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EN 10297-1 Seamless Steel Tubes
EN 10297-1 seamless steel tubes Steel grade: E235, E275, E315, E355, E470 Delivery condition: Hot finished, Normalized rolled, Normalized Size range: OD 70mm-610mm, WT 4mm-35mm, according to EN 10297-1:2003 Dimension and tolerance: according to EN10297-1 Length: commercial length Test: Cast...
Description
EN 10297-1 seamless steel tubes
Steel grade: E235, E275, E315, E355, E470
Delivery condition: Hot finished, Normalized rolled, Normalized
Size range: OD 70mm-610mm, WT 4mm-35mm, according to EN 10297-1:2003
Dimension and tolerance: according to EN10297-1
Length: commercial length
Test: Cast analysis, tensile test, electromagnetic test, visual inspection
Certification: CPR(305/2011/EU)
Chemical composition
Steel grade | Elements content, % | ||||||||||||
| C | Si | Mn | P | S | Cr | Mo | Ni | Al | Cu | N | Nb | V | |
| E235 | ≤0.17 | ≤0.35 | ≤1.2 | ≤0.030 | ≤0.035 | - | - | - | - | - | - | - | - |
| E275 | ≤0.21 | ≤0.35 | ≤1.4 | ≤0.030 | ≤0.035 | - | - | - | - | - | - | - | - |
| E315 | ≤0.21 | ≤0.30 | ≤1.5 | ≤0.030 | ≤0.035 | - | - | - | - | - | - | - | - |
| E355 | ≤0.22 | ≤0.35 | ≤1.6 | ≤0.030 | ≤0.035 | - | - | - | - | - | - | - | - |
| E470 | 0.16- 0.22 | 0.10- 0.50 | 1.30-1.70 | ≤0.030 | ≤0.035 | - | - | - | - | ≥0.010 | ≤0.020 | ≤0.07 | 0.08- 0.15 |
Mechanical properties
Steel grade | Delivery condition | Yield strength Min (MPa) | Tensile strength Min (MPa) | Elongation A, % | |||||
| Wall thickness (mm) | Wall thickness (mm) | ||||||||
| ＜16 | 16＜T≤40 | 40＜T≤65 | ＜16 | 16＜T≤40 | 40＜T≤65 | Longitudinal direction | Transverse direction | ||
| E235 | +AR or +N | 235 | 225 | 215 | 360 | 360 | 360 | 25 | 23 |
| E275 | +AR or +N | 275 | 265 | 255 | 410 | 410 | 410 | 22 | 20 |
| E315 | +AR or +N | 315 | 305 | 295 | 450 | 450 | 450 | 21 | 19 |
| E355 | +AR or +N | 355 | 345 | 335 | 490 | 490 | 490 | 20 | 18 |
| E470 | +AR | 470 | 430 | -- | 650 | -- | -- | 17 | 15 |
Dimensional tolerances
Outer diameter D mm | Tolerance on D | Tolerance on T for T/D ratio | ||
| T/D≤0.025 | 0.025＜T/D≤0.05 | T/D＞0.05 | ||
| D≤219.1 | ±1% or 0.5mm Whichever is the greater | ±12.5% or ±0.4mm Whichever is the greater | ||
| D＞219.1 | ±1% | ±20% | ±15% | ±12.5% |
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