1.2311 |
0.35 |
0.45 |
1.3 |
1.6 |
0.03 |
0.03 |
0.2 |
0.4 |
1.8 |
2.1 |
0.15 |
0.25 |
| GB/T |
C |
Mn |
P |
S |
Si |
Cr |
Mo |
| GBT 1299 |
0.28 |
0.4 |
0.6 |
1 |
0.03 |
0.03 |
0.2 |
0.8 |
1.4 |
2 |
0.3 |
0.55 |
4. Din 1.2311 Mold Tool Steel Properties
Physical Properties
- Density: 0.284 lb/in3 (7861 kg/m3)
- Specific Gravity: 7.86
- Modulus of Elasticity: 30 x 106 psi (207 GPa)
- Thermal Conductivity:
- 24 Btu/ft/hr/°F
- 41.5 W/m/°K
- Machinability: 60-65% of a 1% carbon steel
1.2311 plastic mold Steel Mechanical Properties
| Properties |
Metric |
| Hardness, Brinell (typical) |
300 |
| Hardness, Rockwell C (typical) |
30 |
| Tensile strength, ultimate |
965-1030 MPa |
| Tensile strength, yield |
827-862 MPa |
| Elongation at break (in 50 mm (2″)) |
20.00% |
| Compressive strength |
862 MPa |
| Charpy impact (V-Notch) |
27.1-33.9 J |
| Poisson’s ratio |
0.27-0.30 |
| Elastic modulus |
190-210 GPa |
DIN 1.2311 Mold Tool Steel Thermal Properties
| Properties |
Conditions |
| T (°C) |
Treatment |
| Thermal expansion |
12.8 x 10-6/ºC |
20-425 |
– |
5. Forging of 1.2311 Steel Plate Mold Steel
DIN 1.2311 steel plate and round bars materials are forged at 1093°C (2000°F) down to 899°C (1650°F). Forging below 871°C (1600°F) is not recommended for these steels 1.2311 material.
6. Heat Treatment of Tool Steel 1.2311 steel /P20 material
Preheating: The mold steel 1.2311 steel plate is sold in a pre-hardened condition, hardening heat treatment is not necessary. After machining and intermittently during service, the steel must be thermally stress relieved by heating to 900ºF (482ºC), equalizing and holding for one hour per inch (25.4mm) of thickness, and cooling in air to ambient temperature.
In those rare circumstances where the DIN steel 1.2311 Plastic mold steel must be re-hardened, the steel must first be annealed prior to hardening.
Critical Temperature: Ac1: 1405ºF (763ºC)
Preheating of 1.2311 steel metal: Heat at a rate not exceeding 400ºF per hour (222ºC per hour) to 1150-1250ºF (621-677ºC) and equalize.
- Austenitizing (High Heat)
Heat rapidly from the preheat to 1550ºF (843°C). Soak for 30 minutes for first inch (25.4mm) of thickness, plus 15 minutes for each additional inch (25.4mm).
Pressurized gas, or interrupted oil to 150-125ºF (66-51ºC).
For oil, quench until black, at about 900°F (482°C), then cool in still air to 150-125°F (66-51°C).
P20 tool steels are tempered at 482-593°C (900 to 1100°F) for a Rockwell C hardness of 37 to 28.
Annealing for din 1.2311 tool steels takes place at 760-788°C (1400 to 1450°F) and then the steels are cooled slowly in the furnace at a temperature less than 4°C (40°F) per hour.
7. Applications of 1.2311 Steel Plate or Bar
1.2311 tool steels are used for low temperature applications that include injection molds and die casting dies. Main applications of DIN 1.2311 steel plate and bar:
Plastic mould, die holder, backers, ramus for plastic pressure dies, hydro forming mold tools. bolsters, die holders. Also suitable for other applications such as rails, shafts and wear strips.
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