Alloy grades

No technological process for the production of finished products can be set to continuous production flow unless the issues of uniformity in the properties and dimensions of the initial blanks are addressed. The quality indicators of products are closely related to the accuracy and quality of the blanks used. A technological process built on the use of blanks with large tolerances, allowances, rough surfaces, heterogeneous material hardness, and significant slopes can lead to large variations in the tolerances of the finished part due to the copying law during mechanical processing.

When choosing materials for parts, the nature of the part’s loading (static, dynamic, or variable load), the effect of the part’s cross-sectional size (scale factor), the design shape (shape factor), and, finally, the nature of the technological processing should be taken into account. The selection of casting alloys for designing cast parts intended for operation under specific conditions is determined by service (mechanical, physical, chemical, etc.) and technological (casting, machinability) properties, as well as cost.

The following materials are used for casting parts: cast iron (gray, modified, high-strength, ductile, alloyed), steel (carbon, alloyed), copper, aluminum, magnesium, zinc, lead, tin, and nickel alloys. When designing cast parts, it is necessary to consider that the mechanical properties of the metal may vary in different thickness sections of the casting and even within a section (in the center and on the periphery), as well as in the upper and lower parts of the casting. This is especially true for cast iron, where the mechanical properties are largely determined by the cooling rate of the casting in the mold. Therefore, parts with varying wall thicknesses have different mechanical properties. Hence, the same formulas cannot be used for calculating cross-sections of castings from different metals and alloys.

The ability to obtain thin-walled, complex-shaped, or large-sized castings without defects is predetermined by the casting properties of the alloys. The most important indicators of casting properties are fluidity, shrinkage (linear and volumetric), tendency to form cracks, tendency to absorb gases, and the formation of gas holes and porosity in castings, among others.

In the process of manufacturing parts, we use well-proven alloys that have allowed us to achieve maximum production efficiency, execution accuracy, and complexity of castings.

Steel: 20L-45L, 20GL, 20GML, 30XML, 40XL, 110G13L
Heat-resistant steel: 35X18N24S2L, 40X24N12SL
Cast iron: ICHH, SCH 15-25, VCH 40-50