1.4748
Stainless Steel1.4748
DIN stainless steel grade 1.4748 (X-series corrosion-resistant).
Chemical Composition (%)
| C | 0.03 |
|---|---|
| SI | 1 |
| MN | 2 |
| CR | 21 |
| NI | 4.5 |
| MO | 2.5 |
| N | 0.1 |
| P | 0.03 |
| S | 0.02 |
Mechanical Properties
Tensile:≥520 MPa;Yield:≥210 MPa;Elongation:≥40%
Equivalent Standards
EN equivalent
Equivalent Grades
DIN 1.4748
Applications
Corrosion-resistant parts, flanges, fasteners
Available Forms
Sheet,Bar,Plate
Uses
Duplex stainless steel with a mixed austenite/ferrite structure giving roughly twice the yield strength of austenitic grades plus excellent chloride resistance. Used in desalination, offshore, pulp & paper, heat exchangers and chemical tankage.
Heat Treatment
Solution anneal 1020–1100 °C and rapid quench; reheating near 300–400 °C (sigma phase) and 475 °C embrittlement zones must be avoided.
Precautions
Heat input and interpass must be controlled to keep the ferrite/austenite balance; avoid exposure 300–400 °C (sigma) and use low carbon. Sensitive to chloride SCC above ≈60 °C.
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