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2B · BA · No.4 · 表面 · 验收

2B / BA / No.4 表面:从工艺到验收

2B 为冷轧退火酸洗后平整的通用表面;BA 为光亮退火,表面更亮更平整;No.4 为磨砂拉丝面。验收应明确表面等级、粗糙度与允许缺陷。
2B:冷轧后退火酸洗并经平整,表面呈均匀亚光,是最常用等级,适合一般深冲、厨具与工业件。 BA:在保护气氛下光亮退火,表面光亮、反光均匀,适合家电面板、装饰与后续镀膜。 No.4:用磨料拉丝形成短直纹,适合电梯、建筑装饰与厨房台面;纹路方向、粗糙度需约定。 验收建议:1)明确标准(如 ASTM A480 / EN 10051)与表面代号;2)约定粗糙度 Ra 与光泽度范围;3)约定允许缺陷(划伤、辊印、色差、氧化色)与修磨限度;4)BA 面要特别关注保护膜与运输擦伤。
Compiled by SteelWe editors and industry experts. For industry exchange only; not trading or investment advice. Cite the source when quoting.
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