The brake discs are manufactured using the Chinese HT250 gray cast iron standard (equivalent to the US G3000 standard). The requirements for the three primary chemical elements are: C: 3.1–3.4%, Si: 1.9–2.3%, and Mn: 0.6–0.9%. Mechanical property requirements include a tensile strength of ≥206 MPa, a flexural strength of ≥1000 MPa, a deflection of ≥5.1 mm, and a hardness range of 187–241 HBS.
In English, these components are typically referred to as "brake discs" or "brake rotors," while "brake drum" is the term used for the drum-style counterpart. Additionally, in southern my country, brake discs are sometimes referred to as *shāchē dié* or *zhìdòng dié* (literally "braking discs"); however, these terms all refer to the same component.
