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external diameter:12~70mm
wall thickness:1~8mm
length:14000mm Maximum
chemical composition( %) | carbon | manganese | phosphorus≤ | sulfur≤ |
0.06~0.18 | 0.27~0.63 | 0.035 | 0.035 |
Mechanical properties | tensile strength(Mpa) | Yield strength(Mpa) | Elongation (%) | hardness |
≧325 | ≧180 | ≧35 | ≤72HRB |
Tolerance of outer diameter and wall thickness | |||||
external diameter Inch (mm) | + | - | wall thickness Inch(mm) | + | - |
﹤1(25.4) | 0.10 | 0.10 | ≦1 1/2(38.1) | 20% | 0 |
1~1 1/2(25.4~38.1) | 0.15 | 0.15 | ﹥1 1/2(38.1) | 22% | 0 |
1 1/2~2(38.1~50.8) | 0.20 | 0.20 |
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2~2 1/2(50.8~63.5) | 0.25 | 0.25 |
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