ASTM A179 ASME SA179(SA-450/SA-450M) Seamless steel tubes, Seamless cold drawn low carbon steel heat exchanger and condenser tubes. For heat exchanger application, For cold condenser applications For boilers, for refrigirator heating and cooling system For tubular heat exchangers, similar heat transfer apparatus Size: OD: 6-114mm WT: 1-15mm Max length: 32m Chemical compositions: C: 0.06-0.18 Mn: 0.27-0.63 P: 0.035 S: 0.035 Richard Shen Ningbo New-Era Steel Tube Co,.Ltd Tel: 0086-574-87334900 Fax: 0086-574-87715158 Mobile: 0086-(0)137 3616 4628 Email: Richard831228@gmail.com Msn: Richard831228@hotmail.com Skype ID: Richard831228