What are the Mainstream Classifications of Plough Disc

Currently, the materials used for plough disc in China's agricultural machinery tillage industry are primarily categorized into three types: plain carbon steel, 65Mn manganese steel, and 30MnB5 boron steel. Among these, 65Mn manganese steel and 30MnB5 boron steel are the absolute mainstream in the market, while plain carbon steel is a low-end, obsolete material rarely used in formal agricultural machinery components. The composition, heat treatment characteristics, hardness, toughness, and wear resistance of different materials vary significantly, directly determining the service life of the discs, their suitability for operational conditions, and usage costs.

I. Ordinary carbon steel

This belongs to basic general-purpose steel, devoid of alloying elements such as manganese or boron for reinforcement. With a simple production process and extremely low cost, it was the earliest material used for rake blades. Its overall hardness is low, toughness is poor, and it wears out easily. Under stress, it tends to deform or fracture, exhibiting extremely weak impact resistance and wear resistance. It is only suitable for small, simple agricultural machinery and minor leveling operations, such as certain soil smoothers, levelers, and ridge-forming blades. Currently, domestic formal agricultural machinery manufacturers have largely phased it out, with only a small number of low-cost small workshops still distributing it, making it a non-mainstream supporting material.

II. 65Mn, commonly known as manganese steel

65Mn high carbon manganese spring steel is a traditional universal core material for rake blades in China, with the highest market penetration and widest application. Steel contains manganese element, and its basic strength and elasticity are better than ordinary carbon steel. Through conventional heat treatment, the basic hardness and elasticity are improved. The material procurement cost is moderate, the process is mature, and the cost-effectiveness is outstanding. It is suitable for most of the domestic circular disc harrow market and light load farming scenarios that involve year-round plowing.

III. 30MnB5 commonly known as boron steel

30MnB5 boron alloy steel is currently the main material for high-end circular disc harrows, disc plough, soil loosening shovel tips, and hoe tips in China. It is also the main material for high-quality hot formed steel in China. It precisely adds trace amounts of boron element on the basis of manganese steel, greatly improving the hardenability of steel and solving the industry weakness of manganese steel's inability to balance hardness and toughness. After heat treatment, it has the triple advantages of high hardness, high toughness, and high impact resistance. Among them, the boron steel harrows and plows produced by FOTMA can benchmark the performance of high-end ploughs abroad and adapt to high-strength and complex farmland operation scenarios.