浙江体彩20选5中奖条件:NiCr 70/30

NiCr 70/30 (2.4658) is an austenitic nickel-chromium alloy (NiCr alloy) for use at temperatures up to 1250°C. The 70/30 alloy is characterized by high resistivity and good oxidation resistance. It has good ductility after use and excellent weldability.

Common trade names: NiCr 70/30, Resistohm 70, Nikrothal 70, Chromel 70/30, HAI-NiCr 70, Cronix 70, Inalloy 70, X30H70.

Specifications

UNS N06008
Werkstoff – Nr. 2.4658
DIN 17470 / 17471

Chemical composition

Ni Cr Fe Si Mn C
Bal. 28.0-31.0% Max 1.0% 1.0-1.5% Max 1.0% Max 0.1%

 

Physical properties

Density Electrical
resistivity
at 20°C
Melting point,
°C
Max continuous
operating temperature
in air, °C
Magnetic properties
8.1 g/cm3 1.18 +/-0.05
microhm-m
1380 1250 non-magnetic

 

Mechanical properties

NiCr 70/30
wire, mm
Yield strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Elongation
A %
Hardness Hv
1.0 420 810 30 180
4.0 300 725 30 160

 

Product forms

Product Size, mm Condition of supply
wire 0.2 – 12.0 bright annealed
oxidized
bar 5.0 – 60.0 hot finished
cold finished
peeled
bright turned
bright annealed
strip/ribbon Thickness 2.5 – 5.0
Width 20 – 250
cold finished
bright annealed
foil Thickness 0.05-0.1
Width 5-250
cold finished
bright annealed
stranded wire 2.5 – 3.0 hard
annealed

 

Application

NiCr 70/30 (2.4658) is used for corrosion resistant electric heating elements in industrial furnaces with reducing atmospheres. Nickel Chrome 70/30 is highly resistant to oxidation in air. Not recommend for use in MgO sheathed heating elements, or applications using nitrogen or carburizing atmospheres.

  • electrical parts and electronic components.
  • electric heating elements (home & industrial use).
  • industrial furnaces up to 1250°C.
  • heating cables, mats and cords.