Precision alloys GOST

General characteristics

Precision alloys are considered to be materials with certain mechanical properties. These are highly alloyed compounds with precisely defined chemical composition. They are divided into groups according to certain properties. Distinguish steel:

— Soft magnetic;

— Hard magnetic;

— With desired elastic properties;

— With predetermined linear expansion temperature coefficient;

— Superconducting;

— Thermobimetals.

Such alloys have special physical and chemical characteristics. They are distinguished by extreme accuracy of their composition, absence of impurities and thoroughness of production and processing. Most of these alloys are based on iron, chromium, nickel, cobalt, copper, which gives alloys very special qualities that distinguish them from rest. For example, number of magnetically soft alloys (permalloy, permendure, perminvar, ferrite-nickel) or magnetically hard alloys (alni, manganin, wiccalloy). Today it’s difficult to do without alloys with given electrical (alumel, copel, chromel), thermal (insidious, platinum) and elastic properties, without superconducting alloys (based on niobium with Zr, Ti, Mo, Tc, Re).

Short list of precision alloys:

Designation	Or	GOST, TU	Application area
27KH	EP685	10 994−74, 10 160−75	Stators and rotors of electric motors designed for operation at normal and elevated temperatures. Cold rolled ribbons, hot rolled sheets and rods, forged rods. Alloy has high saturation induction.
29NK-vi, 29NK		14 082−78	Thermal coefficient of expansion similar to glass is used to introduce current into electronic devices. Cold rolled strips, wire, hot rolled sheets and rods, forged rods. TKLR alloy below average.
32NK	EP475vi, id	14−1-4422−88, 14−131−493−80	Products with polished surface, complex shapes, line measures of length. Hot rolled and forged bars. Low TCLR alloy.
32NKD	EI630A, superinvar	14 082−78	For parts of instruments of very high accuracy, requiring constant dimensions in temperature range. Cold rolled tapes, wire, hot rolled sheets, hot rolled and forged bars. Minimum or low TCLR alloys.
33NK	N33K17, EP139	14 082−78	Mix with mica, ceramic or glass.
36N, 36N-vi	Invar	14 082−78, 10 994−74	Fragments that do not change size when the temperature of outside air. Cold rolled strips, wire, hot rolled sheets and rods, forged rods. TCLR of alloy is low.
36KNM, 36NKPM	Permalloy	10 994−74, 10 160−75	Fragments that do not change size when temperature of outside air. Cold rolled strips, wire, hot rolled sheets and rods, forged rods. TCLR of alloy is low.
36NHTU	36NHTU-vi, EI702, Elinwar	GOST 14 119−85, 10 994−74	Fragments that do not change size when temperature of outside air. Cold rolled strips, wire, hot rolled sheets and rods, forged rods. TCLR of alloy is low.
36NHTU5M	EP51		For sensors and parts operating at t° up to 350 °C. Cold rolled tapes, wire, hot rolled sheets, hot rolled and forged bars. Corrosion resistant non-magnetic alloys.
36NHTU8M	EP52		For fragments operating at t° up to 400 °C. Cold rolled tape, wire, hot rolled sheet and circle, forged circle. Non-magnetic corrosion resistant alloy.
38NKD		10 994−74, 14 082−78	For sealed glass junctions. Cold rolled tape, wire, hot rolled sheet and circle, forged circle. TCLR below average.
40KHNM	EI995vi	10 994−74	Clock springs, coil springs for t° up to 400 °C, cores of electrical measuring instruments, surgical instruments. Cold rolled tape, wire. Corrosion resistant non-magnetic alloys.
40HNU-VI			Hot rolled and forged circle. Non-magnetic corrosion resistant alloys.
42N, 42N-vi	40N, 42N, N42, Feni	14 082−78	Vacuum technology. Cold rolled tape, wire, hot rolled sheet and circle, forged circle. TCLR below and average.
42NHTU			Cold rolled tape, wire, hot rolled sheet and circle, forged circle. Stably low modulus alloys.
44NHTU			Cold rolled tape, wire, hot rolled sheet and circle, forged circle. Stably low modulus alloys.
45N			Cold rolled strip, hot rolled sheet and circle, forged circle. Alloys with good magnetic permeability and saturation induction.
45NHT	EP218	14−1-3074−80	Cold rolled strip, hot rolled sheet and circle, forged circle. Alloys with low and constant modulus of normal elasticity. Resonators of electromechanical systems.
47ND		14 082−78	For tight contacts with glass, ceramics and mica. Cold rolled tape, wire, hot rolled sheet and circle, forged circle. TCLR below average.
47NHR			Cold rolled tape, wire. TCLR below average.
49KF		10 994−74, 10 160−75	Pole tips and cores of magnets and solenoids. Cold rolled tape, wire, hot rolled sheet and circle, forged circle. TCLR below and average.
49K2 °F, 49K2FA-VI	EP207, Permendur	14−1-1185−75	Pole tips and cores of magnets and solenoids. Cold rolled strip, hot rolled sheet and circle, forged circle. TCLR below average.
50N	50N, EI676, EI467, Permalloy	10 160−75	Soft magnetic alloy for cores of compact power transformers, chokes and relays.
50NP	Permalloy	14−1-841−73	Cores of magnetic amplifiers, switching chokes, rectifiers. Cold rolled tape. Rectangular hysteresis alloys.
50NHS	Permalloy	14−131−722−89	Pulse transformer cores. Cold rolled strip, hot rolled sheet and circle, forged circle. High magnetic permeability, significant electrical resistance.
52N			Cold rolled tape, wire, hot rolled sheet. TCLR below average.
56DGNH			Hot rolled circle, forged circle. Non-magnetic alloy with given thermal expansion coefficient.
68NHVKTU, 68 NHVKTU-VI	EP578, EP578-vi, Permalloy	14−1-4470−88	Elastic elements of sensors designed for operation at t° from cryogenic to 500 °C. Cold rolled strip, hot rolled and forged circle. Corrosion resistant alloy, non-magnetic.
79NM	Permalloy	10 160−75	Soft magnetic alloy for cores of compact transformers, chokes and relays.
80NM			Cold rolled strip, hot rolled sheet and circle, forged circle. Alloys with best magnetic permeability in weak fields.
80NMV-VI			Cold rolled sheet tape. Non-magnetic alloy with specified thermal expansion coefficient.
80NHS	Permalloy	10 160−75	Soft magnetic alloy for magnetic pith cores. Cold rolled strip, hot rolled sheet and circle, forged circle. Cold rolled strip, hot rolled sheet and circle, forged circle.

