1、GB3630-82表2mm厚度允许偏差厚度宽度宽度允许偏差长度长度允许偏差一级二级0.01-0.020.0020.00330-1202.0200以上0.02-0.050.0030.00430-1202.0200以上0.05-0.070.0050.00630-1202.0200以上0.07-0.090.0060.00830-3002.0200以上一0.1-0.20.0150.0250-3002.0100-10003.00.2-0.30.020.0350-2002.0100-10003.00.3-0.50.030.0450-2002.0100-10003.00.5-0.80.040.0650-20
2、02.050-7003.00.8-1.00.060.0850-2002.050-7003.01.0-1.50.080.150-2003.050-7004.01.5-2.00.l20.1450-2003.050-7004.02.0-3.00.160.1850-2005.050-6005.03.0-4.00.180.20502005.050-5005.0.4.0=6.00.200.2450-2005.050-3005.01.2.2箔材表面应平整，允许有不明显的波浪，但当卷在直径为5060mm的卷筒上时，其波浪应消除。1.2.3板材和片材的边部应剪切整齐，无裂口。1.3标记示例用Nb1制造的、M状态
3、、精度为一级、厚度为0.5mm、宽度为200mm、长度为450mm的铌板材标记为：板Nb1M一级精度0.5200450mmGB3630一83。2技术要求2.1化学成分各种牌号的化学成分应符合表3的规定。表3杂质含量，%不大于牌号Nb含量FeSiMoCr0NHCNbl0.0050.0050.010.0020.0020.020.020.0020.02余量Nb20.030.020.050.0050.010.030.050.0050.03余量FNbl0.010.010.020.0050.0050.040.0350.0020.03余量FNb20.040.030.050.010.010.080.050.0050.05余城2.2力学性能当合同中注明要测定产品的力学性能时，铌材的室温纵向力学性能应符合表4的规定。2
