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Data Sheet:

  Alloy 303 

Chemical Composition Limits

Weight % C P Si Ni Mn S Cr Fe

303

0.12 max 0.20 max 1.00 max 8-10 2.00 max 0.150 min 17-19 Bal

  

Type 303 is a free machining stainless steel. Due to the addition of sulfur this 18-8 chrome nickel stainless steel has enhanced machinability where before it was tough and difficult to machine.   Type 303 is widely used in the screw machine industry, as well as for use in shafts, valves and fittings.  Type 303 is not recommended for vessels containing gases or liquids under high pressure.

  

Availability

Alloy 303 is available in Bar (Round, Flats, Hexagon, Squares), Plate, Wire.

View stock list for further information Plate Stock List. For all other stock availability contact Sales.

  

Specifications

Type 303 Se l Ann AMS 5640 Type 2, AMS 5641, ASTM A 320 Grd B8F CL 1, ASTM A 484, ASTM A 582, MIL S 7720, MIL W 52263, QQ-S-763C, QQ-S-764 B
Type 303 Se l Hi Tensile AMS 5738, ASTM A 320 GRD B8F CL2, ASTM A 320 Grd CL 2 (EXC FLTS), ASTM A 484, MIL S 7720, MIL W 52263, QQ S 763C, QQ S 764
Type 303 SULF ANN AMS, 5640 Type 1, ASTM A 320 Grd B8F CL1, ASTM A 484, ASTM A 582, MIL S 7720, MIL W 52263, QQ S 763 C, QQ 764 B
Type 303 SULF B ASTM A 320 B8F CL2, ASTM A 484, MIL S 7720, MIL W 55263, QQ S 764A

    

Typical Mechanical Properties (Room Temperature)

1"(25.4mm) round bar, annealed 1900ºF (1038ºC)

Type 303

Grade  Ultimate Tensile Strength (MPa) Yield Strength 0.2% (MPa) Elongation 2" (%) Reduction of Area (%) Brinell Hardness
Type 303 621 241 50 55 160

  

Other Specifications

WS 1.4305

 

Disclaimer

Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

  

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