ASTM A178 Carbon STEEL TUBE

ASTM A178 Carbon Steel Tube

The ASTM A178 standard specifies the minimum wall thickness for resistance-welded pipes, commonly used in boiler and heat exchanger applications. These pipes are made from carbon steel or carbon-manganese steel and are typically used in boiler tubes, flues, superheater tubes, and safety ends. The available grades include A (low-carbon steel), C (medium-carbon steel), and D (carbon-manganese steel). The manufacturing process involves heat treatment, controlled cooling, and welding. If required, a crushing test can be conducted to ensure structural integrity.

CSC STEEL specializes in exporting ERW (Electric Resistance Welded) pipes and tubes in various sizes and configurations. In addition to standard ERW pipes, they also offer seamless options. These tubes can be beveled, threaded, coupled, finished in black, or coated with protective layers. Beyond ASTM A178, CSC STEEL provides other types of ERW pipes such as ASTM A53 Structural Pipe, API 5L Line Pipe, and ASTM A252 Piling Pipe. For precision applications like boiler, superheater, and heat exchanger tubes, they offer high-quality ASTM A178 ERW tubes. For custom requirements, customers are encouraged to explore their Boiler Tube and Pipe Products section or submit a quote for tailored solutions.

 

ASTM A178 ERW Pipe/Tube Chemical Composition:

Steel Grade Element Chemical Composition, %
Grade A,
Low-Carbon Steel		 Grade C,
Medium-Carbon Steel		 Grade D,
Carbon-Manganese Steel
ASTM A178 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

ASTM A178 ERW Pipe/Tube Crush Test:

Steel Grade Wall Thickness of Tubes, in. [mm] Height of Crushed Section, in. [mm]
Grade A Tubes Grade C and D Tubes
ASTM A178 0.135[3.43] and under 3/4[19] or until outside folds are in contact Crush tests not required
Over 0.135 [3.43] 1 1/4 [32] ...

ASTM A178 ERW Pipe/Tube Mechanical Properties:

ASTM A178 Grade C Grade D
Tensile Strength, min, ksi [MPa] 255 275
Yield Strength, min, ksi [MPa] 415 485
Elongation in 2 in. or 50 mm, min, % 30 30

Comparison Tables (ASTM, JIS, DIN, BS, NBN, NF, UNI):

ASTM STANDARD UNS NO. KOREA/JAPANESE GERMAN BRITISH BELGIAN FRENCH ITALIAN
KS/JIS Symbol KS/JIS Number Remarks DIN Type DIN Number Material Number Remarks B.S Number B.S Grade Remarks NBN Type NBN Grade Remarks AFNOR Type NF Number Remarks UNI Type UNI Number Remarks
A 178
C-Steel Electric-Resistance-Welded Boiler Tubes		                                      
Grade A K01200 STBH 340 / STB 35 D3563 / G3461 St 37.8 17177 1.0315 (7) 3059 ERW 320               (3)    
Grade C K03503 SHBH 410 / STB 42 D3563 / G3461 St 42.8 17177 1.0498 (7)                   (3)    

JIS Number and Corresponding Foreign Standards:

JIS ASTM BS DIN NF ISO Index Number
Standard Number Grade Type Standard Number Grade Type Standard Number Grade Type Standard Number Grade Type Standard Number Grade Type Standard Number Grade Type
G3461 STB340 C A161 LC C 3059 HFS320 C       A49-245 TS34e C       C010
  (STB35)   A192 - C " CFS320 C       " TS34c C        
      A226 - C " ERW320 C                    
      A556 GrA2 C " CEW320 C                    
      A557 GrA2 C " S1 360 C                    
            " S2 360 C                    
            " ERW 360 C                    
            " CEW360 C                    
            3606 ERW320 C                    
            " CEW320 C                    
            " CFS320 C                    
  STB410 C A179 GrC C 3059 S1 440 C 17175 St45.8 C A49-213 TU42c C 2604/2 TS9H C  
  (STB42)   A210 GrA1 C " S2 440 C 17177 St42.8 C A49-215 TU42c C " TW9H C  
      A556 GrB2 C " ERW 440 C       A49-243 TS42c          
      A557 GrB2 C " CEW 440 C       A49-245 TS42c          
            3602 HFS 410 C       " TS42c          
            " CFS 410 C                    
            " ERW 410 C                    
            " CEW 410 C                    
            3606 ERW 440 C                    
            " CEW 440 C                    
            " CFS 440 C                    
STB510 C             C 17175 19Mn5 C A49-213 TU52C C 2604/2 TS18 C  
(STB52)               C       A49-248 TU52C C        

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