Technology for producing precision alloys is very different from traditional metallurgy. Purity of alloy itself, absence of impurities is ensured by melting in special conditions, selection of necessary charge for melting, use of special kind of remelting to obtain most pure alloy. Heat treatment of alloys is often carried out in vacuum, hydrogen, inert medium, in order to avoid oxidation, directional crystallization is also used. Qualities necessary for particular alloy are acquired not only by thermomechanical, but also by thermomagnetic processing. Some of alloys are obtained by technologies of composite materials, powder metallurgy. Delivered in form of tapes, wire, pipes, profiles.

Using

Today, production of precision instruments, standards for length measures, tuning forks, physical laboratory equipment, screens and computer memory elements cannot do without alloys with special properties. Without such alloys, it is impossible to manufacture accurate sensors, sensitive elements of devices, unique experimental and small-sized laboratory equipment, energy converters. Production of televisions, watches, radios is also impossible without such alloys. They are basis for progress of precision instrumentation, creation of a variety of components of modern technology. Use of such alloys provides not only special production methods, but also requires high operating culture.

Buy at bargain price

Company «Electrovek-steel» has unlimited range of alloys of highest quality. We deliver at best price from warehouses of Ukraine and Russia. If you are interested in our offer, contact nearest office. Qualified specialists will provide all necessary information regarding supply, price range of alloys, sales conditions. Cost depends on parameters of products, alloy grade and additional delivery conditions.