ASTM A178 standard covers carbon steel and carbon manganese ERW pipes, which can be divided into Grade A (low carbon steel), Grade C (medium carbon steel) and Grade D (carbon manganese steel). ASTM A178 ERW steel pipes are mainly used in boilers, superheaters and other applications. Next, we will introduce ASTM A178 ERW steel pipe in detail.
ASTM A178 ERW Steel Pipe Chemical Composition:
|
Steel Grade |
Element |
Chemical Composition, % |
||
|
Grade A, |
Grade C, |
Grade D, |
||
|
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 Steel Pipe Mechanical Properties:
|
Steel Grade |
Item |
Grade A |
Grade C |
Grade D |
|
ASTM A178 |
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 |
ASTM A178 ERW Steel Pipe Tests:
- Chemical composition analysis
- Mechanical property testing (ultimate tensile strength, yield strength, elongation)
- Process performance testing (flattening test, flaring test, bending test, hardness test, blow molding test, etc.)
- Appearance size inspection
- Non-destructive testing
- Hydrostatic test
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