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| Material | Standard | Country |
| ICI 4340 | AISI | USA |
| 414340 | CSN | Czech Republic |
| 14340 | CSN | Czech Republic |
| 4340 | AS | Australia |
| 4340 | AS | Australia |
| H11 | ASTM | USA |
| H12 | ASTM | USA |
| H14 | ASTM | USA |
| H19 | ASTM | USA |
| H21 | ASTM | USA |
| H22 | ASTM | USA |
| H24 | ASTM | USA |
| H25 | ASTM | USA |
| H26 | ASTM | USA |
| H41 | ASTM | USA |
| H42 | ASTM | USA |
| H43 | ASTM | USA |
| M2 hight C | ASTM | USA |
| M10 Hight C | ASTM | USA |
| CH-12 | ASTM | USA |
| CH-13 | ASTM | USA |
| CPM H13 | AISI | USA |
| CPM H19 | AISI | USA |
| CPM H19V | AISI | USA |
| CPM Rex M2HCHS | AISI | USA |
| CPM Rex M4HS | AISI | USA |
| CPM Rex M35HCHS | AISI | USA |
| CPM Rex 45HS | AISI | USA |
| CPM Rex T15HS | AISI | USA |
| CPM Rex 76HS | AISI | USA |
| HAP 10 | AISI | USA |
| HAP 40 | AISI | USA |
| HAP 50 | AISI | USA |
| HAP 60 | AISI | USA |
| HAP 70 | AISI | USA |
| KHA 33N | AISI | USA |
| 1.2714 | DIN | Germany |
| SKH2 | JIS | Japan |
| SKH3 | JIS | Japan |
| SKH4 | JIS | Japan |
| SKH10 | JIS | Japan |
| SKH40 | JIS | Japan |
| SKH50 | JIS | Japan |
| SKH51 | JIS | Japan |
| SKH52 | JIS | Japan |
| SKH53 | JIS | Japan |
| SKH54 | JIS | Japan |
| SKH55 | JIS | Japan |
| SKH56 | JIS | Japan |
| SKH57 | JIS | Japan |
| Tensile strength | 707～409 | σb/MPa |
| Yield Strength | 907 | σ 0.2 ≥/MPa |
| Elongation | 12 | δ5≥(％) |
| ψ | - | ψ≥(％) |
| Akv | - | Akv≥/J |
| HBS | 554～653 | - |
| HRC | 30 | - |
| Thermal expansion | 97-02 | e-6/K |
| Thermal conductivity | 00-33 | W/m.K |
| Specific heat | 450-460 | J/kg.K |
| Melting temperature | 5082-4139 | 째C |
| Density | 1529-4073 | kg/m3 |
| Resistivity | 0.50-0.60 | Ohm.mm2/m |
| Steel Grade | Specification | Processing range(mm) |
| 4340 H 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 |
