Steel similar to X12Cr13 (AISI 410); the addition of sulfur improves machinability by chip removal, but reduces resistance to corrosion, which in any case is improved with the material at the quenched and tempered state.
Standard Reference: EN 10088-3: 2014 (Hot-rolled and bright products)
| EUROPE | ITALY | GERMANY | FRANCE | UK | USA | ||
|---|---|---|---|---|---|---|---|
|
EN 10088-3: 2005 |
(UNI 6900: 71) |
|
|
(BS 970 pt. 3 -91) |
AISI | ||
| Grade | N° | Werkstoff | N° | (NF A 35-574-90) | |||
| X12CrS13 | 1.4005 | X12CrS13 | - | - | Z11CF13 | 416S21 | 416 |
| C | Si / max | Mn / max | P / max | S /max | Cr | Mo / max |
|---|---|---|---|---|---|---|
| 0,06÷0,15 | 1,00 | 1,50 | 0,040 | 0,15÷0,35 | 12,0÷14,0 | 0,60 |
| Size (mm) | Heat treatment | Hardness HB max* | Rp 0,2 (MPa) min | Rm (MPa) | A5 (%) min |
|---|---|---|---|---|---|
| d≤100 | Annealed (+A) | 220 | - | 730 max | - |
| Quenched + Tempered (+QT 650) | - | 450 | 650÷850 | 12 | |
| * Only for guidance. | |||||
| Size (mm) | Annealed | Quenched + Tempered | ||||
|---|---|---|---|---|---|---|
| Rm (MPa) max | HB max* | Heat treatment | Rp 0,2 (MPa) min | Rm (MPa) max | A5 (%) min** | |
| d≤10 | 880 | 280 | Quenched + Tempered (+QT 650) |
550 | 700÷1000 | 8 |
| 10<d≤16 | 880 | 280 | 500 | 700÷1000 | 8 | |
| 16<d≤40 | 800 | 250 | 450 | 650÷930 | 10 | |
| 40<d≤63 | 760 | 230 | 450 | 650÷880 | 10 | |
| 63<d≤100 | 730 | 220 | 450 | 650÷850 | 12 | |
| * For reference only. ** Values valid only for size ≥5 mm. |
||||||
| Operation | °C |
|---|---|
| Hot forgings deformation | 900÷1100 |
| Annealing (air) | 745÷825 |
| Quenching in air or oil | 950÷1000 |
| Tempering (QT 650) | 680÷780 |
