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舞钢主导修订的两项国家标准顺利通过审定

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2023-01-12

2022年12月6日、7日，全国钢标准化技术委员会钢板及钢带分技术委员会以网络会议的形势，组织召开了4项国家标准审定会，来自40家钢铁企业、下游用户及科研院所的60多名专家参会。此次会议上，由河钢集团舞钢公司主导修订的《厚度方向性能钢板》和《建筑结构用钢板》顺利通过专家组的审定，且各位专家一致认为这两项国家标准的技术指标均达到国际先进水平，进一步彰显了舞钢在国际及行业的话语权和地位，充分体现出舞钢在厚度方向性能钢板与建筑结构用钢领域的先进性。

在项目结构使用或建造过程中，由于焊接或其它因素的作用，会使材料承受沿板厚方向的应力，导致产生平行于轧制方向的阶梯状裂纹，称为层状撕裂。对发生层状撕裂事故钢材进行的试验研究表明，其厚度方向断面收缩率一般低于15%。一般的厚钢板较易产生层状撕裂，钢板越厚，非金属夹杂缺陷越多，则焊缝越厚，焊接应力和变形也越大。为了防止板材层状撕裂状况频发，舞钢率先研制出了厚度方向性能钢板，而且Z向的断面收缩率在15%以上。1985年，舞钢主导制定的GB/T 5313《厚度方向性能钢板》首次发布，并于2010年完成第一次修订。本次由舞钢主导修订的标准内容主要聚焦于补充与标准相关的术语和定义，增加了探伤级别规定及其检验所依据的标准，补充了对部分厚度条件下，带延伸以及不带延伸部分的试样的尺寸规定。

舞钢主导制定的《建筑结构用钢板》国家标准于2005年首次发布，极大地促进了我国建筑钢结构发展，高性能建筑结构用钢板被广泛用于大型钢结构建筑如国家体育场（鸟巢）、北京国家大剧院等地标性建筑。该标准在2015年完成第一次修订。本次由舞钢主导修订的标准，除了进一步完善钢材的技术要求外，还增加了高性能钢板在下游应用的实际情况等，提高了《建筑结构用钢板》标准的适用性和先进性。

公司党委理论学习中心组组织专题学习研讨

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