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| Tensile strength | 685～695 | σb/MPa |
| Yield Strength | 207 | σ 0.2 ≥/MPa |
| Elongation | 73 | δ5≥(％) |
| ψ | - | ψ≥(％) |
| Akv | - | Akv≥/J |
| HBS | 495～904 | - |
| HRC | 30 | - |
| Thermal expansion | 15-83 | e-6/K |
| Thermal conductivity | 72-17 | W/m.K |
| Specific heat | 450-460 | J/kg.K |
| Melting temperature | 6400-7180 | 째C |
| Density | 7559-8318 | kg/m3 |
| Resistivity | 0.50-0.60 | Ohm.mm2/m |
| Steel Grade | Specification | Processing range(mm) |
| AISI 684 Special Alloy | Round Bar and Hollow Bar | Φ1 to Φ2000 |
| Square and Flat Steel | Φ10 to Φ100 | |
| Plate and Sheet | 0.08-800(Thickness)*10-1500(Width)*Length | |
| Tube or Pipe | OD:Φ4-410; WT:1-35 mm; Lenght:10-12000 | |
| Coil and Strip Steel | THK:0.1mm Width:1500mm | |
| Forged | Ring/Cylindrical/Disk |
