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.
Stainless Steel 303 (1.4305) Medical Alloy
Stainless Steel 303 is the classic free-machining austenitic stainless steel grade. Our material is certified to ASTM F899 (Standard Specification for Wrought Stainless Steel For Surgical Instruments) and ISO 7151 (Surgical Instruments) making it ideal for a range of applications from sanitary wares to micro-mechanical engineering components.
Stainless steel grade 303 can only be strengthened by cold working, not heat treatment, which can lead to the formation of alpha ferrite martensite, considerably increasing its ferromagnetism up to a relative magnetic permeability > 1. The presence of MnS inclusions and of delta ferrite may increasing the difficulty in polishing this grade.
Non-medical versions of 303 stainless steel are available to AMS 5640 in two different types depending on the addition of Sulphur (AMS 5640 Type 1) or Selenium (AMS 5640 Type 2).
Typical Chemical Composition
Typical Mechanical Properties
Specifications
1.4305
ISO 7151-1 (N)
EN / DIN X8CrNiS 18-9
ASTM F899
JIS 303
UNS S30300
AMS 5640
Availability
303 1.4305 stainless steel alloy is readily available in
Precision ground Round bars : 6mm Dia to 60mm Dia x 3000mm long
Sheets / Plates : 1mm to 25mm thk x 500mm x 1500mm long
Wires : 0.20mm Dia to 4.5mm Dia X Coil / Straight Rods
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