France · AFNOR NF
13 MF 4
NF A35-562 — Heat treated free-cutting special steel—Bars and wire rods drawing—Types
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.1 | 0.16 | ||
| Mn | 0.8 | 1.1 | ||
| P | 0.04 | |||
| S | 0.1 | 0.15 | ||
| Si | 0.1 | 0.4 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| bars, steel bars, wire, normalized or hot rolled | 250 | 370 470.00 | 27 | |||
| bars, steel bars, wire, quenched and tempered | 550 | 750 1150.00 | 8 | 40 | ||
| bars, HB, wire | 钢棒 143.00 |
Heat treatment
| Type | 1 |
|---|---|
| Heat-treatment curve | Hardness-Tempering |