Our consultant will save your time!



sales department

+38 (063) 073-44-92

The alloy of the precision type with the 36N marking can be attributed to a group of materials called Invars. The basis of this raw material is iron and nickel, and silicon, manganese, aluminum, vanadium, copper and molybdenum are the alloying elements. Precise chemical composition without harmful impurities determines the high quality of raw materials of this type and its high performance parameters.

Characteristics of 36N alloy

This material refers to a large group of precision raw materials with specified temperature expansion parameters. This parameter, which has a low value, basically determines the scope of such semi-finished products. It is important to note that in a fairly wide temperature range (from minus eighty to plus one hundred degrees Celsius), the linear expansion coefficient of Invar is practically unchanged. Most often, a material with such a marking is used in the production of accurate measuring and control equipment, which, against the background of sensitivity to not very large temperature differences, can maintain unchanged geometric dimensions. Also a similar material is used in the production of bimetallic compounds, its combination with some other steels can improve the original properties of the original source. Sometimes this raw material is produced by the method of smelting by vacuum-induction method, in this case the symbolism of «VI» is added to the labeling of the product. Currently, semi-finished products made from alloy 36N are quite diverse, you can find almost everything from tape, rod or sheet, to a pipe and a forged product.


Chemical composition as a percentage
manganese silicon carbon nickel chromium phosphorus sulfur molybdenum copper aluminum vanadium
0.3−0.6 Up to 0,3 Up to 0.05 35−37 Up to 0,15 Up to 0,015 Up to 0,015 Up to 0,1 Up to 0,1 Up to 0,1 Up to 0,1
physical characteristics
Name Units Symbol The numerical value
Elastic modulus MPa E * 10−5 1.42
Measurement temperature ° C T 20
Density Kg / m 3 R 8200
Electrical resistance (specific) Omxm Rx10 9 420
The index of linear temperature expansion (at t = 100 ° C) 1 / deg Ах10 6 1.5
Mechanical properties (at 20 ° C)
Name of the characteristic The numerical value of the parameter for products according to GOST 14080−78
Thinning tape
Short-term tensile strength, MPa (ss) 930

Magnetic characteristics

Coercive force (not more than), (A / m) Ns
Magnetic permeability (not more than), (MH / m) Umax
Specific losses (no more) at a frequency of 50 Hz and a magnetic induction of 1 T, (W / kg) P1,0 / 50
The magnetic induction T (at least), with a magnetic field strength of 100, in magnetic fields (A / m) B100

Weldability indexes

The alloy has limitations on weldability The welding process requires some preliminary preparation (warming the contacting surfaces to one hundred and one hundred and twenty degrees and subsequent heat treatment of the seam zone)
The alloy has no weld constraints No additional operations are required
Hard to weld material It is necessary to warm the contacting surfaces to two hundred or three hundred degrees, the subsequent annealing and heat treatment after the end of the welding process

Buy at the best price

On our site there is a wide range of products from precision materials. High quality products and the absence of intermediaries (working directly with the manufacturer) determine the most profitable proposals for purchasing raw materials for solving any problems of modern industry. Delivery in a short time in almost any region of the country and compliance of all products of regulatory documentation for it has long won the love and trust of regular customers. Due to the relatively low cost and wide range and model range of semi-finished products of the brand 36N, they enjoy constant demand in all areas of production.