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Chromium-nickel austenitic stainless steel. The rather high carbon content allows high values of mechanical resistance to be achieved through extrusion hardening. Used for springs, antennas, and high resistance pieces.
| 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° | ||||
| X10CrNi18-8 | 1.4310 | X2CrNi1707 | - | - | Z11CN18-08 | 302S31 | 302 |
| C | Si / max | Mn / max | P / max | S / max | N/ max | Cr | Mo / max | Ni |
|---|---|---|---|---|---|---|---|---|
| 0,05÷0,15 | 2,00 | 2,00 | 0,045 | 0,015 | 0,10 | 16,0÷19,0 | 0,80 | 6,0÷9,5 |
| Tensile strength levels | Rm (MPa) |
|---|---|
| +C 600 | 600÷800 |
| +C 700 | 700÷900 |
| +C 800 | 800÷1000 |
| +C 900 | 900÷1100 |
| +C 1000 | 1000÷1250 |
| +C 1100 | 1100÷1350 |
| +C 1200 | 1200÷1450 |
| +C 1400 | 1400÷1700 |
| +C 1600 | 1600÷1900 |
| +C 1800 | 1800÷2100 |
Note: the desired tensile strength level shall be evaluated depending on diameter required
| Size | A (%) max | Rm (MPa) max |
|---|---|---|
| 0,10≤d≤0,20 | 20 | 1050 |
| 0,20≤d≤0,50 | 30 | 1000 |
| 0,50≤d≤1,00 | 30 | 950 |
| 1,00≤d≤3,00 | 30 | 900 |
| 3,00≤d≤5,00 | 35 | 850 |
| 5,00≤d≤16,00 | 35 | 800 |
Note: If skin passed, Rm might be increased by up to 50 MPa
| Size (mm) |
As Treated (+AT) or Peeled (+AT+PE) | Cold Drawn (+AT +C) | Cold Drawn + Solution annealed (+AT +C +AT) | Cold Drawn + Solution annealed + Skin passed (+AT +C +AT +LC) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Rm (MPa) max | Z (%) min | Rm (MPa) max | Z (%) min | Rm (MPa) max | Z (%) min | Rm (MPa) max | Z (%) min | ||||
| 2≤d≤5 | - | - | - | - | 720 | 65 | 760 | 60 | |||
| 5<d≤10 | 660 | 65 | 890 | - | 680 | 65 | 730 | 60 | |||
| 10<d≤25 | 660 | 65 | 850 | - | 680 | 65 | - | - | |||
| 25<d≤50 | 660 | 65 | - | - | - | - | - | - | |||
| Operation | °C |
|---|---|
| Hot forgings deformation | 900÷1200 |
| Solution annealing (water, air) | 1020÷1100 |