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Precision alloys include special materials that possess not only high performance characteristics of a certain direction, but also precise chemical composition without harmful impurities, thanks to which the characteristics of such raw materials regulated by standards always remain unchanged. Also, similar materials are distinguished by high precision of technological processing. The geometric dimensions of any of the semi-finished products of this type and the quality of its surface always correspond to the highest standards and requirements.
Specifications of 40KhNM alloy
The material labeled 40ХНМ refers to the type of precision alloys with the established parameters of elastic properties. Due to such a feature, such raw materials are widely used for the manufacture of parts, where this indicator is a primary condition for the quality and reliability of the work of the part. The invariable sphere of application of the material remains the production of spring clock mechanisms, various springs of cylindrical and twisted type, as well as surgical products and many other details. Typically, the operating temperature for semi-finished products made from such raw materials as 40KhNM alloy should not exceed four hundred degrees.
|Chemical composition as a percentage|
|1.8−2.2||Up to 0,5||10.74−18.73||15−17||19−21||Up to 0.02||Up to 0.02||39−41|
|Mechanical properties (at 20 ° C)|
|Name of the characteristic||The numerical value of the parameter for the products|
(0.1 to 2 mm)
|Short-term tensile strength, MPa (ss)||3200−3800||1670||2450−2650|
|Yield strength, MPa (sT)||2400−3000|
|Heat treatment||Aging at a temperature of 400−450 ° C, for four hours and quenching at a temperature of 1100 to 1150 degrees with oil||Aging at a temperature of 450 to 550 degrees Celsius for four hours|
|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||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,|
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