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Standard

ASTM A178 Standard for Welded Carbon Steel Tubes






ASTM A178 covers minimum-wall-thickness, electric-resistance-welded tubes made of carbon steel and carbon-manganese steel intended for use as boiler tubes, boiler flues, superheater flues, and safe ends. Type Cand D tubes are not suitable for safe-ending for forge welding.

The tubing sizes and thickness usually furnished to this specification are 1/2 to 5 in. [12.7 to 127 mm] in outside diameter and 0.035 to 0.320 in. [0.9 to 8.1 mm], inclusive, in minimum wall thickness. Tubing having other dimensions may be furnished, provided such tubes comply with all other requirements of this specification.

Mechanical properties requirements do not apply to tubing smaller than 1/8 in. [3.2 mm[ in inside diameter or 0.015 in. [0.4 mm] in thickness. When these products are to be used in applications conforming to ISO Recommendations for Boiler Construction the requirements of A520 shall supplement and supersede the requirements of this specification.

The values stated in either inch-pound units or SI units are to be regarded separately as standard. W within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must b used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the "M" designation of this specified in the order.

Material Comparison Table (ASTM KS, JIS, DIN, BS, NBN, NF, UNI)

ASTM
UNS NO.
KOREA/JAPANES

GERMAN

BRITISH
BELGIAN
FRENCH
KS/JIS Symbol
KS/JIS
Re
DIN Type

DIN

No.

Re

B.S

B.S Grade
 
NBN Type
NBN Grade
Re
AFNOR Type
NF

A 178

C-Steel Electric-Resistance Welded Boiler Tubes

 
Graade A K01200 STBH 340 / STB 35 D3563 / G3461 St 37.8 17177

1.0315

(7) 3059 ERW 320  
Grade c K03503 SHBH 410 / STB 42 D3563 / G3461 St 42.8 17177 1.0498 (7)  

JIS Number and Corrensponding Foreign Standard

No.

Grade

T

No.

Grade

T

No.

Grade

T

No.

Grade

T

No.

Grade

T

No.

Grade

STB510
C
C
17175
19Mn5
C
A49-213
TU52C
C
2604/2
TS18
(STB52)
C
A49-248
TU52C
C


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ASTM A213 | ASTM A269
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ASTM B161 / ASME SB 161 | ASTM B111
EN 10216-5
ASTM A789 ASME SA 789 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Tubes
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Nickel Alloy Tubing:

UNS N08020 Nickel Alloy 20 Tubing
UNS N02200 Nickel Alloy 200 Tube
UNS N02201 Nickel Alloy 201 Pipe
UNS N04400 400 Nickel Alloy Tubing
N06600 600 2.4816 Nickel Alloy Pipe
N06601 601 2.4851 Nickel Alloy Tubing
N06625 625 2.4856 Nickel Alloy Tubes
N08800 800 Nickel Alloy Tubes
N08810 800H UNS N08810 Nickel Alloy Tubes
N08811 800HT Nickel Alloy Tubes
UNS N08825 825 2.4858 Nickel Alloy Seamless Pipes
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C28000 Brass Seamless Tubes C44300 Brass Seamless Tubes
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C70600 Copper Nickel Tubes
C71500 Copper Nickel Tubes
DIN 2391 Seamless Precision Steel Tubes
EN 10305-1 E215 E235 E355 Seamless Precision Steel Tube Tubing Tubes
DIN 2393 St28 St34.2 St37.2 St44.2 St52.3 Welded Precision Steel Tubes
EN 10305-2 E195 E235 E355 Welded Cold Drawn Precision Steel Tube