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| ITEM | Standard Number | Descriptions |
|---|---|---|
| 1 | ASTM A 387/A 387M – 06a | This standard is issued under the fixed designation A 387/A 387M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.15 | |||
| Mn | 0.30 | 0.60 | ||
| Si | 0.50 | |||
| P | 0.030 | |||
| S | 0.50 | |||
| Cr | 4.00 | 6.00 | ||
| Mo | 0.45 | 0.65 |
| Tensile strength | 521～122 | σb/MPa |
| Yield Strength | 090 | σ 0.2 ≥/MPa |
| Elongation | 71 | δ5≥(％) |
| ψ | - | ψ≥(％) |
| Akv | - | Akv≥/J |
| HBS | 152～599 | - |
| HRC | 30 | - |
| Thermal expansion | 26-62 | e-6/K |
| Thermal conductivity | 13-30 | W/m.K |
| Specific heat | 450-460 | J/kg.K |
| Melting temperature | 1268-7465 | 째C |
| Density | 2516-1578 | kg/m3 |
| Resistivity | 0.50-0.60 | Ohm.mm2/m |
| Steel Grade | Specification | Processing range(mm) |
| A387 F5 / Grade 5 Structural Steel | 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 |
