HI-PM 31
( AISI-D2 / DIN X153CrMoV12 / W-Nr. 1.2379 / JIS-SUS420J2 )
Chemical composition (%) ( typical )
| Std. | AISI | DIN | W-Nr. | JIS | YSS |
|---|---|---|---|---|---|
| Designation | D2 | X153CrMoV12 | 1.2379 | SUS420J2 | HI-PM 31 |
| C | 1.40-1.60 | 1.45-1.60 | 1.45-1.60 | 0.26-0.40 | 0.90 |
| Si | 0.30-0.50 | 0.10-0.60 | 0.10-0.60 | <=1.00 | 0.70 |
| Mn | 0.30-0.50 | 0.20-0.60 | 0.20-0.60 | <=1.00 | 0.50 |
| Ni | - | - | - | - | - |
| Cr | 11.0-13.0 | 11.0-13.0 | 11.0-13.0 | 12.00-14.00 | 7.00 |
| Mo | 0.70-1.20 | 0.70-1.00 | 0.70-1.00 | - | 1.10 |
| W | - | - | - | - | - |
| V | (0.80) | 0.70-1.00 | 0.70-1.00 | - | 0.40 |
| Co | - | - | - | - | - |
| others | - | - | - | - | 0.00 |
Standard Heat Treatment temperature ( centigrade )
| Annealing | 800- 850 Slow cooling |
|---|---|
| Quenching | 1,030 Air-cooling |
| Tempering | 480 Air-cooling |
| Delivery hardness ( HBW ) | 248HBW or under |
| Hardening hardness ( HRC ) | 58 over |
Application
| Wear resistant mold for engineering resin (Gear, Connector, IC) |
YSS Recommended Tool Steels
| YSS Symbol | Features |
|---|---|
| HI-PM MAGIC | Prehardened: 37 - 41HRC Plastic Mold Steel for general purposes |
| CENA 1(TM) | Prehardened: 37 - 42HRC, High Performance Plastic Mold Steel with rust resistivity and excellent machinability. |
| CENA(TM)-V | Prehardened: 35 - 41HRC, Advanced Plastic Mold Steel corresponding to the good stain resistance and high-quality mirror surface polishing. |
| HI-PM PRO | Prehardened: 37 - 41HRC Precipitation Hardening, Rust-Resisting Grade for Precise Mold |
| HI-PM 7 | Prehardened: 29 - 33HRC For Medium and Large Mold for General Application |
| HI-PM 38 | Prehardened: 29 - 33HRC Hardenable to: 50 - 55HRC For Anti-Corrosion and Mirror Polish Mold |
| HI-PM 38S | Prehardened: 29 - 33HRC Hardenable to: 50 - 55HRC For Super Mirror Polish Mold |
| PSL(TM) | Prehardened: 33 - 37HRC(Flat bar) 38 - 42HRC(Round bar) For Higher Grade Anti-Corrosion Mold |
| HI-PM 77 | Prehardened: 29 - 33HRC Free Machining Martensitic Stainless Grade for Mold Base |
| HI-PM 31 | Hardenable to: 55 - 60HRC High Wear Resistant Grade for Mass Production |
| YAG(TM) | Hardenable to: 52 - 57HRC Super High Toughness Maraging Steel |
| HI-PM 75 | Hardenable to: 40 - 45HRC Non-Magnetic High Hardness Free Machining Plastic Mold Steel |
YSS Properties Comparison Table
| Grade | Machinability | EDM/Creping texture |
Mirror polishability | Weldability | Rust resistance | Wear resistance | Toughness | Cost |
|---|---|---|---|---|---|---|---|---|
| HI-PM7 | A | C | C | A | D | D | B | B |
| HI-PM77 | B | D | D | C | B | D | C | C |
| PSL(TM) | D | B | C | A | A | D | B | D |
| CENA1(TM) | C | A | B | C | C | D | C | D |
| HI-PM MAGIC | B | B | C+ | A | D | D | B | C |
| HI-PM PRO | B | A | B | B | D | D | C | D |
| HI-PM1 | A | D | D | D | D | D | D | C |
| FDAC(TM) | C | D | D | C | D | C | C | C |
| HI-PM38 | C | A | A | C | B | C | C | D |
| HI-PM38S | C | A | A+ | C | B | C | C | E |
| HI-PM31 | C | A | B | D | C | B | C | D |
| HAP(TM)5R | C | A | B | D | E | B | B | E |
| ZCD(TM)-M | D | A | D | E | C | B | D | D |
| ZDP(TM)4 | E | B | B | E | C | A | E | E |
| HI-PM75 | E | D | D | E | B | C | C | E |
| YAG(TM) | D | A | A | A | D | C | A | E |