Comparison of ASTM A53 and ASTM A106 Steel Pipes
In case ASTM A53 Grade B in ERW (electric resistance welded) pipe, the weld seam shall be done the heat treatment with a minimum 1000°F [540°C]. In this way the no untempered martensite remains. In case ASTM A53 B pipe in cold expanded, then expansion should not exceed 1.5% of the required OD.