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How is round steel 40Cr named?
1. Round steel 40Cr is an alloy structural steel with moderate price and simple processing. After heat treatment, toughness, plasticity and wear resistance can be obtained. Normalizing can spheroidize the steel structure and improve the cutting performance of blanks with a hardness less than 160HBS.
2. 40Cr steel is an alloy structural steel. 40Cr alloy structural steel is a steel material that complies with GB/T 3077, and its tempered hardness is between 38~45HRc. Delivery hardened less than 250HB after annealing. The mechanical properties of 40Cr are very similar to 35CrMo. But the price of 40Cr is lower than 35CrMo4, which is more economical for users.
3. 40cr round steel refers to a solid long steel bar with a circular cross-section. The specifications are expressed in millimeters of diameter. For example, "50" means a round steel with a diameter of 50 mm. Round steel is divided into three types: hot rolled, forged and cold drawn. The specifications of hot rolled round steel are 5-250 mm.
4. 40Cr round steel is the standard steel grade of my country's GB, and 40Cr steel plate is one of the steels widely used in the machinery manufacturing industry. After quenching and tempering treatment, it has good comprehensive mechanical properties, good low-temperature impact toughness and low notch resistance. The hardenability of steel is good. It can be hardened to Ф28~60mm during water quenching and to Ф15~40mm during oil quenching.
5. Meaning: 40Cr means 40 chromium. Cr is the abbreviation of chrome. 40Cr steel belongs to alloy steel. The hardness after modulation is about HB301-340. Characteristics: Chromium can improve the strength and tempering stability of steel, increase the hardenability of steel, and make it have superior mechanical properties.
6. Round steel 40Cr is an alloy structural steel Shanghai Lijia Special Steel Co., Ltd. According to the standard GB/T 3077-199 characteristics: medium carbon modulated steel, cold heading die steel. The steel is moderately priced and easy to process. It can obtain certain toughness, plasticity and wear resistance after appropriate heat treatment.
