303 Stainless Steel Bar

Machinable stainless steel.


303 finds use in applications where heavy machining of parts is a requirement.

Type 303 stainless steel bar is highly machinable and ideal for components requiring heavy machining.


303 austenitic stainless steel offers superior machinability. The machinability of the alloy is the best of all austenitic stainless steel grades. The high machinability rating of 303 stainless steel is achieved due to the introduction of sulphur in the alloying process, although this improvement comes at a cost. Although toughness characteristics remainexcellent, corrosion resistance, formability, and toughness are slightly reduced.


Commercial Applications

Type 303 finds use in applications where heavy machining is a requirement, and examples include aerospace fittings, valve bodies, fasteners and shafts. The weldability of the alloy is generally poor. The alloy has lower corrosion resistance when compared to 1.4301. 303 is non-magnetic and is not hardenable by heat treatment.



303 Stainless Steel Bar Datasheet

Stock Availability

Smiths Advanced Metals stocks 303 stainless steel rods in the solution annealed condition and various sizes to suit your engineering applications. We also process your stainless steel bars in-house to exact lengths.



Product Features:


    1.4305
    AISI 303
    AMS5640
    AMSQQS764
    ASTM A484
    ASTM A582
    UNS S30300

    Valve bodies
    Fasteners
    Aerospace fittings
    Shafts

    Good mechanical properties
    Excellent machinability
    Very good toughness
    Ideal for heavily machined parts

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