Material: AFNOR NF X1NiCrMoCu 31-27-4 Description: Standard Specification for Seemless Steel Tubes for Pressure Purposes Group Name: Ferrous Stainless Steel Alloys Sub Group: AFNOR NF X1NiCrMoCu 31-27-4 Seemless Steel Tubes for Pressure Purposes Application: Intended for Valve, Pump, General Engineering, Automotive and Other Industries Standard: AFNOR-FRANCE