Machining allowances and tolerances for steel open die forgings on hammer—Disks,columns,rings and seamless cylindrical sleeves
全国锻压标准化技术委员会
本标准规定了盘、柱、带孔圆盘、圆环、套筒等各类自由锻件的机械加工余量与公差。
本标准适用于含碳量不超过0.9％和其他合金成分总含量不超过4％的碳素钢和合金钢的自由锻件。
凡超越本标准规定范围的自由锻件，其余量与公差由供需双方另行协商确定。
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