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Alloy seamless steel pipe is a type of seamless steel pipe. Its performance is much higher than that of ordinary seamless steel pipes because this steel pipe contains more Cr. Its high temperature resistance, low temperature resistance and corrosion resistance are better than other seamless steel pipes. Incomparable, so alloy pipes are widely used in petroleum, chemical, electric power, boiler and other industries.
Good corrosion resistance: Alloy steel pipes have excellent corrosion resistance. The thin and strong oxide film on the surface of alloy steel pipes makes the corrosion control level of stainless steel exceed IP68 in all water qualities. It can ensure the cleanliness of water quality even if it is used underground.High mechanical strength: The yield strength of alloy steel pipes is more than twice that of ordinary low-carbon seamless pipes.Long service life: 304L is 3 times longer than ordinary carbon steel plates.Good wear resistance: its wear resistance is more than 7 times that of manganese steel.Resistant to high temperature oxidation. Not easy to scale.High gloss after internal and external polishing.Good welding performance. Can be recycled.| Alloy Steel | C | Cr | Mn | Mo | P | S | Si |
| 0.05 – 0.15 | 1.00 – 1.50 | 0.30 – 0.60 | 0.44 – 0.65 | 0.025 max | 0.025 max | 0.50 – 1.00 |
| Tensile Strength, MPa | Yield Strength, MPa | Elongation, % |
| 415 min | 205 min | 30 min |
| ASTM A450 | Hot rolled | Outside Diameter, mm | Tolerance, mm |
| OD≤101.6 | +0.4/-0.8 | ||
| 101.6＜OD≤190.5 | +0.4/-1.2 | ||
| 190.5＜OD≤228.6 | +0.4/-1.6 | ||
| Cold Drawn | Outside Diameter, mm | Tolerance, mm | |
| OD＜25.4 | ±0.10 | ||
| 25.4≤OD≤38.1 | ±0.15 | ||
| 38.1＜OD＜50.8 | ±0.20 | ||
| 50.8≤OD＜63.5 | ±0.25 | ||
| 63.5≤OD＜76.2 | ±0.30 | ||
| 76.2≤OD≤101.6 | ±0.38 | ||
| 101.6＜OD≤190.5 | +0.38/-0.64 | ||
| 190.5＜OD≤228.6 | +0.38/-1.14 | ||
| ASTM A530 & ASTM A335 | NPS | Outside Diameter, inch | Tolerance, mm |
| 1/8≤OD≤1-1/2 | ±0.40 | ||
| 1-1/2＜OD≤4 | ±0.79 | ||
| 4＜OD≤8 | +1.59/-0.79 | ||
| 8＜OD≤12 | +2.38/-0.79 | ||
| OD>12 | ±1% |
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