ASTM A178 Boiler Tube

ASTM A178 for Electric-Resistance-Welded Carbon Steel and Carbon-Manganese Steel Boiler and Superheater Tubes ASTM A178 Boiler Tubes are known for their resistance to corrosion and tolerance for withstanding temperature variations.North-Pipe offering ASTM A 178 grade A &C&D Boiler Tubes that used in varied industrial applications.   1)Materials GradeA ,Grade C,Grade D Bolier steel tube. 2)Size OD 1/2in-5in(12.7-127mm) 3)Wall thickness 0.035in-0.360in(0.9-9.1mm) 4)Different name Condenser steel tube,heat-exchanger tube,low carbon steel pipe,Resistance welded steel tube ,Bolier flues,Spoerheater flues and safe ends,ERW carbon steel pipes. 5)Chemical Composition:

Element	Grade A	Grade C	Grade D
	Low carbon steel	Medium carbon steel	Manganess steel
C%	0.06-0.18	0.35Max	0.27Max
Mn%	0.27-0.63	0.80Max	1.00-1.50
P%	0.035	0.035	0.030
S%	0.035	0.035	0.015
Si%	…..	…..	0.10Min

  6)Mechanical Propertise:

	Grade A	Grade C	Grade D
Tensile Strength loading Ksi (Mpa)	=47(325)	60(415)	70(485)
Yield Strength Loading Ksi(Mpa)	=26(180)	37(255)	40(275)
Elongation (50mm)%	=35	=30	=30

  7)Referenced Documents: ASTM standards: A450/A450M Specification for General Requirements for Carbon,Ferritic Alloy,and Austenitic Alloy steel tubes. E213 Practice for Ultrasonic Examination of Metal pipe and tubing. E273 Practice for Ultrasonic Examination of Longitudinal Welded Pipe and Tubing. 8)Manufacturing Process:ERW 9)Heat treatment: After welding,all tubes shall be heat treated at a temperature of 1650°F(900?) or higher and followed by cooling in air or in the cooling chamber of a controlled-atmosphere furnace,Cold-drawn tubes shall be heat treated after the final cold-draw pass at a temperature of 1200°F(650?)or higher. Surface Condition: Finished tubes shall be free of scale,A slight amount of oxidation will not be considered as scale. 10)Mechanical Tests Required: Flattenting Test Flaring test Flange test Crush test Tension test Reverse Flattening test Hydrostatic or Nondestructive Electric Test