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Okey
It is similar to the previous one, but the addition of sulfur improves its machinability, making it however less resistant to corrosion. Used for machining with chip removal, it is the low carbon version of the American 430F type. It is also used because of its low magnetic hysteresis characteristics.
| EUROPE | ITALY | GERMANY | FRANCE | UK | USA | ||
|---|---|---|---|---|---|---|---|
| EN 10088-3: 2005 |
(UNI 6900:71) |
(DIN 17440 - 85) |
(NF A 35-574-90) |
(BS 970 pt. 3 -91) |
AISI | ||
| Grade | N° | Werkstoff | N° | ||||
| X6CrMoS17 | 1.4105 | X10CrS17 | X6CrMoS17 | 1.4105 | Z8CF17 | - | 430F |
| C / max | Si / max | Mn / max | P / max | S | Cr | Mo |
|---|---|---|---|---|---|---|
| 0,08 | 1,50 | 1,50 | 0,040 | 0,15÷0,35 | 16,0÷18,0 | 0,20÷0,60 |
| Size (mm) | Hardness HB max* | Rp 0,2 (MPa) min | Rm (MPa) | A5 (%) min | Resistance to intergranular corrosion | |
|---|---|---|---|---|---|---|
| in the delivery condition | in the welded condition | |||||
| d≤100 | 200 | 250 | 430÷630 | 20 | NO | NO |
* Only for guidance
| Size (mm) | Rp 0,2 (MPa) min | Rm (MPa) max | A5 (%) min* |
|---|---|---|---|
| d≤10 | 330 | 530÷780 | 7 |
| 10<d≤16 | 310 | 500÷780 | 7 |
| 16<d≤40 | 250 | 430÷730 | 12 |
| 40<d≤63 | 250 | 430÷730 | 12 |
| 63<d≤100 | 250 | 430÷630 | 20 |
* Values valid only for size ≥5 mm
| Tensile strength levels | Rm (MPa) |
|---|---|
| +C 500 | 500÷700 |
| +C 650 | 650÷850 |
| +C 800 | 800÷1000 |
| +C 900 | 900÷1100 |
Note: the desired tensile strength level shall be evaluated depending on diameter required
| Size | A (%) max | Rm (MPa) max |
|---|---|---|
| 0,10≤d≤0,20 | 10 | 900 |
| 0,20≤d≤0,50 | 15 | 850 |
| 0,50≤d≤1,00 | 15 | 850 |
| 1,00≤d≤3,00 | 15 | 800 |
| 3,00≤d≤5,00 | 15 | 750 |
| 5,00≤d≤16,00 | 20 | 700 |
Note: If skin passed, Rm might be increased by up to 50 MPa
| Operation | °C |
|---|---|
| Hot forgings deformation | 800÷1100 |
| Annealing (air) | 750÷850 |
