303 Stainless Steel
UNS S30300 | ASTM A895 | ASTM A582 | AMS 5640303 Stainless Steel
303 is considered a free machining stainless as it machines better and tooling lasts longer than compared to other grades of 300 series stainless (such as 304L or 316L). As an austenitic stainless steel, 303 cannot be heat treated in order to improve strength. 303 is used in a variety of applications that require machining, grinding or polishing paired with good resistance to corrosion.
Common industry/applications are: Aerospace, Screw Machine Production Parts, Valve and Pump Components, Fittings, Medical and Pharmaceutical, Pulp and Paper Processing, and General Industry.
Product forms include round bar, hex, square, rectangle & flat bar, plate & sheet, hollow bar, tubing and pipe, and forgings.
Standards
- UNS S30300
- ASTM A895
- ASTM A582
- AMS 5640
Characteristics
- Excellent machinability compared to 304 or 316L whilst maintaining the strength and corrosion resistance.
Physical Properties
- Density: 0.285LB/in³ (7.90g/cm³)
- Melting Point: 2550–2590°F (1398–1421°C)
- Modulus of Elasticity: 28.0x10⁶psi (193 GPa)
- Magnetic Permeability: 1.008 Max @ 200 H (Annealed)
Chemical Composition
C
Mn
S
P
Si
Cr
Ni
Mo
Mechanical Properties
Mechanical properties can be altered (increased/decreased) by the addition of other chemical elements like Selenium (Se) to form 303Se. However, these grades are more specialized and may not be available in all forms and sizes.
KSI (MPa)
KSI (MPa)
HRB (BHN)
Specialty Steel Supply makes all reasonable efforts to ensure the accuracy and correctness of the data found on this website and the associated documents but makes no representations or warranties as to the data’s accuracy, correctness or reliability. All data are for general information only and not for providing design advice. It is the responsibility of the user to test specific alloys under actual service conditions to determine their suitability for a particular purpose.
Stainless and Alloys
We collaborate to help you exceed requirements by bringing your best ideas forward and eliminating non-conformance.
Specialty Steel Supply Inc. is one of the largest distributors of austenitic, precipitation hardened, duplex and martensitic stainless steels. We have a wide range of products and types of stainless steel round bar and our well trained staff offers many years of experience in all aspects of the steel industry. Our ability to procure and source metals from all parts of the world allows us to stay competitive in a global marketplace. We are committed to developing and servicing just in time inventory programs.
Specialty Steel Supply
19201 Circle Lake Drive
Pinehurst, Texas 77362
info@specialtysteelsupply.com
Business Hours
Sunday - Closed
