1. Mechanical properties: When sampling the forging body, the mechanical properties shall not be lower than the following requirements: Tensile strength: ≥ 470Mpa, yield strength: ≥ 355Mpa, elongation rate: ≥ 20%, hardness HB: 145-185. Recommend using materials with 30MnVS6, 25Mn2CrV, and higher performance. 2. Requirement: Have experience in matching forged steel brackets with mainstream domestic vehicle manufacturers or internationally renowned vehicle manufacturers, with a development cycle of ≤ 12 months. IATF16949, ISO14001 and other system certificates within their validity period.