Stainless Steels
Austenitic
TOKKIN™ 305M | Non-Magnetic Stainless Steel
Overview & Features
TOKKIN 305M is adjusted these content at the higher level within the range of JIS SUS305, it exhibits increased stability compared to the typical SUS305.
Additionally, with a higher nickel (Ni) content, it has excellent processability and corrosion resistance.
Examples of Applications
Camera Modules/Components, Communication Equipment Parts, Medical Equipment, Indwelling Needles, Motor Parts
*Due to its non-magnetic properties, it is used for applications where magnetism is not desired, such as in electronic components.
Available Shapes
Manufacturable Range (COIL, SHEET)
Thickness
0.010-1.5mm
Width
3.0-300mm
Length
COIL or SHEET less than 2000mm
This is the manufacturing range of coils and sheets we manufacture.
Standards
TOKKIN's own grade of steel.
Overseas standards are listed as equivalent or similar to our materials, so please use them as a reference.
JIS
SUS305 (G4305)
UNS
S30500
AISI
305
EN
1.4303
ISO
X4CrNi18-12
Chemical Composition
Physical Properties
Density
7.93 g/cm³
Specific Heat
502 J/(kg・K)
Electrical Resistivity
72 μΩ・cm
Young's Modulus
193 GPa
Thermal Expansion
17.3×10-6/K
Thermal Conductivity
16.3 W/(m・K) (100℃)
Mechanical Properties
The table below shows approximate values of mechanical properties for annealed finish and full hardened finish.
We can manufacture products in the desired hardness (finish) between annealed finish and full hardened finish, but some finishes may not be available depending on the plate thickness, so please contact us first.
*For ultra-thin foil, soft materials such as annealed or 2B finish may not be applicable due to concerns about defects (folding, wrinkling, etc.).
Cold Working and Magnetic Permeability
The figure below shows the correlation between rolling ratio and hardness and magnetic permeability of TOKKIN 305M.
Austenitic stainless steels represented by SUS304 are nonmagnetic in the solution (annealed) condition, but become magnetic when cold rolled,whereas TOKKIN 305M maintains non-magnetic properties due to its high Ni, Mn, and Cr content.
Also, TOKKIN 305M has a higher amount of these elements within the range of JIS SUS 305, so that it can maintain non-magnetic properties better than JIS SUS 305.
Related Pages
Non-magnetic Stainless Steels
Stainless steels that are not easily magnetized when a magnetic field is applied is called "non-magnetic stainless steel”.
Stainless Steels Foils (Under t0.10mm)
We offer not only thin stainless steel foils, but also propose the appropriate steel grade and temper depending on specific application and use requirements, such as strength, workablility, magnetism, and corrosion resistance.