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303 Stainless Steel Round Bar Bright Rod Free Cutting SUS303 Stainless Steel Bar

Categories Stainless Steel Round Bar
Brand Name: TISCO BAO STEEL
Model Number: 303
Certification: ISO,BV,SGS
Place of Origin: China
MOQ: 300KGS
Price: 3.45 USD/KG
Payment Terms: L/C, T/T
Supply Ability: 50000KGS
Delivery Time: 14 DAYS
Packaging Details: Export Packing
Type: Round
Application: Construction,decoration,Industry,Mechineal
Standard: DIN,ASTM,AISI
Grade: 300 Series
Shape: Round
Special use: Free Cutting Steel
Dimensions: 5.5mm-500mm
Surface: bright,Polished
Product name: SS 303 Stainless Steel Round Bar
Technique: Polished
Length: Customers' Requirements
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    303 Stainless Steel Round Bar Bright Rod Free Cutting SUS303 Stainless Steel Bar

    303 Stainless Steel Round Bar Bright Rod Free Cutting SUS303 Stainless Steel Bar

    General Properties

    Alloy 303 is a non-magnetic, austenitic stainless steel that is not hardenable by heat treatment. It is the free machining modification of the basic 18% chromium / 8% nickel stainless steel. Alloy 303 was specially designed to exhibit improved machinability while maintaining good mechanical and corrosion resistant properties Due to the presence of sulfur in the steel composition, Alloy 303 is the most readily machineable austenitic stainless steel; however, the sulfur addition does lower Alloy 303’s corrosion resistance to below that of Alloy 304. Like other austenitic grades, Alloy 303 demonstrates excellent toughness, although the sulfur does reduce this a little as well.

    Applications

    Alloy 303 is frequently used in applications that require parts to be heavily machined. Some examples include:

    • Nuts and bolts
    • Aircraft fittings
    • Gears
    • Screws
    • Shafts
    • Electrical switchgear components
    • Bushings

    Standards – Alloy 303

    ASTM/ASME ……………. UNS S30300

    EURONORM ……………. FeMi35Cr20Cu4Mo2

    DIN ………………………… 2.4660

    Corrosion Resistance

    • Good resistance to mildly corrosive atmospheres, but significantly less than Alloy 304
    • When additional sulfur is added to improve machinability, it can often slightly reduce corrosion resistance
    • In most dry and mild corrosive environments, Alloy 303 is comparable to other unmodified alloys
    • Should not be exposed to moist, marine environments as it is subject to rapid-pitting corrosion and a rust film will tend to form
    • Like other common austenitic stainless steels, it is subject to corrosion cracking in chloride environments above 60oC

    Heat Resistance

    • Good oxidation resistance at temperatures up to 1700oF (927 oC)
    • Continuous use at temperatures above 1400oF (760oC) is not usually recommended due to carbide precipitation which can lead to irregular scaling
    • Does not have a low carbon content so it is also vulnerable to sensitisation

    Welding Characteristics

    • Not generally recommended, but may be welded with some difficulty
    • May be welded with Alloy 310 electrodes
    • Should be annealed after welding to re-dissolve precipitated carbides

    Machinability

    • High machining rates can be obtained in the annealed condition with hardness in the range of 200 to 240 Brinell
    • Will work harden, therefore, it should be machined at reduced surface feet per minute and heavier feeds to prevent glazing at the tool interface.

    Chemical Properties:

    %CrNiCSiMnPSMoFe
    303min: 17.0
    max:19.0
    min: 8.0
    max: 10.0
    0.15
    max
    1.00
    max
    2.0
    max
    0.20
    max
    0.15
    min
    0.75balance

    Mechanical Properties:

    GradeTensile Strength
    ksi (min.)
    Yield Strength 0.2%
    Offset ksi (min.)
    Elongation -
    % in
    50 mm (min.)
    Hardness
    (Brinell) MAX
    Hardness
    (Rockwell B) MAX
    303753035228

    Physical Properties:

    Denstiy
    lbm/in3
    Coefficient of
    Thermal Expansion (min/in)-°F
    Electrical Resistivity mW-inThermal Conductivity BTU/hr-ft-°FMelting
    Range
    at 68 °Fat 68 – 212°Fat 68 – 932°Fat 68 – 1450°Fat 68°Fat 212°Fat 392°Fat 752°Fat 1112°Fat 1472°Fat 68 – 212°F
    0.299.210.410.928.330.733.839.443.747.6113.22552°F


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