ASTM A333 Alloy Seamless Steel Pipes
Outer Dimensions: 19.05mm~219.1mm
Wall Thickness: 2.0mm~15 mm
Length: Max 16000mm
1. ASTM A333 Chemical Composition Requirements
| Chemical Composition of ASTM A333 |
| 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.
2. ASTM A333 Mechanical Properties
| ASTM A333 |
Tensile Strength, min. |
Yield Strength, min. |
Elongation %, min. |
| 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.
3. Charpy V-notch Impact Tests
| Impact Requirements for Grades 1, 3, 4, 6, 7, 9, 10, and 11 |
| 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.
| Minimum Impact Test Temperature of ASTM A333 |
| 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.
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