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ASTM A192 Seamless Carbon Steel Boiler Tubes and Superheater Tubes For Highpressure Service.

Size:

OD: 12.7-177.8mm,TW: 2.2-25.4mm,General Requirements: ASTM A450/A450M

Heat Treatment:

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.

Chemical Composition:

Carbon, % 0.06–0.18,Manganese, % 0.27–0.63,Phosphorus, max, % 0.035,Sulfur, max, % 0.035,Silicon, max, % 0.25

Hardness Requirements:

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

Mechnical Propertise:

Tensile strength, min, ksi [MPa] 47 [325],Yield strength, min, ksi [MPa] 26 [180],Elongation in 2 in. or 50 mm, min, % 35