Sheet Metal Grade and Thickness Selection
铜板料厚度与状态选型配方
标签：材料选型, 退火铜, 黄铜牌号, 厚度公差
装饰冲压优先选用 T2 紫铜（半硬态）或 H62 黄铜（软态），厚度 0.3–1.2 mm；深拉深件用 H68 黄铜并退火至软态以降低破裂率。下料前用退火消除加工硬化，目标硬度 HV 60–90。批量冲裁建议留单边间隙为料厚的 5%–8%。
For decorative stamping prefer T2 copper (half-hard) or H62 brass (soft), 0.3–1.2 mm thick; for deep drawing use annealed H68 brass to reduce splitting. Anneal the stock before cutting to remove work hardening, targeting HV 60–90. For production blanking keep a single-side clearance of 5%–8% of thickness. ---