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 © 2008
Disclaimer
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303 1.4305
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303 is a sulphur bearing austenitic free machining stainless. 303 stainless offers excellent corrosion resistance with improved machineability to the more popular 304 stainless grade. As with other austenitic stainless steel grades 303 stainless offer excellent toughness though the higher sulphur content reduces the toughness slightly in 303 stainless. 303 stainless will give good oxidation resistance in occasional service up to 750ºC and in continuous service up to 870ºC (but this is not recommended for 303 grade stainless) The higher sulphure content of 303 stainless steel gives the grade poor weldability and reduced formability compared with other austenitic stainless specifications.
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Typical Analysis
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303
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C.
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Mn.
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P.
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S.
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Si.
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Cr.
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Ni.
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0.15%
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2.00%
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0.05%
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0.15%
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1.00%
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17.00-
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8.00-
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max.
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max.
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max.
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min.
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max.
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19.00%
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10.00%
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| Physical Properties 303 |
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Temperature |
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20ºC
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200ºC
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400ºC
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800ºC
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| Modulus of elasticity |
20000
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18500
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17000
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13500
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| kg/mm |
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| Specific heat |
0.105
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0.125
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0.135
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0.15
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| kcal/ºC |
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| Specific electrical resistance |
0.7
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0.8
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1.0
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1.15
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| (resistivity) |
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Mean value for: |
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20-100ºC
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20-200ºC
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20-400ºC
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20-800ºC
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| Coefficient of Thermal Expansion |
17
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17.5
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18
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19.5
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| x10-6 per ºC |
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| Density g/cm3 at 20ºC |
7.9
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| Scaling temperature ºC |
875ºC
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sales@westyorkssteel.com
 
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