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ASTM A178 Electric resistance welded carbon steel and carbon mangaese steel boiler and superheater tubes

 

Applications: for Boilers,Superheaters, Heat-Exchangers, Condensers, Boiler flues, superheater flues and safe ends

 

Material:  Carbon Steel and carbon manganese steel

 

Production: Electric Resistance Welding

              
Size range: O.D.:6-127mm     W.T.:0.9-9.1mm      L: according to customer requirement         

 

Steel Grade and Chemical Compositions:
Element	Grade A, Low-Carbon Steel	Grade C, Medium-Carbon Steel	Grade D, Carbon-Manganese Steel
Carbon	0.06-0.18	0.35 max	0.27 max
Manganese	0.27-0.63	0.80 max	1.00-1.50
Phosphorus, max	0.035	0.035	0.030
Sulfur, max	0.035	0.035	0.015
Silicon	-	-	0.10 min

 

Mechanical Properties	Grade A	Grade C	Grade D
Tensil Streghth: min ksi[Mpa]	47[325]	47[415]	70[485]
Yield Point:        min ksi[Mpa]	26[180]	37[255]	40[275]
Elongation:	≥35%	≥30%	≥30%

 

Tolerance for OD and WT(SA-450/SA-450M)
OD in(mm)	+	-	WT in(mm)	+	-
＜1''(25.4)	0.10	0.10	≤1.1/2''(38.1)	20%	0
1''～1.1''(25.4～38.1)	0.15	0.15	＞1.1/2''(38.2)	22%	0
＞1.1/2''～＜2''(38.1～50.8	0.20	0.20
2''～＜2.1/2''(50.8～63.5)	0.25	0.25
2.1/2''～＜3''(63.5～76.2)	0.30	0.30
3''～＜4''(76.2～101.6)	0.38	0.38
4''～＜7.1/2''(101.6～190.5)	0.38	0.64
＞7.1/2～9''(190.5～228.6)	0.38	1.14

 

 

 

Applications: for Boilers,Superheaters,Heat-Exchangers, Condensers

 

 

 

Reference Documents:

ASTM A450/A450M     Specification for General Requirements for Carbon, Ferritic Alloy, and Austenitic Ally Steel Tubes

 

E213    Practice for Ultrasonic Examination of Metal Pipe and Tubing

 

E273    Practice for Ultrasonic Examination of Longitudinal Welded Pipe and Tubing