EN109207-1 is a standard for alloy and non-alloy seamless round steel pipes. Steel grades covered by EN 109207-1 41Cr4, 25CrMo4, 30CrMo4, 34CrMo4, 42CrMo4, 36CrNiMo4, 30CrNiMo4, 41NiCrMo7-3-2 is a very common general medium carbon Cr-Mo steel grade.
OD: 26.9-610mm
WT: 2.3-100mm
Length: 3000-12000mm
Grade: 41Cr4, 25CrMo4, 30CrMo4, 34CrMo4, 42CrMo4, 36CrNiMo4, 30CrNiMo4, 41NiCrMo7-3-2 which are covered by EN 109207-1
Dimensional Tolerances Of EN 10297-1 Seamless Circular Steel Tubes
OD/Wall tolerance
| Execution | Size Range | OD Tolerance | Wall tolerance |
|---|---|---|---|
| Hot-rolled Tube | OD – 80 mmOD > 80 mmWall < 12 mmWall - 12 mm | ± 0.4 mm± 0.5 % of OD | ± 0.7 mm± (5 % x wallthickness + 0.1 mm |
| Hot-rolled peeled tube | All sizesWall < 12 mmWall - 12 mm | + 0.25/- 0 mm | ± 0.8 mm± (5 % x wall thickness+ 0.2 mm) |
| Cold Worked tubecold-rolled or cold-drawn | OD < 40 mmOD 40 - 80 mmOD > 80 Wall Thickness< 6 mm Wall Thickness6 - 8 mm Wall Thickness > 8 | + 0.30/- 0 mm*+ 0.35/- 0 mm*+ 0.40/- 0 mm* | ± 0.30 mm± 0.35 mm± 0.40 mm |
|
Steel Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
Cu |
||||||
|
Min. |
Max. |
Min. |
Max. |
Min. |
Max. |
Max. |
Max. |
Min. |
Max. |
Min. |
Max. |
Min. |
Max. |
Max. |
|
|
41Cr4 |
0.38 |
0.45 |
- |
0.40 |
0.60 |
0.90 |
0.035 |
0.035 |
0.90 |
1.20 |
- |
- |
- |
- |
- |
|
25CrMo4 |
0.22 |
0.29 |
- |
0.40 |
0.60 |
0.90 |
0.035 |
0.035 |
0.90 |
1.20 |
0.15 |
0.30 |
- |
- |
- |
|
30CrMo4 |
0.27 |
0.34 |
- |
0.35 |
0.35 |
0.60 |
0.035 |
0.035 |
0.80 |
1.15 |
0.15 |
0.30 |
- |
- |
- |
|
34CrMo4 |
0.30 |
0.37 |
- |
0.40 |
0.60 |
0.90 |
0.035 |
0.035 |
0.90 |
1.20 |
0.15 |
0.30 |
- |
- |
- |
|
42CrMo4 |
0.38 |
0.45 |
- |
0.40 |
0.60 |
0.90 |
0.035 |
0.035 |
0.90 |
1.20 |
0.15 |
0.30 |
- |
- |
- |
|
36CrNiMo4 |
0.32 |
0.40 |
- |
0.40 |
0.50 |
0.80 |
0.035 |
0.035 |
0.90 |
1.20 |
0.15 |
0.30 |
0.90 |
1.20 |
- |
|
30CrNiMo4 |
0.26 |
0.34 |
- |
0.40 |
0.30 |
0.30 |
0.035 |
0.035 |
1.8 |
2.20 |
0.30 |
0.50 |
1.80 |
2.20 |
- |
|
41NiCrMo7-3-2 |
0.38 |
0.44 |
- |
0.30 |
0.60 |
0.90 |
0.025 |
0.025 |
0.70 |
0.90 |
0.15 |
0.30 |
1.65 |
2.00 |
0.25 |
|
If there are enough other nitrogen adhesives, the minimum aluminium content is not applicable. The maximum total content of Nb and V is 0.20%. |
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