Wuxi Guanglu Special Steel Co., Ltd
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Free Machining AISI 303 EN 1.4305 DIN X8CrNiS18-9 Stainless Steel Round Bars
Stainless Type 303 - a free machining stainless steel
The addition of sulfur to this 18-8 chrome-nickel stainless steel, which is ordinarily tough and
difficult to machine, enhances the alloy's machinability to the degree that it can be readily utilized
for producing parts on automatic screw machines at about 70% of the speed of C1212.
This sulfur modification has led to widespread acceptance and use of this grade in the screw machine industry.
Stainless Type 303 should be considered for use in applications such as shafts, valve bodies, valves,
valve trim, and fittings.
This steel possesses nongalling properties that make disassembly of parts easy-and help to avoid
scratching or galling in moving parts.
It is not recommended for vessels containing gases or liquids under high pressures.
Specifications: AMS 5640, ASTM A314, ASTM A581, ASTM A582, MIL-S-52263, MIL-S-862, QQ-S-764
Austenitic AISI 303, JIS SUS 303, EN 1.4305, DIN X8CrNiS18-9
| Grade | C | Si | Mn | P | S | Cr | Ni |
| 303 | 0.15 max | 1.00 | 2.00 | 0.20 | 0.15 min. | 17.0~19.0 | 8.0~10.0 |
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:
We provide 303 stainless steel, Cold drawn wire, round bar, hexagon bar, surface in peeled, polished, ground.
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Wuxi Guanglu Special Steel Co., Ltd. – your productivity partner for stainless long products.
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Please call +86 510-8181-2873
or send an email to export@guanglusteel.com
