... (inch)Concavity(mm)1230533/41913330312514355311/238164103/3.511/2 , 17/8 , 238/47/51174303/3.5/421/457184603/3.5/411 ... /457205103.5/4.513/4 , 2 , 21/4 , 21/244/51/57/63215353.5/4.521/263225603.5/4/5/621 ... /476/81/83/89/95266605/5.5/6/7/833/8 , 31/2 , 4 , 41/4 , 41/286/89/102/108 ... , 41/4 , 41/2 , 5 , 51/8102/108/114/127/130307606/7/8/10/1143/4 , 51/4121/133compositionCMnSiSPNiCrCuNbcontents %0.62~0.700 ...