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New nichrome

Alloy grade Ni Mn Cr Si C Fe
Cr20Ni30 OCr20Ni30 30.0 - 31.0 ≤ 6,0 19.5 - 21.5 1,0 - 1,5 ≤ 0.6 base
Cr20Ni35 OCr20Ni35 34.0 - 37.0 ≤ 6,0 19.5- 21.5 1,0 - 1,5 ≤ 0.6 base
X30H70 OCr30Ni70 Rest ≤ 6,0 28.0 - 31.0 1,0 - 1,5 ≤ 0.6 ≤1.00

Characteristics of the alloys

Property X20H35 CR20NI30 CRN70U
Elongation at break (%) >20 > 20 > 20
Tensile strength N/mm2 630-780 630-780 637-784
Density g/cm3 7,9 7,9 8,1
Maximum t° of continuous operation 1100°C 1100°C 1250°C
Electrical resistivity (Ωmm2/m) 1.00 1,04 1,18
Melting point 1390°C 1390°C 1380°C
Linear expansion. Coefficient (αx10-6/°C) 19 19 17
Thermal conductivity 43.7 43.7 45.2
Lifetime, hours '4 thou. '4 thous. '4 thou.

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