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鞍钢异型钢管厂于1987年2月份开始研制了25A 型空腹钢窗料.这种钢窗料是在原京66型的基础上作了很大的改进。试制结果证明,该产品采用的原料尺寸合适,合圆与成型工艺合理,孔型设计正确,成品精度高,光洁度好,形状正确.这种新型的空腹钢窗料不仅比实腹钢窗料节约金属50%,而且在民用建筑中是以钢代木的良好材料。
Ansteel shaped steel pipe plant in February 1987 began the development of a 25 A-type steel web material on the fast. This steel window material is based on the original Beijing 66 made a great improvement. Trial results show that the product is suitable for the size of the raw materials, round and molding process is reasonable, the hole design is correct, finished high precision, good finish, the shape is correct.This new type of fasting steel window material not only than the actual abdominal steel window material savings Metal 50%, but also in civil construction is a good material for steel on behalf of wood.