65G alloy is of structural quality steely with a high carbon content and an amount of alloying additives not exceeding 2.5% in total. Belongs to the family spring-springs steels. It is used for the manufacture of various types of products: from critical components of industrial equipment to cold weapons. Physico-chemical characteristics are determined by GOST 14959-2016.
The 65G marking includes information on the composition of steel, its type and basic properties. The designation begins with a digital code that indicates the amount of carbon in the alloy. The figures mean hundredths of a percent: according to GOST, carbon steel contains at least 0.65%, but not more than 0.7%.
The “G” symbol in the marking of spring-spring steels indicates an increased amount of manganese (compared to the standard value). For 65G alloy, the content range of this alloying element ranges from 0.9% to 1.2%. The addition of heavy metal in such proportions makes it possible to increase important qualifications structural alloy, such as hardness, viscosity and elastic modulus, and improve its hardenability.
In addition to manganese, other alloying elements are also added when making 65G steel. They are not listed in the marking, but are necessary for the alloy to acquire the desired properties. The exact chemical composition of 65G is regulated by GOST and includes approximately 97% iron (Fe). The alloying elements are:
The 65G alloy is characterized by high strength, hardness and wear resistance, which makes it suitable for use in various industries. The required properties are achieved through a specific steelmaking technology. 65G heat treatment includes annealing, quenching and tempering.
65G steel can be processed by conventional methods, but due to its high hardness and strength, it requires low speeds and high cutting forces. Grinding and polishing are also possible, but diamond tools are recommended. Welding this alloy is very difficult: it involves preheating and post-welding heat treatment to avoid cracking and deformation.
The high hardness, wear resistance and toughness of 65G steel make it suitable for use in areas where high strength and durability of installed parts are required. It is used to make a variety of springs and springs for construction equipment, road and railway transport, gears for industrial equipment units, collets, flanges and much more.
One of the most interesting applications of the 65G is the manufacture of bladed weapons, in particular, throwing knives and swords for sports competitions and reconstructions of various historical periods. Unfortunately, this alloy is not suitable for kitchen and hunting knives, as it oxidizes when in contact with water. It is precisely because of their susceptibility to corrosion that when using 65G steel parts, especially in corrosive environments, it is extremely important to provide them with proper care and maintenance.
In addition, although 65G steel is highly durable, it is not suitable for elements and structures subject to impact loads, as this can lead to cracking and destruction of the metal. In such cases, other types of steel, such as low-carbon or medium-carbon, may be more suitable.
In conclusion, it should be noted that 65G steel is a versatile and widely used material in various industries due to its high strength, hardness and wear resistance. However, when choosing an alloy for a particular application, one should take into account its susceptibility to rust and limited suitability for impact loads.
St. Petersburg Precision Alloy Plant supplies 65G high-carbon steel in the form of x/k tapes, manufactured in accordance with GOST 21996-76 “Steel tape cold-rolled heat-treated.” The produced blanks are suitable for creating products of more complex shapes, including all kinds of springs and springs. Contact us, and we will help you find the steel grade that meets your needs.
