本文件规定了压水堆核电厂用1、2、3级碳钢和合金钢螺母(以下简称1、2、3级螺母)的技术要求、在室温(10 ℃~35 ℃)下的试验方法和标志与包装。
注1:产品尺寸按相应产品标准或图纸规定。
本文件适用于1、2、3级碳钢和合金钢螺母:
a)由碳钢或合金钢制造的;
b)符合GB/T 192和GB/T 196规定的普通螺纹;
c)粗牙螺纹M5~M64,细牙螺纹 M8×1~M64×4;
d)符合GB/T 193规定的直径与螺距组合;
e)符合GB/T 197、GB/T 9145规定的公差。
本文件未规定以下性能要求:
——有效力矩型螺母锁紧性能(见GB/T 3098.9);
——扭矩夹紧力性能(试验方法见GB/T 16823.3);
——可焊接性;
——耐腐蚀性。
其他堆型核电厂用1、2、3级碳钢和合金钢螺母也可参考使用本文件。
注2:按本文件生产的紧固件适用的最高使用温度为370 ℃。当使用温度超过370 ℃, 建议使用者向有关方面专家咨询。
定价: 38元 / 折扣价: 33 元 加购物车
This standard specifies the spheroidite examination and grading for low carbon structural steel, low carbon alloy structural steel, medium carbon carbon structural steel and medium carbon alloy structural steel after spheroidizing annealing.
This standard is applicable to the spheroidite examination and grading for low and medium carbon structural steel after spheroidizing annealing and before cold forming such as cold heading and cold extrusion.
定价: 372元 / 折扣价: 317 元 加购物车
This standard specifies contents of the raw materials and requirements,inspection requirements,grade and evaluation of microstructure after quenching,etc.of commonly used medium-carbon structural steel and medium-carbon alloy structural steel.
This standard is applicable to the examination and evaluation of microstructure of medium- carbon structural steel and medium-carbon alloy structural steel parts after quenching and tempering.
This standard is not applicable to the evaluation of microstructure containing decarburization,overfiring and under austempering state of medium-carbon structural steel and medium-carbon low-alloy structural steel parts after quenching and tempering.
定价: 816元 / 折扣价: 694 元 加购物车