Grade 303 / UNS S30300 Stainless Steel Round Bar Polished Stainless
|Product name||303 stainless steelround bar|
|Payment terms||30% TT inadvance and 70% TT balance against copy of B/L|
|Packing||Standard Seaworthy Package|
|MTC||every materials has it's own MTC|
|Delivery time||7-15 dyas,or according to the order quantity or upon negotiation|
|Place of origin||Shanghai, China(mainland)|
More informations about our stainless steel bar
|Product Name||Stainless Steel Round Bar|
|Grade||Mainly in grade 201 301 303 309S 310S 316L 317L 321 410 420
440A/B/C 2205 2507 904L 17-4ph 17-7ph 15-5ph|
|Standard||ASTM JIS DIN|
|Diameter||10 - 310mm|
|Length||2000mm~6500mm or cut to any length as your request|
|Surface||black / polished|
Packing Detail information
Export standard package,bundled or be required.
The inner size of container is below:
20ft GP: 5.8m(length) x 2.13m(width) x 2.18m(high)
40ft GP: 11.8m(length) x 2.13m(width) x 2.18m(high)
40ft HG: 11.8m(length) x 2.13m(width) x 2.72m(high)
|Delivery Details||7-15 dyas,or according to the order quantity or upon negotiation|
|Loading||25 Tons full 20ft and 40ft container|
Grade 303 represents the optimum in machinability among the
austenitic stainless steels. It is primarily used when production
involves extensive machining in automatic screw machines.
Machinability Rating (compared to B1212) is approximately 78%.
303 is also available as a "Ugima" Improved Machinability grade,
with machinability even higher than that of the standard 303.
The sulphur addition which is responsible for the improved
machining and galling characteristics of Grade 303 lowers its
corrosion resistance to below that of Grade 304. As for other
austenitic grades the structure gives 303 excellent toughness,
although the sulphur in 303 reduces its toughness slightly.
These properties are specified for long product (bar) in ASTM A582.
Similar but not necessarily identical properties are specified for
other products such as wire and forgings in their respective
specifications. Grade 303 is not produced in flat rolled products.
Typical compositional ranges for grade 303 stainless steels are
given in table 1.
Table 1. Composition ranges for 303 grade stainless steel
- Comprehensive Market Research Report on US Steel Industry
- Stainless Steels - Stainless 303 Properties, Fabrication and
- Nickel Alloys – Stainless Steels, Nickel Copper Alloys, Nickel
Chromium Alloys, Low Expansion Alloys and Magnetic Alloys
Good resistance to mildly corrosive atmospheres, but significantly
less than Grade 304 due to the sulphur addition; the sulphide
inclusions act as pit initiation sites. Grade 303 should not be
exposed to marine or other similar environments, as these will
result in rapid pitting corrosion. Because the sulphide inclusions
in 303 are primarily aligned along the rolling direction the
corrosion resistance is particularly reduced in cross-sections.
Grade 303, like other common austenitic stainless steels, is
subject to stress corrosion cracking in chloride containing
environments above about 60°C.
Good oxidation resistance in intermittent service to 760°C and in
continuous service to 870°C. Continuous use in 425-860°C range not
usually recommended due to carbide precipitation - 303 usually does
not have a low carbon content so is susceptible to sensitisation.
Solution Treatment (Annealing) - Heat to 1010-1120°C and cool
rapidly. This grade cannot be hardened by thermal treatment.
A "Ugima" improved machinability version of grade 303 is available
in round bar products. This machines significantly better even than
standard 303, giving very high machining rates and lower tool wear
in many operations.
Typical applications include:
• Nuts and Bolts
• Aircraft Fittings
• Electrical Switchgear Components
• In general any component that is heavily machined and where the
corrosion resistance and fabrication properties of 303 are viable.