20MnV6, alloy steel, EN 10297, EN 10297 C35E, EN 10297 E235, EN 10297 E355, EN 10297 Mechanical Tubes, Mechanical Tubes, Seamless tube, seamless tubes, steel pipes, steel tube, steel tubes
EN 10297 Seamless circular steel tubes for mechanical and general engineering purposes. Technical delivery conditions. Non-alloy and alloy steel tubes.
Standard: BS EN 10297-1:2003
Applications of EN10297:
Alloy and non-alloy steel pipes, with circular section for mechanical and engineering applications.
Process: Seamless
Tolerance and size range :
Outside diameter:
D<=219.1mm: +/-1%(Min+/-0.5mm)
D>219.1mm:+/-1%
Thickness:
D<=219.1mm:+/-12.5%(min +/-0.4mm)
D>219.1mm: itchanges according to the ratio thickness/ diameter
Tolerance on thickness related to t/CD:
<=0.025 | 0.025 | >0.050 |
+/- 20% | +/-15% | +/-12.5% |
Size range: According to DIN_EN_10220-2003 unless differently spcified by the customer
Straightness
D<33.7mm :not specified
D>=33.7mm :0.15% on the total length
Note:
D: Outside diameter
T: Nominal thickness (mm)
Out of proundness
Included in the outside diameter tolerance
Standard and Steel grade:
EN 10297 E235
EN 10297 E355
EN 10297 C35E
20MnV6
Certification: UNI EN10204.3.1
Chemical analysis [%] of EN 10297:
Steel grade | C | Si | Mn | P | S |
E235 | ≤0,17 | ≤0,35 | ≤1,20 | ≤0,040 | ≤0,045 |
E355 | ≤0,22 | ≤0,55 | ≤1,60 | ≤0,040 | ≤0,045 |
C35E | 0,32 – 0,39 | ≤0,40 | 0,50 – 0,80 | ≤0,035 | ≤0,035 |
20MnV6 | 0,16 – 0,22 | 0,10 – 0,50 | 1,30 – 1,70 | ≤0,035 | ≤0,040 |
Mechanical properties of EN 10297:
Steel grade | Supply condtion | ReH min [MPa] | Rm min [MPa] | A [%] |
T≤16 | 16 | T≤16 | 16 |
E235 | AR | 235 | 225 | 360 | 360 | 25 |
E355 | AR | 355 | 345 | 490 | 490 | 20 |
C35E | N | 300 | 280 | 520 | 500 | 17 |
20MnV6 | AR | 470 | 450 | 650 | 620 | 17 |
Condition on delivery:
Term | Symbol | Explanation |
Cold-finished/hard (cold-finished as-drawn) | BK | No heat treatment after the last cold-forming process. The tubes therefore have only low deformability. |
Cold-finished/soft (lightly cold-worked) | BKW | After the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits. |
Annealed | GBK | After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum. |
Normalized | NBK | The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum. |
Main Products: alloy pipe ,seamless tube ,Anti-corrosion steel pipe ,seamless pipes ,Ceramic Lined Pipe ,Ceramic tile lined pipe ,Bi metal clad pipe ,Ceramic sleeve lined Pipe ,Lateral pipe Wye
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