In the latest GB/T 1176—2013 «Cast copper and copper alloys», the contents of the chemical elements Mn and Fe of the brass alloy ZCuZn26Al4Fe3Mn3 were adjusted. In the new standard, the specific content of each element is as follows: Cu 60%~66%, Al 2.5%~5.0%, Mn2.0%~4.0, Fe2.0%~4.0, Zn balance.

Brass alloy ZCuZn26Al4Fe3Mn3 mechanical properties (room temperature environment), tensile strength Rm/MPa ≥ 600, yield strength Rp0.2/MPa ≥ 300, elongation A% ≥ 18, hardness HBW ≥ 130 °.

Hunan Jintai Hardware and Machinery Co., Ltd. is a professional manufacturer of brass alloys and other branded copper alloy products. The company regularly commissions an authoritative third-party testing agency (Shanghai Materials Research Institute) to perform physical and chemical analysis of the company's products to ensure that the product quality meets the national standards.