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
||0.3 — 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]
|Heating capacity of material (or coefficient of conductivity for heat) [V/(m/degree]
|Required temperature for obtaining of actual features [Degree]
|Linear expansion thermal coefficient [1/degree] (range of temperatures 20°С)
|Specific electrical resistivity [Оhm-mm2/m] 0,81
|Density of a material, [kg/m3]
|Specific heat of a material [J/(kg/degree)] (range of temperature 20°С)
|Coercive field (not higher) [A/m]
|Magnetical inductive capacity (not higher) [mH/m]
|Saturation induction 2 T [V/kg]
|Magnetic T induction, magnetic field strength no less than 100, in magnetic field, [A/m]
|Short resistance to rupture [MPa]
|Flow limit (proportional limit load) for permanent change of form [MPa]
|Percent elongation at fracture [ % ]
|Contraction ratio [ % ]
|Impact hardness [ kJ/m2]
|Brinell hardness [MPa]-1 125−195
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79NM wire, rod, bar supplier
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