CHEMICAL COMPOSITION

EST DIN ASTM CHEMICAL COMPOSITION PROPERTY APPLICATION
C Si Mn P≤ S≤ Cr Mo V Ni
YTG136 1.2083   0.36-0.42 ≤ 1.0 ≤ 1.0 0.030 0.030 12.50-14-50   ≤ 0.20 (0.60) supreme polishability, good corrosion resistance, and good wear resistance. material of choice for the manufacture of plastic molding tools that require the highest lens-quality polished fi nishes molds for compact disks (CDs), medical laboratory equipment, optical lenses, and other components, which require critical surface fi nishes.
YTG173 1.2316   0.33-0.45 ≤ 1.0 ≤ 1.50 0.030 0.030 15.5-17.5 0.80-1.30 - ≤ 1.00 high cleanliness/homogeneity, powerful in resistant to rust and corrosion, good polishability, usually supplied in quenched and tempered condition with a working hardness of approximately 300 HB. For Mould with strong corrupt resisting used for camera lens, Dies for pressing chemically aggressive compounds
YTJ20A 1.2311 P20 0.35-0.45 0.20-0.40 1.30-1.60 0.030 0.030 1.80-2.10 0.15-0.25 - - Prehardened plastic mold steel, hardness in as-supplied condition 280-320 HB that is characterized by good toughness at moderate strength level good polishability and etching ability, adequate corrosion resistance, and cost effi cient machining properties. Plastic molds, Mold frames for plastic molds and pressure casting dies, Heated recipient casings and tooling and for die casting dies for zinc.
YTJ21 1.2738 P20+Ni 0.35-0.45 0.20-0.40 1.30-1.60 0.030 0.030 1.80-2.10 0.15-0.35 - 0.90-1.20 Prehardened plastic mold steel, hardness in as-supplied condition 280-320 HB The high nickel content (1%) is specially adapted to ensure a perfect homogeneity of structure and hardness through thickness even for very thick blocks, good polishability, adequate corrosion resistance, good machinability. Large size Plastic Injection and blow moulding dies, mould frame for pressure casting dies, Heated recipient casings

HEAT TREATMENT

EST DIN ASTM Density (g/cm3) HEAT TREATMENT
Soft Annealing °C Annealed Hardness HB Hardening From °C Quenching In Hardened Hardness HRC Tempering °C
100 °C 2400 °C 300 °C 400 °C 500 °C 550 °C 600 °C
HRC HRC HRC HRC HRC HRC HRC
YTG136 1.2083   7.75 750-800 Max. 255 1000-1050 Oil, Hot Bath 500-550 °C 54 54 53 52 52.5 52.5 50 45
YTG173 1.2316   8.1 790-840 Max. 265 1200-1220 Oil, Hot Bath 500-550 °C 52 48 47 46 46 47 42 34
Pre-hardened steel, hardness in as-supplied condition 300-340 HB (HRC 34-38)
YTJ20A 1.2311 P20 7.80 710-740 Max. 235 840-870 Oil, Hot Bath 180-220 °C 52 51 50 48 46 42 39 36
Pre-hardened steel, hardness in as-supplied condition 280-320 HB (HRC 29-35)
YTJ21 1.2738 P20+Ni 7.80 710-740 Max. 235 840-870 Oil, Hot Bath 180-220 °C 52 52 51 48.5 46 42 38 33
Pre-hardened steel, hardness in as-supplied condition 280-320 HB (HRC 29-35)