303 exists for one reason: to be machined fast. The sulphur addition forms manganese sulphide inclusions that break the chip, roughly doubling achievable cutting speeds over 304. Those same inclusions are corrosion initiation sites, so 303 trades corrosion resistance for productivity and should never be substituted into a corrosion-critical position.
Pitting resistance equivalent. Higher resists chlorides better.
Indexed to 304. Indicative, for specification triage.
Rajgranth Metal & Alloys manufactures, stocks, supplies and exports Stainless Steel 303 coils (UNS S30300) from Mumbai. 304 with sulphur added for machinability. The free-machining austenitic. Rajgranth Metal & Alloys has been trading since 1980, is self-funded and debt-free, and despatches most orders from its Mumbai stockyard within two days.
303 exists for one reason: to be machined fast. The sulphur addition forms manganese sulphide inclusions that break the chip, roughly doubling achievable cutting speeds over 304. Those same inclusions are corrosion initiation sites, so 303 trades corrosion resistance for productivity and should never be substituted into a corrosion-critical position.
Stainless Steel 303 is also designated UNS S30300, EN 1.4305, AISI 303, JIS SUS303, GB S30317 and Werkstoff X10CrNiS18-9. Quote the designation your specification uses and we will supply to it.
Roughly double the machining rate of 304, Excellent surface finish on turned parts and Ideal for high-volume automatic lathe work. It is non-magnetic, with requires-procedure weldability and excellent machinability, and is used in continuous service in air up to about 760 °C.
Noticeably lower corrosion resistance than 304, Welding is not recommended — sulphur causes hot cracking, Not suitable for marine or food-contact service and Poor formability compared with 304. We state these plainly so the grade is chosen for the right service.
Our published range covers thickness 0.3 mm, 8 mm, width 100 mm, 2000 mm and coil id 508 mm, 610 mm. Standards include ASTM A240 / ASME SA-240, ASTM A480 and EN 10088-2. Finishes and conditions include No. 1, 2B, 2D, BA, No. 4, Hairline and Mirror.
high-volume turned components, shafts and spindles, nuts, bolts and screw machine parts and bushings and fittings. Typical industries: automotive, valves & pumps, electronics and plant engineering. We supply across India and export to markets in the Middle East, Africa, Europe, Asia, North America and South America.
Material is supplied with documentation, tested in house across 18 listed testing facilities, and covered by our ISO 9001:2015 quality management system. Rajgranth Metal & Alloys has been trading since 1980, is self-funded and debt-free, and despatches most orders from its Mumbai stockyard within two days.
Send the size, quantity and standard. We will confirm availability against stock and come back with price.
