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API5L/A106B Seamless Steel Tubes
Standard: ASTM A106/API 5L
Seamless carbon steel tubes for high-temperature service
● Application: for high temperature service.
● Size range: O.D.: 15-120mm W.T.: 1-15mm L.: 15000mm max.
Table 1: steel grade and chemical composition:
| Grade | C (max) | Mn | P (max) | S (max) | Si (min) | Cr (max) | Cu (max) | Mo (max) | N (max) | V (max) |
| A | 0.25 | 0.27-0.93 | 0.035 | 0.035 | 0.10 | 0.40 | 0.40 | 0.15 | 0.40 | 0.08 |
| B | 0.30 | 0.29-1.06 | 0.035 | 0.035 | 0.10 | 0.40 | 0.40 | 0.15 | 0.40 | 0.08 |
| C | 0.35 | 0.29-1.06 | 0.035 | 0.035 | 0.10 | 0.40 | 0.40 | 0.15 | 0.40 | 0.08 |
Table 2: Mechanical property:
| Grade | Tensile Strength Rm (Mpa) | Yield Point (Mpa) | Elongation A% | Delivery Condition |
| A | ≥330 | ≥205 | 20 | Annealed |
| B | ≥415 | ≥240 | 20 | Annealed |
| C | ≥485 | ≥275 | 20 | Annealed |
Table 3: Dimension Tolerances：
| Pipe Type | Pipe Sizes | Tolerances | |
| Cold Drawn | OD | ≤48.3mm | ±0.40mm |
| ≥60.3mm | ±1%mm | ||
| WT | ±12.5% | ||
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