Similar to X8CrNi25-21 (AISI 310S), it is differentiated only due to some analytical differences that further improve its resistance to high temperature.
Standard Reference: EN 10095: 1999
| EUROPE | ITALY | GERMANY | FRANCE | UK | USA | ||
|---|---|---|---|---|---|---|---|
| EN 10095: 1999 |
(UNI 6900:71) |
- | (NF A 35-578-91) | (BS 1501 pt. 3-80) | AISI | ||
| Grade | N° | Werkstoff | N° | ||||
| X15CrNiSi25-21 | 1.4841 | X16CrNiSi2520 | - | - | Z15CNS25-20 | - | AISI 314 |
| C / max | Si | Mn / max | P / max | S / max | N/ max | Cr | Ni |
|---|---|---|---|---|---|---|---|
| 0,20 | 1,50÷2,50 | 2,00 | 0,045 | 0,015 | 0,11 | 24,0÷26,0 | 19,0÷22,0 |
| Size (mm) | Hardness HB max* ** | Rp 0,2 (MPa) min | Rp 1 (MPa) min* | Rm (MPa)** | A5 (%) min** |
|---|---|---|---|---|---|
| 100 | 223 | 230 | 270 | 550÷750 | 30 |
| * Only for guidance. ** The maximum HB values may be raised by 100HB or the tensile strenght value may be raised by 200 MPa and the minimum A% value may be lowered to 20% for bars of ≤35 mm. |
|||||
| 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 |
| *For reference only. 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 |
| *For reference only. Note: If skin passed, Rm might be increased by up to 50 MPa. |
||
| Operation | °C |
|---|---|
| Hot forgings deformation | 950÷1200 |
| Solution annealing (water, air) | 1050÷1150 |
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