By using 1.4305 (AISI 303 – SS2346) you get corrosion resistant free-machining stainless steel excellent for machining. It has good corrosion resistance and is often used for details within construction, building and processindustry.
The steel grade 1.4305 (also called AISI 303 and SS2346) is a free-machining austenitic stainless steel with excellent machinability. It is suitable for massproduction of details requireing good resistance to atmospheric corrosion and good resistance to many organic and inorganic chemicals. It shall not be used in marine environment or coastal environments. It is non-magnetic but may become slightly magnetic after cold working and welding.


International Equivalent
| Mark | Analogue | W. Nr. | Aisi Uns | En | Order |
|---|---|---|---|---|---|
| 1.4305 | 303 | X8CrNiS18-9 | Delivery from the stock, in stock |
Technical characteristics
Stainless heat resisting chromium-Nickel steel of austenitic class. The basis of the alloy is iron, its content in the alloy is about 68%. The composition additionally alloyed with manganese, silicon, selenium,.Used for the manufacture of pipes and pipe fittings, high strength parts and structures, welded by spot welding. Weldability without restrictions.
Percentage composition EN 10095−1999
| Fe | C | Si | Mn | Ni | Cr | Se | S | P | Impurities |
|---|---|---|---|---|---|---|---|---|---|
| basis | ≤ 0,12 | ≤0,8 | ≤ 2 | 9 — 11 | 17 — 19 | 0,18 — 0,35 | ≤ 0.02 | ≤0.035 | ≤ 0,2 |
Heat treatment: quenching of 1050 — 1080 °C, air cooling. Limit short-term strength of 750 MPa. The limit of proportionality (yield strength for permanent deformation) of 35 MPa.
1.4305 - AISI 304 is popularly know as grade 303 stainless steel. Grade 303 is the most readily machineable of all the austenitic grades of stainless steel. The machineable nature of grade 303 is due to the present of Sulphur in the steel composition. Whilst the Sulphur improves machining, it also cause a decrease in the corrosion resistance and a slight lowering of the toughness. The corrosion resistance is lower than that for 304. The toughness is still excellent as with other austenitic grades.
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