Material for EM-Tec high precision anti-magnetic tweezers
Introduction
The material used for manufacturing the EM-Tec high precision anti-magnetic tweezers is a selected grade of low carbon AISI 316L stainless steel.
It is used for the following types of EM-Tec tweezers:
- EM-Tec high precision tweezers
- EM-Tec high precision reverse tweezers
- EM-Tec high precision locking tweezers
- EM-Tec high precision mini tweezers
- EM-Tec high precision slim tweezers
- EM-Tec plastic tipped tweezers handles
- EM-Tec ceramic tipped tweezers handles
- EM-Tec wafer tweezers
General remarks:
- AISI 316L is a low carbon austenitic stainless steel (DIN 1.4435, X2CrNiMo 18-14-3)
- Contains 17 – 19 wt% Chromium and contains significant amounts of Nickel and Molybdenum as additional alloy components
- Non-magnetisable
- Can not be hardened by heat treatment
- Can be work hardened, annealing is recommended for stress relieving
- Good corrosion resistance to most chemicals, salts and acids
- Generally used where corrosion resistance and toughness are primary requirements
- Typical applications include tweezers for microscopy, electronic industry, fine mechanics, laboratory and medical in moderately aggressive chemical requirements
Composition of AISI 316L
| Element | Wt. % |
C |
≤0.03 |
Cr |
17.0 – 19.0 |
Ni |
12.5 – 15.0 |
Mo |
2.5 – 3.0 |
Mn |
≤2.0 |
Si |
≤1.0 |
P |
≤0.045 |
S |
≤0.03 |
Fe |
Balance |
Properties of AISI 316L
| Mechanical Properties | |
State |
Annealed |
Density |
8.0 g/cm3 |
Hardness Brinell |
149 |
Hardness Rockwell B |
80 |
Hardness Vickers |
155 |
Tensile strength, ultimate |
515 MPa |
Tensile strength, yield |
205 MPa |
Yield stress, 0.2% |
≤200 Mpa |
Elongation until break |
60% |
Modulus of Elasticity |
200 GPa |
Poisson's ratio |
0.3 |
Thermal Properties |
|
Coefficient of linear thermal expansion |
16 x 10-6 /°C (20-100°C) |
Coefficient of linear thermal expansion |
17 x 10-6/°C (20-300°C) |
Specific heat capacity |
0.50 J/(g.K) |
Thermal conductivity |
15W/(m.K) |
Continuous use (service)temperature |
350°C |
Maximum service temperature (short) |
925°C |
Electrical Properties |
|
Resistivity |
0.75 x 10-4 Ohm.cm |
TSB 50-001010 Material for EM-Tec high precision anti-magnetic tweezers Revision 1
