STAINLESS STEEL
ALLOYS
Stainless steel alloys are a family of iron-based alloys that contain a minimum of 10.5% chromium by weight. The addition of chromium creates a protective oxide layer on the surface of the alloy, which imparts its corrosion resistance properties. In addition to chromium, stainless steel alloys may also contain other elements such as nickel, molybdenum, titanium, copper, and others to enhance specific properties.
We offer a range of stainless steels (iron-based alloys) which have the:
- a resistance to corrosion superior to that of the more common austenitic grades
- superior resistance to high-temperature corrosion
- or a combination of corrosion resistance and strength
Product | Major Applications | Availability |
*253MA Heat and/or creep resistant Grade: UNS S30815 Composition: 21Cr-11Ni-67Fe-N-SI-Ce | A grade very similar to 309 stainless steel but with alloying element additions that enhance the metals creep strength and resistance to oxidation particularly in cyclical conditions. | Small bore pipe from stock; balance imported;ex-stock or mill availability |
17-4PH Corrosion resistant Other Grade: S17400 W Nr. 1.4542 Composition: 78Fe-17Cr-4Ni-4Cu-Cb | 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 |
254SMO Corrosion resistant Grade: UNS S31254 W Nr. 1.4547 Composition: 55Fe-20Cr-18Ni-6.1Mo-0.5Cu-N | 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 |
316Ti Corrosion resistant Heat and/or creep resistant Grade: UNS S31635 W Nr. 1.4571 Composition: 69Fe-17Cr-12Ni-2Mo-Ti | 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 |
321 Corrosion resistant Heat and/or creep resistant Grade: UNS S32100 W Nr. 1.4541 Composition: 72Fe-18Cr-10Ni-Ti | 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 |
431 Corrosion resistant Other Grade: UNS S43100 W Nr. 1.4057 Composition: 80Fe-16Cr-2Ni-C | 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 |
ALLOY 20 Corrosion resistant Grade: UNS N08020 W Nr. 2.4660 Composition: 40Fe-20Cr-33Ni-2.5Mo-4Cu-Cb | Often used in sulphuric and phosphoric acids. | Imported; ex-stock or mill availability |
ALLOY 330 Heat and/or creep resistant Grade: UNS N08330 W Nr. 1.4864 Composition: 43Fe-19Cr-35Ni-1.25Si Download: Alloy Alloy 330 Datasheet | Good scaling resistance in air and combustion gases. Useful for a wide range of furnace parts at temperatures up to 1100°C. | Imported; ex-stock or mill availability |
ALLOY 446 Heat and/or creep resistant Grade: UNS S44600 Composition: 25Cr-75Fe-N Download: Alloy 446 Datasheet | A ferritic stainless steel used as a general purpose heat resisting grade in a wide range of applications. 1.4762 is a similar grade but contains a small amount of Aluminium. Small bore pipe stock is Sandvick 4C54. | Small bore pipe from stock; Balance imported; ex-stock or mil availability |
ALLOY 904-6% Mo Corrosion resistant Grade: UNS N08925 W Nr. 1.4529 Composition: 47.5Fe-20Cr-25Ni-6Mo-1.5Cu Download: Alloy 904-6% Mo Datasheet | 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 |
ALLOY 904L Corrosion resistant Other Grade: UNS N08904 W Nr. 1.4539 Composition: 49Fe-20Cr-25Ni-4.5Mo-1.5Cu Download: Alloy 904L Datasheet | An austenitic stainless steel having good resistance to general corrosion, pitting and crevice corrosion in acidic enevironments. Used in seawater, pulp and paper industry, and pollution control systems. | Comprehensive range of plate, bar & pipe from local stock; also imports from stock & mill production. |
GRADE 1.4313 Corrosion resistant Other Grade: 1.4313 Composition: 13Cr-4Ni-0.55Mo-82Fe | A low carbon martensitic stainless steel with very good strength and toughness. In the quenched and tempered condition the material may be used up to 300 deg C. Applications range from the petro-chemical industry to pump and compressor parts and turbines for power generations. | Imported; ex-stock or mill availability |
GRADE 309 Heat and/or creep resistant Grade: UNS S30900 W Nr. 1.4828 Composition: 64Fe-23Cr-13Ni | 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 |
GRADE 310 Heat and/or creep resistant Grade: UNS S31000 W Nr. 1.4841 Composition: 55Fe-25Cr-20Ni Download: Grade 310 Datasheet | 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 |