ASTM A178 Carbon Steel Tube
The ASTM A178 standard specifies the minimum wall thickness for resistance-welded pipes made from carbon and carbon-manganese steel. These tubes are commonly used in boiler systems, including boiler flues, superheater flues, 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. Additionally, a crushing test can be conducted upon customer request to ensure quality and performance.
CSC STEEL supplies ERW (Electric Resistance Welded) pipes and tubes in various sizes and configurations. Like other welded and seamless pipes, these ERW tubes can be beveled, threaded, or coupled and are available in black finish, bare, or with protective coatings. In addition to ASTM A178, CSC STEEL also offers ERW pipes in other grades such as ASTM A53, API 5L, and ASTM A252. For precision applications like boilers, superheaters, and heat exchangers, we provide high-quality ASTM A178 ERW tubes. If you need custom solutions for different projects, please refer to our Boiler Tube and Pipe Products section or send us a quote for further assistance.
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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 |
 |
NBN Type |
NBN Grade |
Remarks |
AFNOR Type |
NF Number |
Remarks |
UNI Type |
UNI Number |
Remarks |
A 178
C-Steel Electric-Resistance-Welded Boiler Tubes |
 |
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 |
 |
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| 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) |
 |
 |
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 |
 |
 |
(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 |
| Â |
(STB35) |
 |
A192 |
- |
C |
" |
CFS320 |
C |
 |
 |
 |
" |
TS34c |
C |
 |
 |
 |
 |
| Â |
 |
 |
A226 |
- |
C |
" |
ERW320 |
C |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| Â |
 |
 |
A556 |
GrA2 |
C |
" |
CEW320 |
C |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| Â |
 |
 |
A557 |
GrA2 |
C |
" |
S1 360 |
C |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| Â |
 |
 |
 |
 |
 |
" |
S2 360 |
C |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| Â |
 |
 |
 |
 |
 |
" |
ERW 360 |
C |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| Â |
 |
 |
 |
 |
 |
" |
CEW360 |
C |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| Â |
 |
 |
 |
 |
 |
3606 |
ERW320 |
C |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| Â |
 |
 |
 |
 |
 |
" |
CEW320 |
C |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| Â |
 |
 |
 |
 |
 |
" |
CFS320 |
C |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| Â |
STB410 |
C |
A179 |
GrC |
C |
3059 |
S1 440 |
C |
17175 |
St45.8 |
C |
A49-213 |
TU42c |
C |
2604/2 |
TS9H |
C |
 |
| Â |
(STB42) |
 |
A210 |
GrA1 |
C |
" |
S2 440 |
C |
17177 |
St42.8 |
C |
A49-215 |
TU42c |
C |
" |
TW9H |
C |
 |
| Â |
 |
 |
A556 |
GrB2 |
C |
" |
ERW 440 |
C |
 |
 |
 |
A49-243 |
TS42c |
 |
 |
 |
 |
 |
| Â |
 |
 |
A557 |
GrB2 |
C |
" |
CEW 440 |
C |
 |
 |
 |
A49-245 |
TS42c |
 |
 |
 |
 |
 |
| Â |
 |
 |
 |
 |
 |
3602 |
HFS 410 |
C |
 |
 |
 |
" |
TS42c |
 |
 |
 |
 |
 |
| Â |
 |
 |
 |
 |
 |
" |
CFS 410 |
C |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| Â |
 |
 |
 |
 |
 |
" |
ERW 410 |
C |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| Â |
 |
 |
 |
 |
 |
" |
CEW 410 |
C |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| Â |
 |
 |
 |
 |
 |
3606 |
ERW 440 |
C |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| Â |
 |
 |
 |
 |
 |
" |
CEW 440 |
C |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| Â |
 |
 |
 |
 |
 |
" |
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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