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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



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