CLASSIFICATION OF CORROSION-RESISTANT STEELS ACCORDING TO DIFFERENT CRITERIA:
SERVICE PROPERTIES
- stainless
- heat-resistant
- creep-resistant
CHEMICAL COMPOSITION
– Ni up to and above 2.5%
– Mo addition
– Additions of Ti, Nb, Cu
- Fe + Cr
- Fe + Cr-Ni
- Fe + Cr-Ni-Mo
- Fe + Cr-Mn-Ni
CRYSTAL STRUCTURE
- austenitic
- ferritic
- austenitic-ferritic (duplex)
- martensitic
- precipitation-hardened
EXAMPLES OF APPLICATIONS FOR CORROSION-RESISTANT STEELS
- consumer and medical goods
- chemical and energy industries
- automotive and transport sectors
- general industry
- architecture, construction, structures
- art
STEEL GRADES
| Austenitic |
| 1.4301, 1.4307 |
| 1.4541 |
| 1.4401, 1.4404 |
| Ferritic |
| 1.4006 |
| 1.4016 |
| 1.4510 |
| Austenitic-ferritic (duplex) |
| 1.4462 |
| Martensitic |
| 1.4006, 1.4021, 1.4082 |
Nomenclature – stainless and acid-resistant steels:
Since Poland’s accession to the European Union, European standards have been in force, specifically the PN-EN 10088 series, which defines corrosion-resistant steels as well as basic forms of flat and long products made from these steels. According to this standard, the group of corrosion-resistant steels includes stainless, heat-resistant and creep-resistant steels, while the term “acid-resistant steel” is no longer used. The group of stainless steels now includes both the former stainless and acid-resistant steels (as classified under the old Polish standard PN-71/H-86020), except for heat-resistant and creep-resistant grades. All of them — stainless, heat-resistant, and creep-resistant — are considered corrosion-resistant steels.
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