Wire, rod, bar made of alloy 79NM
Grade 79NM consist of Ni (78,5−80%) and ferrum (the rest). It has a high electrical resistivity and firmness in an aggressive environment. For strengthening of electromagnetic properties, it must be alloyed with such elements as chrome, cuprum, molybdenum. A smelt is done in a vacuum or inert gas. A coiled bar from this steel relates to category of stainless products. A bar has a small cross-section and fixed length. A wire is widely used while welding nickel steels. A rod is used in energetic, chemical, textile and metallurgic industries.
Percentage composition GOST 10994−74
|≤0,02||≤0,02||≤0,15||≤0,15||≤0.03||≤ 0.2||0.3 — 0.5||0.6 — 1.1||3.8 — 4.1||13.8 — 16.8||78.5 — 80|
Bar, rod, wire are the most popular products of high-nickel mill products. Nowadays, they have the widest appliaction as parts of electrotechnical constructions, which are utilized on mechanical engineering and energetics. High-nickel alloys are hard-welded and that. That is why there are made a thermal processing and the last annealing for strengthening of welds. A technical lifetime of such products is very huge, but at high temperatures (900°C) it significantly decreases.
|Modulus of elasticity of first kind [MPa]||E|
|Heating capacity of material (or coefficient of conductivity for heat) [V/(m/degree]||l|
|Required temperature for obtaining of actual features [Degree]||T|
|Linear expansion thermal coefficient [1/degree] (range of temperatures 20°С)||a|
|Specific electrical resistivity [Оhm-mm2/m] 0,81||R|
|Density of a material, [kg/m3]||r|
|Specific heat of a material [J/(kg/degree)] (range of temperature 20°С)||C|
|Coercive field (not higher) [A/m]||Hc|
|Magnetical inductive capacity (not higher) [mH/m]||Umax|
|Saturation induction 2 T [V/kg]||P1.0/50|
|Magnetic T induction, magnetic field strength no less than 100, in magnetic field, [A/m]||B100|
|Short resistance to rupture [MPa]||sv|
|Flow limit (proportional limit load) for permanent change of form [MPa]||sT|
|Percent elongation at fracture [ % ]||d5|
|Contraction ratio [ % ]||y|
|Impact hardness [ kJ/m2]||KCU|
|Brinell hardness [MPa]-1 125−195||HB|
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79NM wire, rod, bar supplier
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