| Type: | Seamless |
|---|---|
| Technique: | Cold Drawn |
| Material: | Alloy Steel |
| Surface Treatment: | Varnish,Black Painting,Oild |
| Usage: | Pipeline Transport, Chemical Industry |
| Section Shape: | Round |
| Samples: |
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| Customization: |
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Audited Supplier ASTM A333 GRADE 1
ASTM A333 GRADE 3
ASTM A333 GRADE 4
ASTM A333 GRADE 6
ASTM A333 GRADE 7
ASTM A333 GRADE 8
ASTM A333 GRADE 9
ASTM A333 GRADE 10
ASTM A333 GRADE 11
All seamless and welded pipe shall be treated to control their microstructure by the following methods: Normalizing per A 333/A 333M-05 section 4.2.1.1; section 4.2.1.2 or section 4.2.1.3 Quenched and Tempered per A 333/A 333M - 05 section 4.2.2.1 Double Normalized and Tempered per A 333/A 333M - 05 section 4.2.2.2
| Element | Grade 1 | Grade 6 | Grade 3 | Grade 4 |
| Carbon, max | 0.30 | 0.30 | 0.19 | 0.12 |
| Manganese | 0.40-1.06 | 0.29-1.06 | 0.31-0.64 | 0.50-1.05 |
| Phosphorus, max | 0.025 | 0.025 | 0.025 | 0.025 |
| Sulphur, max | 0.025 | 0.025 | 0.025 | 0.025 |
| Silicon | -- | 0.10 min | 0.15-0.37 | 0.08-0.37 |
| Nickel | -- | 0.40 max | 3.18-3.82 | 0.47-0.98 |
| Chromium | -- | 0.30 max | -- | 0.44-1.01 |
| Copper | -- | 0.40 max | -- | 0.40-0.75 |
| Aluminum | -- | -- | -- | 0.04-0.30 |
| Vanadium, max | -- | 0.08 | -- | -- |
| Columbium, max | -- | 0.02 | -- | -- |
| Molybdenum, max | -- | 0.12 | -- | -- |
For each reduction of 0.01% carbon below 0.30%, an increase of 0.05% manganese above 1.06% would be permitted to a maximum of 1.35% manganese.
| Grade 1 | Grade 3 | Grade 4 | Grade 6 | |||||
| psi | MPa | psi | MPa | psi | MPa | psi | MPa | |
| Tensile strength Min | 55 000 | 380 | 68 000 | 450 | 60 000 | 415 | 60 000 | 415 |
| Yield strength Min | 30 000 | 205 | 35 000 | 240 | 35 000 | 240 | 35 000 | 240 |
| Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | |
| Elongation in 2 in or 50 mm (or 4D), min, % | ||||||||
| Basic minimum elongation for walls 5/16 in. [8mm] and over in thickness, strip tests, and for all small sizes tested in full section. | 35 | 25 | 30 | 20 | 30 | 16.5 | 30 | 16.5 |
| When standard round 2-in, or 50-mm gage length or proportionally smaller size test specimen with the gage length equal to 4D (4 times the diameter) is used | 28 | 20 | 22 | 14 | 22 | 12 | 22 | 12 |
| For strip tests, a deduction for each 1/32 in [0.8 mm] decrease in wall thickness below 5/16 in [8 mm] from the basic minimum elongation of the following percentage | 1.75 | 1.25 | 1.50 | 1.00 | 1.50 | 1.00 | 1.50 | 1.00 |
Elongation in 2 in or 50 mm, min, %
| Wall Thickness | Grade 1 | Grade 6 | |||
| in | mm | Longitudinal | Transverse | Longitudinal | Transverse |
| 5/16 (0.312) | 8 | 35 | 25 | 30 | 16 |
| 9/32 (0.281) | 7.2 | 33 | 24 | 28 | 15 |
| 1/4 (0.250) | 6.4 | 32 | 23 | 27 | 15 |
| 7/32 (0.219) | 5.6 | 30 | -- | 26 | -- |
| 3/16 (0.188) | 4.8 | 28 | -- | 24 | -- |
| 5/32 (0.156) | 4 | 26 | -- | 22 | -- |
| 1/8 (0.125) | 3.2 | 25 | -- | 21 | -- |
| 3/32 (0.094) | 2.4 | 23 | -- | 20 | -- |
| 1/16 (0.062) | 1.6 | 21 | -- | 18 | -- |
IMPACT REQUIREMENTS FOR GRADE 1 & 6
| Size of Specimen | Minimum Average Notched Bar Impact Value of Each Set of Three Specimen | Minimum Notched Bar Impact Value of One Specimen only a Set | ||
| 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 |
| Straight line interpolation for intermediate values is permitted. | ||||
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