Chemical composition
C | Si | Mn | P | S | Cr | Mo | Ni | Cu | V |
0.95-1.04 | ≤0.35 | ≤0.4 | ≤0.035 | ≤0.030 | ≤0.25 | ≤0.20 | ≤0.20 | ≤0.25 | ≤0.02 |
Equivalent Grades of Steel
USA | European | Japan | France | England | China | Inter |
UNS | DIN | JIS | NF | BS | GB | ISO |
T72301 | 1.1535 1.1545 | SK3 SK4 | C105E2U | 1407 | T10
| C105 |
Mechanical properties
- Tensile strength:1792 MPa
- Tensile Strength, Yield:1482MPa
- Elongation:8%
- Modulus of elasticity: 207 GPa
- Poisson’s ratio: 0.27-0.3
Application
- Samurai sword
- Screw dies
- Turning tools and plane cutter
- Wire drawing dies
- ForHand-saw bladesging die
Heat treatment conditions
- FORGING: H11 hot work steels are forged at 1121°C (2050°F). For this type of steels, forging below 899°C (1650°F) is not preferable.
- ANNEALING: H11 hot work steels are annealed at 871°C (1600°F) and slowly cooled at 4°C (40°F) in the furnace.
- HARDENING: Preheat to 1500 F and then heat to 1850 F and hold for 15 to 40 minutes. Air cool (air quench).
- TEMPERING: Tempering is carried out on H11 tool steels at temperature ranging from 538 to 649°C (1000 to 1200°F) to obtain Rockwell C hardness of 54 to 38. Double tempering can also be performed in these steels every one hour at the preferred tempering temperature