ASTM A192 Seamless Carbon Steel Boiler Tubes and Superheater Tubes For Highpressure Service.
OD: 12.7-177.8mm,TW: 2.2-25.4mm,General Requirements: ASTM A450/A450M
Hot-finished tubes need not be heat treated. Cold finished tubes shall be heat treated after the final cold-finishing at a temperature of 1200°F [650°C] or higher.
Carbon, % 0.06–0.18,Manganese, % 0.27–0.63,Phosphorus, max, % 0.035,Sulfur, max, % 0.035,Silicon, max, % 0.25
Brinell Hardness Number (Tubes 0.200 in. [5.1 mm] and over in 0.200 in.wall thickness)
thickness)：137HB Rockwell Hardness (Tubes less than [5.1 mm] in wall thickness)：77 HRB
Mechanical Tests Required:
Flattening Test,Flaring Test,Hardness Test,Hydrostatic Test
Tensile strength, min, ksi [MPa] 47 ,Yield strength, min, ksi [MPa] 26 ,Elongation in 2 in. or 50 mm, min, % 35