Standard Heat Treatments
 |
Anneal: Heat to 1900 - 2050 F and water
quench
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Harden: Types 303 and 303 Se cannot
be hardened by heat treatment |
Corrosion Resistance
|
Excellent corrosion resistance
|
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Effectively resist attack in atmospheric
exposures, sterilizing solutions, most organic and many
inorganic chemicals, most dyes nitric acid and foods
|
|
For best corrosion resistance finished
parts should be free from scale and foreign particles
|
Forgeability
|
Types 303 and 303Se should be heated
slowly to 2000-2150 F
|
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Soaked for a sufficient time then raised
to 2200 - 3250 F
|
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They should not be forged below 1700
F |
|
Machinability
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Excellent machinability
|
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Surface finish on parts made of 303
Se is better than that of regular 303 |
Formability
|
Type 303 limited formability because
of its sulfur content
|
|
Type 303 Se has better formability
but it should be limited to mild forming operations
|
Weldability
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only fair weldability
|
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can be welded using proper procedures
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Weldability can be improved by using
methods that minimize dilution of the weld metal with
the melted base metal
|
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Reducing the time that weld are in
the hot-short temperature range and use of Type 312
(29-9) filler metal helps obtain satisfactory results
|
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