BS EN10297-1 Alloy Tube
| Alloy quality steel grades | E355K2,E460K2,E730K2 |
|---|---|
| Alloy special steel | 41Cr4,25CrMo4,30CrMo4,34CrMo4,42CrMo4,36CrNiMo4,30CrNiMo8,41NiCrMo7-3-2;6MnCr5,16MnCrS5… |
| OD | 26.9-610mm WT: 2.3-100mm L: 5.8M, 6M, 11.8M, 12M or any other specified length. |
| Application | Machining, General engineering, crane arm, Bushes, Cylinders Various, Conveyor Rolls,Nuts, Rings, etc |
Description
BS EN10297-1 Alloy Tube
EN 10297 part 1 specifies the technical delivery conditions for seamless circular tubes made of non-alloy and alloy steels for mechanical and general engineering purposes.
Alloy special steel:41Cr4,25CrMo4,30CrMo4,34CrMo4,42CrMo4
OD: 20-660mm WT: 2.3-100mm L: 5.8M, 6M, 11.8M, 12M or any other specified length.
Application: Machining, General engineering, crane arm, Bushes, Cylinders Various, Conveyor Rolls, Hollow Shafts, Hollow Parts and components, Nuts, Rings, etc
Chemical composition (cast analysis) for tubes made from alloy special steels in % by mass a
| Steel grade | C | Si | Mn | P | S | Cr | Mo | Ni | ||||||
| Steel name | Steel number | min. | max. | max. | min. | max. | max. | max. | min. | max. | min. | max. | min. | max. |
| 41Cr4 | 1.7035 | 0,38 | 0,45 | 0,40 | 0,60 | 0,90 | 0,035 | 0,035 | 0,90 | 1,20 | – | – | – | – |
| 25CrMo4 | 1.7218 | 0,22 | 0,29 | 0,40 | 0,60 | 0,90 | 0,035 | 0,035 | 0,90 | 1,20 | 0,15 | 0,30 | – | – |
| 30CrMo4 | 1.7216 | 0,27 | 0,34 | 0,35 | 0,35 | 0,60 | 0,035 | 0,035 | 0,80 | 1,15 | 0,15 | 0,30 | – | – |
| 34CrMo4 | 1.7220 | 0,30 | 0,37 | 0,40 | 0,60 | 0,90 | 0,035 | 0,035 | 0,90 | 1,20 | 0,15 | 0,30 | – | – |
| 42CrMo4 | 1.7225 | 0,38 | 0,45 | 0,40 | 0,60 | 0,90 | 0,035 | 0,035 | 0,90 | 1,20 | 0,15 | 0,30 | – | – |
| a See also 7.1. | ||||||||||||||
| b<0,25% Cu. | ||||||||||||||
Mechanical properties for tubes made of steels in accordance with Table 6 in delivery condition +QT:
| Steel grade | Minimum tensile properties | ||||||||||||||||
| Steel name | Steel number | Yield strength (ReH) MPa | Tensile strength ( Rm) MPa | Elongation A% | |||||||||||||
| For T in mm | For T in mm | For T in mm | |||||||||||||||
| T≤8 | 8＜T≤20 | 20＜T≤50 | 50＜T≤80 | T≤8 | 8＜T≤20 | 20＜T≤50 | 50＜T≤80 | T≤8 | 8＜T≤20 | 20＜T≤50 | 50＜T≤80 | ||||||
| l | t | l | t | l | t | l | t | ||||||||||
| 41Cr4 | 1.7035 | 800 | 660 | 560 | – | 1000 | 900 | 800 | – | 11 | 9 | 12 | 10 | 14 | 12 | – | – |
| 25CrMo4 | 1.7218 | 700 | 600 | 450 | 400 | 900 | 800 | 700 | 650 | 12 | 10 | 14 | 12 | 15 | 13 | 16 | 14 |
| 30CrMo4 | 1.7216 | 750 | 630 | 520 | 480 | 950 | 850 | 750 | 700 | 12 | 10 | 13 | 11 | 14 | 12 | 15 | 13 |
| 34CrMo4 | 1.7220 | 800 | 650 | 550 | 500 | 1000 | 900 | 800 | 750 | 11 | 9 | 12 | 10 | 14 | 12 | 15 | 13 |
| 42CrMo4 | 1.7225 | 900 | 750 | 650 | 550 | 1100 | 1000 | 900 | 800 | 10 | 8 | 11 | 9 | 12 | 10 | 13 | 11 |
| NOTE l = longitudinal, t = transverse. | |||||||||||||||||
Tolerances on outside diameter and on thickness:
Tolerances of Lengths:
when Length equals 6000mm, Tolerances 0/+10
when 6 000 < L =12 000, Tolerances 0/+15
when > 12 000,Tolerances 0/+ by agreement
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