Abstract—Boron, as an alloy element, and its compounds are used in a wide range. It is determined that, boron and its compounds increases physical, chemical, mechanical and metallurgical properties of materials. With bronzing, materials get some the properties such as high hardness, high wear, less friction coefficient and high corrosion. In this study, effect on the mechanical properties of boron addition of 60SiCr7 steel were investigated. 60SiCr7 of spring steel, which is relatively low compared with treatment steel ductility by heat treatment in the treatment and in addition, various amounts of boron (ppm ratio) and improving the mechanical properties by alloying has been attempted. As a result of 15-30 ppm added steel in tensile and fracture toughness has improved. Index Terms—Boron, boron steels, mechanical testing. I. INTRODUCTION Boron steels, ideal after heat treatment at high hardness values have reached, also the friction and wear very good resistance against which they often harsh working conditions are suitable for the soil and road handling instruments and agricultural tools to the construction locations are recommended. Boron steels which high hardness and high wear resistance is alloy steels. The boron additive steels, easy to be processed and applied in very good mechanical properties after heat treatment are important features exhibitions. According to the same mechanical properties are cheaper than high alloy steels. With the same mechanical properties are cheaper than high alloy steels. Boron additives steels accompanied by increasingly difficult economic conditions, the manufacturing industry is a good alternative. In addition to the benefits of economy and alloy conservation, boron steels offer significant advantages of better extradability and machinability compared with boron free steels of equivalent hardness [1]. Moreover, steels containing boron are also less susceptible to quench cracking and distortion during heat treatment. Consequently, boron containing carbon and alloy steels are widely used in automotive, constructional, and various other applications. Hardening depth of steel with the addition of the boron element, and has been shown to increase the ability to hardness. Boron over 8 ppm the content is considered as Manuscript received September 26, 2014; revised January 6, 2015. Hayrettin Düzcükoğlu is with Selcuk University, Technology Faculty, Mechanical Engineering Department, Konya, Turkey (e-mail: hayduzcukoglu@hotmail.com). Selman Çetintürk is with Soylu Casting, Konya Organized Industrial Zone, Konya, Turkey. an alloying element. Boron is dissolved in ppm quantities in solid state in steel. The diameter of boron atom is 25% smaller than the diameter of iron atoms. Boron can be made a solid solution with Iron. Boron can be found as both located and interstitial in α-iron. Boron is very slightly soluble in α and γ iron. The γ-iron is 260 ppm at 1170 °C, while the maximum solubility of boron is 80 ppm at 910 °C in α-iron [2]. Boron, the hardenability of the steel is alloying element which increases as the most effective. Boron element, mainly at the grain boundaries in the steel takes place and creates a very small grains sizes Fe 23 (B,C) 6 . It is well-known that a small amount of boron dramatically increases the hardenability of steels. This beneficial effect is attributed to grain boundary segregation previously mentioned, which retards the diffusional transformation of austenite to ferrite by lowering the interfacial energy at the austenite grain boundary [3].The segregation and precipitation of boron have been studied in thermo mechanically processed 0.2C, 0.6Mn and 0.5 Mo steels containing nominally 0,10,20, 50 and 100ppm boron. These steels were hot rolled in the laboratory, and their transformation behavior during subsequent water quenching was examined for different finish rolling temperature (980 °C and 870 °C) and quenching temperatures (730 °C to 950 °C). The results showed that in general, a free boron content of 10 to 20 ppm will provide a boron hardenability increment similar to that for conventional quenched and tempered steels [4]. Boron additive, as properties metal high wear resistance, increased strength, high magnetic permeability, high elasticity, high surface protection, high temperature and corrosion resistance, high heat transfer, high adhesion and cohesion is increasing [5]. It is possible to say that boron minerals may be used in almost countless field as a result of today’s technological advances. Boron minerals with the potential to use almost every field of ındustry be regarded as a basic raw materials for industry. Boron which as alloying elements in iron-based material is be used, must be below 0.1%. The last 10 years; in developed countries such as Germany, USA, Russia, Japan, China, with related to in steel use of boron have been done many studies. These improvements have found many uses at manufacture of materials as cast iron, stainless steel, the cutting tool, the manufacture of electron rods in nuclear reactors. The effects of boron on the hardenability of steel are similar to those obtained with such common alloying elements as manganese, chromium, nickel, and molybdenum, but, unlike these elements, only a minute amount of boron is required. Since boron is relatively plentiful in this country, in many instances it can replace the aforementioned alloying elements, many of which must be imported at considerable expense from countries where political unrest is commonplace, making Hayrettin Düzcükoğlu and Selman Çetintürk Effect of Boron Addition on Mechanical Properties of 60SiCr7 Stell International Journal of Materials, Mechanics and Manufacturing, Vol. 3, No. 2, May 2015 117 DOI: 10.7763/IJMMM.2015.V3.178