ExEll P20M-High HardDownload ExEll P20M-High Hard Spec sheet
P20M High Hard is a higher hardness version (BHN 311-352) of this alloy. The higher hardness level offers greater mold tool wear resistance to abrasive plastic compounds as well as better surface polishing capability.
- P-20 High Hard is a pre-hardened mold steel that has been specially designed for large plastic molds.
- Material is forged on a 5000 ton press assuring maximum deformation during the forging process.
- Supplied hardness of 321—352 HB (34-38 HRC).
- Hardness loss in large cross sections is minimal.
- Improved polishability compared to P-20 modified
- Excellent compressive strength
- Minimal hardness loss in large cross sections
- Injection molds
- Compression molds
- Mold frames
- Forming tools
- Die holders
Density: 0.284 lbs/in3 (room temperature)
|Coefficient of Thermal Expansion|
Room Temperature, hardened and tempered to 321 BHN (34 HRC)
|Yield Strength||Tensile Strength||Elongation||Reduction Area|
|130 KSI||150 KSI||15%||35%|
P-20 High Hard can yield an A-2 surface finish when proper polishing procedures are followed. Caution must be taken to avoid over polishing which lead to orange peel effect and pitting.
Hold 1 hour/inch
|Air Cool||Large cross sections require accurate control of temperatures and times.|
- Heat uniformly and thoroughly at the selected temperature and hold at temperature for one hour per inch of total thickness.
- Tempering harness is approximate and based on two hours at temperature
- Preheat insert to 600°F to 700°F. Maintain temperature above 600°F during welding.
- Use TIG with D.C. positive polarity.
- Depending on the application, various welding rods can be used. P-20 filler which will match the hardness of the base metal after welding and tempering is commonly used. Please contact our heat treatment facility for recommendations.
- Slowly cool sown to 100°F—150°F, preferably under an insulating blanket, before post heat.
- Post heat at 1000°F one hour per inch of weld depth plus one additional hour—double temper if possible. Exceeding 1050°F could result in the loss of hardness.
|Electrode Dia. (mm)||Filler Rod Dia. (mm)||Welding AMPS||Argon Flow Lt/min||Nozzle Dia. (mm)|
All statements regarding the properties or utilization of the materials or products mentioned are for the purposes of description only. Guarantees regarding the existence of certain properties or a certain utilization are only valid if agreed upon in writing.