Steel with characteristics similar to X6CrNiTi18-10 (AISI 321), in which niobium is the stabilizing element to improve resistance to intercrystalline corrosion.
Standard Reference: EN 10088-3: 2014 (Hot-rolled and bright products)
| EUROPE | ITALY | GERMANY | FRANCE | UK | USA | ||
|---|---|---|---|---|---|---|---|
| EN 10088-3: 2005 |
(UNI 6900:71) |
(DIN 17440 - 85) | (NF A 35-573-90) | (BS 970 pt.3 -91) | AISI | ||
| Grade | N° | Werkstoff | N° | ||||
| X6CrNiNb18-10 | 1.4550 | X 6 CrNiNb 18 11 | X6CrNiNb18-10 | 1.4550 | Z6CNNb18-10 | 347S31 | AISI 347 |
| C / max | Si / max | Mn / max | P / max | S / max | Cr | Nb | Ni |
|---|---|---|---|---|---|---|---|
| 0,08 | 1,00 | 2,00 | 0,045 | 0,015 | 17,0÷19,0 | 10x%C÷1,00 | 9,0÷12,0 |
| Size (mm) |
Hardness HB max* ** | Rp 0,2 (MPa) min | Rp 1 (MPa) min* | Rm (MPa)** | A5 (%) min** | KV (J) min | Resistance to intergranular corrosion | |
|---|---|---|---|---|---|---|---|---|
| in the delivery condition | in the welded condition | |||||||
| d≤100 | 230 | 205 | 240 | 510÷740 | 40 | 100 | YES | YES |
| * 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. |
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| Operation | °C |
|---|---|
| Hot forgings deformation | 900÷1150 |
| Solution annealing (water, air) | 1020÷1120 |
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