By visiting this site, you accept the use of cookies. More about our cookie policy.

Invar 42 pipe


Grade analogue W. Nr. Aisi Uns En Order
42N EP318 1.3917 K94200 Ni42 Buy from stock, view availability

Characteristics of alloy

This alloy relates to a group of precision alloys with a defined TCLE (linear expansion thermal coefficient in a range of temperatures -70º +340ºC, not higher than 4.5 — 5.5x10-6/C°) and is used in electrovacuum equipment. Invar is a precision alloy that possesses unique physical, mechanical characteristics (magnetic, elastic, heating, electrical). It differs with a high accuracy of chemical composition, carefulness of manufacture, processability, an absence of residual elements. An actual category relates to high-alloyed alloys. Such precision alloys are manufactured on a basis of iron, nickel, copper, mangan, cobalt. The marking Ni42 means that alloy contains about 42% of nickel.

Percentage composition:

Ni Cu P Mn Si C Fe S
41.5 — 43 ≤0.1 ≤0.015 ≤ 0.4 ≤ 0.3 ≤0.03 56.14 — 58.5 ≤0.015

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.

Physical characteristics

V/(m/deg) Degree MPa 1/Deg Ohm-m J/(kg/degree)


  20 1,42   580   8200

Mechanical features at a temperature 20 °C.

Product mix KCU Thickness d5 y sv sT Heat treating F.e.
Hammer-hardened tape, GOST 14 080−78   0,8−1.5     930      


Type Description
limitedly weldable 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 the details up to 200−300°C, heat treating (annealing) after welding.
weldable without stint welding is done without further heat treating or previous heating.

Mechanical characteristics

Description Identification
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

Physical characteristics

Description Identification
Modulus of elasticity of first genus [MPa] E
Heating capacity of material (or coefficient of conductivity for heat) [V/(m/deg)] l
Required temperature for obtaining of actual features, [Degree] T
Linear expansion thermal coefficient [1/Degree] (range of temperatures 20°С) a
Electrical unit-area resistance [Ohm-m] R
Density of an actual material, [kg/m3] r
Specific heat of a material [J/(kg/deg)] (range of temperature 20°С) C

Magnetic characteristics

Description Identification
Coercive field (not higher) [A/m] Hc
Magnetic inductive capacity (not higher) [mH/m] Umax
Specific loss (not higher) 50 hz of frequency, magnetic induction 1.0 Т[ B/kg ] P1.0/50
Magnetic T induction, magnetic field strength no less than 100, in magnetic field, [A/m] B100

Invar 42 pipe supplier

«Auremo» company proposes to buy Invar 42 pipe for the most favorable price. There is a wide range of goods of a high quality in stock. An availability of products and efficiency of delivery are conditioned by a fact that we have offices in Moscow, St. Petersburg and cities of Central Europe. Invar 42 pipe price depends on order quantity and additional conditions of supply. If you buy products by wholesale, you will be given special discounts. Buy pipe Ni42 right now!

Buy Invar 42 pipe at a bargain price

All products are certificated. A quality is guaranteed by rigorous technology compliance of manufacture. Our managers are always ready to answer any questions and to give a knowledgeable assistance. A large assortment will not leave you without a choice. You can easily buy goods from Invar 42 pipe supplier by connecting us with a convenient way to you. Phone numbers, e-mail addresses of the closest company’s offices are located in section «Contacts». Order a service «Call-back» and our manager will help you to choose products that will fit your individual requirements. Invar 42 pipe price depends on order quantity and additional conditions of supply.