Ni42 wire, rod, bar. Invar 42
|Grade||analogue||W. Nr.||Aisi Uns||En||Order|
|42Н||EP318||1.3917||K94200||Ni42||Buy from stock, view availability|
Ni42 wire, rod, bar supplier
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A name of this alloy originates from a word «invariant» which means «unchanged» and corresponds a truth because TCLE of Invar almost does not change in a temperature range -70º — +340ºC. This alloy relates to a group of precision alloys with a minimal TCLE in a range of temperatures -70º +340ºC, not higher than 4.5 — 5.5x10-6/C°) and is used in electrovacuum equipment. A precision alloy Invar 42 possesses unique physical, mechanical characteristics (magnetic, elastic, heating, electrical). It differs with a high accuracy of chemical composition, carefulness of manufacture and processing, an absence of residual elements. This category relates to a group of high-alloyed alloys. Such alloys are smelted on a basis of iron, nickel, copper, mangan, cobalt.
|41.5 — 43||≤0.1||≤0.015||≤ 0.4||≤ 0.3||≤0.03||56.14 — 58.5||≤0.015|
A usage of alloyed steels depends on work condition. Invar is a high-alloyed steel that is used in elastic details and is exploited at temperature to 300 °C. In comparison with analogous materials, this alloy possesses a high continuous operating period in specific conditions. It demonstrates an excellent resistance to a grain boundary attack and to corrosion cracking.
Mechanical features of alloy at a temperature 20 °C.
|Product mix||KCU||Size||d5||y||sv||sT||Heat treating||F.e.|
GOST 14 080−78
|limitedly weldblea||welding is possible at heating to 100−120°С and last heat treating|
|hardly weldable||in order to obtain a qualitative welded joints, it is necessary to perform the following operations: before welding to heat details up to 200−300°C, heat treating (annealing) after welding|
|weldable without stint||welding is done without further heat treating or previous heating|
|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]||HB|
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