we prashaant steel are exporting of a wide range of copper flanges offers you a supreme quality of copper alloy steel flanges. We are involved in making a resilient range of copper alloy steel flanges which can further be customized and standardized according to client specifications. grade: uns no. C 92200 uns no. C 83600 uns no. 70600, 71500 c 70600 (cu -ni- 90/10) c 71500 (cu -ni- 70/30) uns no c 10100 c 10200 c 10300 c 10800 c 12000 c 12200 specification:- astm / asme sb 61 / 62 / 151 /