Material for Value-Tec fine, industrial and fibre grip tweezers
Introduction
The material used for manufacturing the Value-Tec fine, industrial and fibre grip tweezers is a selected grade of non-magnetic AISI 202 stainless steel.
It is used for the following Value-Tec tweezers:
#50-014010 through #50-014220 Value-Tec fine tweezers
#50-014X20 through #50-014X70 Value-Tec reversed fine tweezers
#50-014310 through #50-014386 Value-Tec industrial strong tweezers
#50-014462 through #50-014482 Value-Tec fiber grip tweezers
General remarks:
- AISI 202 is an austenitic stainless steel (DIN 1.4373, X12CrMnNNi 18-9-5) and is a cost effective replacement for 304, 302 and 310 stainless steel with a lower Ni content
- Contains 17 – 19 wt% Chromium and contains significant amounts of Manganese and Nickel as additional alloy component. N is added to increase strength.
- Normally non-magnetic, but becomes magnetic when cold worked
- Can be hardened by heat treatment and precipitation hardening
- Can be work hardened, annealing is recommended for stress relieving
- Moderate corrosion resistance to most solvents, salts and moderate acids
- Generally used where both strength and corrosion resistance are required
- Typical applications include tweezers, tools, cooking equipment, hose clamps and architectural products
General composition of AISI 202
| Element | Wt. % |
C |
≤0.15 |
Cr |
17.0 – 19.0 |
Ni |
4.0 – 6.0 |
Mn |
7.5 – 10.0 |
Si |
≤1.0 |
N |
≤0.25 |
P |
≤0.06 |
S |
≤0.03 |
Fe |
Balance |
Properties of AISI 304<
| Mechanical Properties | |
State |
Annealed |
Density |
7.8 g/cm3 |
Hardness Rockwell B |
90 |
Hardness Rockwell C |
27 |
Tensile strength, ultimate |
515 MPa |
Tensile strength, yield |
275 MPa |
Elongation until break |
40% |
Modulus of Elasticity |
207 GPa |
Poisson's ratio |
0.29 |
Thermal Properties |
|
Coefficient of thermal linear expansion |
17.3 x 10-6 /°C (20-100°C) |
Coefficient of linear thermal expansion |
17.8 x 10-6/°C (20-300°C) |
Specific heat capacity |
0.50 J/(g.K) |
Thermal conductivity |
16.3W/(m.K) |
Continuous use (service) temperature |
500°C |
Maximum service temperature (short) |
870°C |
Electrical Properties |
|
Resistivity |
0.69 x 10-4 Ohm.cm |
TSB 50-014010 Material for Value-Tec fine, industrial and fibre grip tweezers Revision 1
