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厚度公差 · 板形 · EN 10131 · ASTM A480 · 验收

冷轧不锈钢板厚度公差与板形验收(EN 10131 / ASTM A480 实操)

厚度公差按宽度与厚度分档,板形看不平度(mm/m)。验收要在规定测点测量并对照公差等级,不能只量中间一点。
冷轧不锈钢板验收的两大尺寸指标是厚度公差与板形:
1) 厚度公差:按标准(EN 10131 / ASTM A480 / GB/T 708)分宽度与厚度档;同板内还有"同板差"要求。测量点通常在距边一定距离、沿长度多点(头/中/尾),不能只量中间。 2) 板形:用不平度(mm/m)或 I 单位衡量,包括边浪、中间浪、瓢曲;开平料还要看横向弯曲。 3) 宽度与长度公差:按标准档位;分条料关注宽度公差与毛刺。
验收建议:
• 合同写明公差等级(普通/较严)与板形上限; • 使用校准过的千分尺/测厚仪,记录测点位置; • 对开平、分条、冲压用途,约定更严格的板形与边部要求; • 争议时按标准测点复测,而不是凭手感。
厚度与板形不达标会直接影响下游成材率,验收数据比口头承诺更有价值。
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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