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Material for EM-Tec high precision carbon steel cutting tweezers

The EM-Tec high precision cutting tweezers are made from DIN 1.1221 hardened carbon steel and includes the following tweezers.

It is used for the following products:

#50-005015 EM-Tec 15.CS high precision cutting tweezers, 12mm angled blades
#50-005020 EM-Tec 15P.CS high precision cutting tweezers, 12mm parallel blades
#50-005025 EM-Tec 15M.CS high precision cutting tweezers, 10mm angled blades
#50-005152 EM-Tec 152.S high precision mini-cutting tweezers, 4mm angled blades


General remarks:

  • Carbon steel DIN 1.1221 (Ck 60, AISI 1060)
  • Contains 0.57-0.65 wt% carbon
  • Magnetisable
  • Hardened by heat treatment with maximum hardness of 57 HRC
  • Poor corrosion resistance
  • Ideal for cutting soft metal wires (copper, gold, silver, aluminium, steel)
  • Typical applications include tweezers and cutting tools for fine mechanics, watch making, jewelery and electronic industry

General composition of Carbon steel 1.1221

Element

Wt. %

C

0.57 – 0.65

Mn

0.60 – 0.90

Cr

≤0.4

Ni

≤0.4

Mo

≤0.1

Si

0.15 – 0.35

P

≤0.035

S

≤0.035

Fe

Balance


Properties of Carbon Steel 1.1221

Mechanical Properties

State

Hardened

Density

7.9 g/cm3

Hardness, HRC

55-57

Tensile strength, ultimate

850 - 1000 MPa

Tensile strength, yield 0.2%

550 MPa

Elongation at break

12%

Modulus of Elasticity

200 GPa

Poisson's ration

0.29

Thermal Properties

Coefficient of linear thermal expansion

11 x 10-6 /°C   (20-100°C)

Coefficient of linear thermal expansion

12 x 10-6 /°C   (20-300°C)

Specific heat capacity

0.502 J/(g.K)

Thermal conductivity

52W/(m.K)

Continuous use (service) temperature

450°C

Maximum service temperature (short)

500°C

Electrical Properties

Resistivity

0.8 x 10-4 Ohm.cm


TSB 50-005015 Material for EM-Tec high precision carbon steel cutting tweezers Revision 2.



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