| GRADE | MAJOR APPLICATIONS | AVAILABILITY | COMPOSITION |
| 17-4PH
UNS S17400
W Nr. 1.4542
| A precipitation (age hardenable) stainless steel offering high strength and hardness, good corrosion resistance and fabricating characteristics. | Selected items from local stock; balance imported; ex-stock or mill availability | 78Fe-17Cr-4Ni-4Cu-Cb |
| 254SMO
UNS S31254
W Nr. 1.4547
| A high alloy austenitic stainless steel having greater resistance to pitting and crevice corrosion than ALLOY 904L. Thus a useful alloy for more demanding seawater, desalination, bleach plant and chemical plant applications. Also flue gas cleaning. | Selected items from local stock; balance imported; ex-stock or mill availability | 55Fe-20Cr-18Ni-6.1Mo-0.5Cu-N |
| 316Ti
UNS S31635
W Nr. 1.4571
| A stabilized grade of stainless steel having similar corrosion properties to 316/316L but with enhanced resistance to intergranular corrosion and elevated temperature mechanical properties. | Imported; ex-stock or mill availability | 69Fe-17Cr-12Ni-2Mo-Ti |
| 321
UNS S32100
W Nr. 1.4541
| A stabilized grade of stainless steel having similar corrosion properties to 304/304L but with enhanced resistance to intergranular corrosion and elevated temperature mechanical properties. | Selected items from local stock; balance imported; ex-stock or mill availability | 72Fe-18Cr-10Ni-Ti |
| 431
UNS S43100
W Nr. 1.4057
| A heat treatable stainless steel with useful corrosion resistance and mechanical properties (strength and toughness). Used for pump and valve components and fasteners. | Selected items from local stock; balance imported; ex-stock or mill availability | 80Fe-16Cr-2Ni-C |
| ALLOY 20
UNS N08020
W Nr. 2.4660
| Often used in sulphuric and phosphoric acids. | Imported; ex-stock or mill availability | 40Fe-20Cr-33Ni-2.5Mo-4Cu-Cb |
| ALLOY 2205
UNS S31803
W Nr. 1.4462
| A duplex stainless steel with excellent resistance to stress corrosion cracking. It displays a high yield strength as well as a useful resistance to pitting. | Selected items from local stock; balance imported; ex-stock or mill availability | 69Fe-22Cr-5.7Ni-3Mo-N |
| ALLOY 255
UNS S32550
W Nr. 1.4507
| Copper containing austenitic-ferritic stainless steel. ALLOY 255 has the added benefit over ALLOY 2205 of being resistant to sulphuric and phosphoric acids over a range of conditions. | Imported; ex-stock or mill availability | 64Fe-25Cr-5.7Ni-3.3Mo-2Cu-N |
| ALLOY 330
UNS N08330
W Nr. 1.4864
| Good scaling resistance in air and combustion gases. Useful for a wide range of furnace parts at temperatures up to 1100oC. | Imported; ex-stock or mill availability | 43Fe-19Cr-35Ni-1.25Si |
| ALLOY 904-6% Mo
UNS N08925
W Nr. 1.4529
| The higher molybdenum content than ALLOY 904L gives increased resistance to pitting and crevice corrosion in acidic environments. Used in seawater, pulp and paper industry, and pollution control systems. | Imported; ex-stock or mill availability | 47.5Fe-20Cr-25Ni-6Mo-1.5Cu |
| ALLOY 904L
UNS N08904
W Nr. 1.4539
| An austenitic stainless steel having good resistance to general corrosion, pitting and crevice corrosion in acidic environments. Used in seawater, pulp and paper industry, and pollution control systems. | Comprehensive range of plate, bar and pipe from local stock; also imports from stock & mill production. | 49Fe-20Cr-25Ni-4.5Mo-1.5Cu |
| ALLOY S32760
UNS S32760
W Nr. 1.4501
| A highly alloyed duplex stainless steel for use in seawater, brine and similar chloride containing environments. Corrosion and strength properties superior to those of ALLOY 2205. | Imported; ex-stock or mill availability | 64Fe-25Cr-7Ni-3.5Mo-0.75Cu-0.75W-N |
| GRADE 309
UNS S30900
W Nr. 1.4828
| Another stainless steel for use at high temperatures but with lower nickel than GRADE 310 enabling the alloy to be more resistant to sulphidation. | Imported; ex-stock or mill availability | 64Fe-23Cr-13Ni |
| GRADE 310
UNS S31000
W Nr. 1.4841
| A high temperature stainless steel having useful strength and oxidation resistance. GRADE 310S is a controlled carbon variant while GRADE 314 has a higher silicon content and hence slightly better oxidation resistance. | Selected items from local stock; balance imported; ex-stock or mill availability | 55Fe-25Cr-20Ni |
| LDX2101
UNS S32101
W Nr. 1.4162
| A low-alloyed general purpose duplex grade displaying high strength and corrosion resistance on a par with most standard grades of stainless steel. | Imported; ex-stock or mill availability | 72Fe-21.5Cr-5Mn-1.5Ni-0.3Mo-N |
| SAF 2507
UNS S32750
W Nr. 1.4410
| As duplex stainless steel this alloy displays similar properties to ALLOY 2205. Strength is however greater as is resistance to pitting and crevice corrosion and resistance to stress corrosion and cracking. | Imported; ex-stock or mill availability | 66Fe-24Cr-6Ni-3Mo-N |
