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Materials belonging to the class of precision raw materials have a number of unique parameters due to their precise chemical composition and processing principles. All alloys of this type can be divided into several types, which determine the main applications of semi-finished products. Thus, the material having the 32KKD marking is characterized by a strictly regulated coefficient of linear expansion. The sphere of application of such an alloy consists in the manufacture of high-precision measuring equipment, for which the constancy of dimensions is very important when the temperature regime is changed. Moreover, such instruments can be used in different climatic conditions without losing their basic working qualities. In a fairly wide temperature range (from minus sixty to plus one hundred degrees), the linear expansion of a material such as 32KND steel does not rise above one unit per degree.
|Chemical composition as a percentage|
|Up to 0,4||Up to 0,2||Up to 0.05||31.5−33||3.2−4.2||Up to 0,015||Up to 0,015||0.6−0.8|
|Name||Units||Symbol||The numerical value|
|Elastic modulus||MPa||Ex10 -5||1.44|
|Measurement temperature||° C||T||20|
|Electrical resistance (specific)||Omxm||Rx10 9||780|
|The index of linear temperature expansion (at t = 100 ° C)||1 / deg||Ах10 6|
(The samples are quenched at a temperature of eight hundred degrees, and then released at a temperature of three hundred and fifteen degrees. The cooling process can be carried out both in water and using special containers or furnaces.)
|Mechanical properties (at 20 ° C)|
|Name of the characteristic||The numerical value of the parameter for products according to GOST 14080−78|
|Short-term tensile strength, MPa (ss)||930|
|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|
|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||Does not require additional training|
|Material difficult to weld||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
Steel 32KKD is quite popular due to its relatively low cost and high working qualities. On our site there is a wide range of products from such precision raw materials that can satisfy any customer’s needs. The sizes of such semi-finished products are limited to standard series, however, at the request of the customer, it is possible to manufacture products with unique sizes.