ASTM A333 Tube
What is ASTM A333 steel pipe?
ASTM A333 steel pipe is the standard specification for seamless and welded carbon and alloy steel pipe for low-temperature service or other applications requiring notch toughness. There are several grades of ferritic steel covered by this standard: Grade, Grade 3, Grade 4, Grade 6, Grade 7, Grade 8, Grade 9, Grade 10, and Grade 11. Metals-Piping provides ASTM A333 steel pipes made by the seamless or welded process with the addition of no filler metal in the welding operation except that Grade 4 shall be made only by seamless process. The pipe shall be furnished free of welding repair, either radiographically tested or ultrasonically examined.
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ASTM A333 Steel Pipe Chemical Composition Requirements
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Chemical Composition of ASTM A333 |
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|
Element |
Grade 1, % |
Grade 3, % |
Grade 4, % |
Grade 6, % |
Grade 7, % |
Grade 8, % |
Grade 9, % |
Grade 10, % |
Grade 11, % |
|
C |
0.30 |
0.19 |
0.12 |
0.30 |
0.19 |
0.13 |
0.20 |
0.20 |
0.10 |
|
Mn |
0.40–1.06 |
0.31–0.64 |
0.50–1.05 |
0.29–1.06 |
0.90 |
0.90 |
0.40–1.06 |
1.15–1.50 |
0.60 |
|
P |
0.025 |
0.025 |
0.025 |
0.025 |
0.025 |
0.025 |
0.025 |
0.035 |
0.025 |
|
S |
0.025 |
0.025 |
0.025 |
0.025 |
0.025 |
0.025 |
0.025 |
0.015 |
0.025 |
|
Si |
... |
0.18–0.37 |
0.08–0.37 |
0.10 min |
0.13–0.32 |
0.13–0.32 |
... |
0.10–0.35 |
0.35 |
|
Ni |
... |
3.18–3.82 |
0.47–0.98 |
0.40 |
2.03–2.57 |
8.40–9.60 |
1.60–2.24 |
0.25 |
35.0–37.0 |
|
Cr |
... |
... |
0.44–1.01 |
0.30 |
... |
... |
... |
0.15 |
0.50 |
|
Cu |
... |
... |
0.40–0.75 |
0.40 |
... |
... |
0.75–1.25 |
0.15 |
... |
|
Al |
... |
... |
0.04–0.30 |
... |
... |
... |
... |
0.06 |
... |
|
V |
... |
... |
... |
0.08 |
... |
... |
... |
0.12 |
... |
|
Cb |
... |
... |
... |
0.02 |
... |
... |
... |
0.05 |
... |
|
Mo |
... |
... |
... |
0.12 |
... |
... |
... |
0.05 |
0.50 |
|
Co |
... |
... |
... |
... |
... |
... |
... |
... |
0.50 |
*For Grade 1 and 6, each reduction of 0.01% C below 0.30%, an increase of 0.05 % Mn above 1.06 % would be permitted to a max. of 1.35%.
*For Grade 6, the limit for columbium may be increased up to 0.05 % on heat analysis and 0.06 % on product analysis.
*Generally, the carbon equivalent C.E = [C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15] shall not exceed 0.43% by heat analysis.
ASTM A333 Steel Pipe Mechanical Properties
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ASTM A333 |
Tensile Strength, min. |
Yield Strength, min. |
Elongation %, min. |
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|
Grade |
psi |
MPa |
psi |
MPa |
Longitudinal |
Transverse |
|
Grade 1 |
55 000 |
380 |
30 000 |
205 |
35 |
25 |
|
Grade 3 |
65 000 |
450 |
35 000 |
240 |
30 |
20 |
|
Grade 4 |
60 000 |
415 |
35 000 |
240 |
30 |
16.5 |
|
Grade 6 |
60 000 |
415 |
35 000 |
240 |
30 |
16.5 |
|
Grade 7 |
65 000 |
450 |
35 000 |
240 |
30 |
22 |
|
Grade 8 |
100 000 |
690 |
75 000 |
515 |
22 |
... |
|
Grade 9 |
63 000 |
435 |
46 000 |
315 |
28 |
... |
|
Grade 10 |
80 000 |
550 |
65 000 |
450 |
22 |
... |
|
Grade 11 |
65 000 |
450 |
35 000 |
240 |
18 |
... |
*The elongation values are furnished on the basis of standard round 2 inch or 50 mm(or 4D) specimens.
*Elongation of Grade 11 is for all walls and small sizes tested in full section.
Charpy V-notch Impact Tests of ASTM A333 Steel Pipe
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Impact Requirements for Grades 1, 3, 4, 6, 7, 9, 10, and 11 |
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|
Size of Specimen |
*A |
*B |
||
|
mm |
ft·lbf |
J |
ft·lbf |
J |
|
10 by 10 |
13 |
18 |
10 |
14 |
|
10 by 7.5 |
10 |
14 |
8 |
11 |
|
10 by 6.67 |
9 |
12 |
7 |
9 |
|
10 by 5 |
7 |
9 |
5 |
7 |
|
10 by 3.33 |
5 |
7 |
3 |
4 |
|
10 by 2.5 |
4 |
5 |
3 |
4 |
*A denotes minimum average notched bar impact value of each set of three specimens.
*B denotes minimum notched bar impact value of one specimen only of a set.
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Minimum Impact Test Temperature of ASTM A333 |
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|
Grade |
°F |
°C |
|
1 |
-50 |
-45 |
|
3 |
-150 |
-100 |
|
4 |
-150 |
-100 |
|
6 |
-50 |
-45 |
|
7 |
-100 |
-75 |
|
8 |
-320 |
-195 |
|
9 |
-100 |
-75 |
|
10 |
-75 |
-60 |
|
11 |
-320 |
-195 |
* Impact tests specified for temperatures lower than 70 °F [20 °C] should be made with precautions.
All seamless and welded pipes manufactured to ASTM A333, other than Grades 8 and 11, shall be heat treated to control their microstructure in accordance with one of the following methods:
Normalize by heating to a uniform temperature of not less than 1500 °F [815 °C] and cool in air or in the cooling chamber of an atmosphere controlled furnace. Or normalize as above-mentioned, and, at the discretion of the manufacturer, reheat to a suitable tempering temperature.
For the seamless process only, reheat and control hot working and the temperature of the hot-finishing operation to a finishing temperature range from 1550 to 1750 °F [845 to 945 °C] and cool in air or in a controlled atmosphere furnace from an initial temperature of not less than 1550 °F [845 °C]. Or treat as above-mentioned, and, at the discretion of the manufacturer, reheat to a suitable tempering temperature.
Seamless pipe of Grades 1, 6, and 10 may be heat treated by heating to a uniform temperature of not less than 1500 °F [815 °C], followed by quenching in liquid and reheating to a suitable tempering temperature.
ASTM A333 Grade 8 pipe shall be heat treated by the manufacturer by either of the following methods: quenched + tempered; double normalized + tempered. When required, Grade 11 shall be annealed and then normalized in the range of 1400 to 1600 °F [760 to 870 °C].
Size Chart of ASTM A333 Steel Pipe
Application of ASTM A333 Steel Pipe
- LNG Low-temperature pipeline
- low-temperature equipment
- Fire-tube boiler
- Water-tube boiler
- Shipbuilding
- Construction
- Chemical
- Petrochemical
- Food processing
- Oil and gas and other industrial applications
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