EN 10297-1 Gas Cylinder Tube, 34CrMo4 Gas Cylinder Pipe
This standard applies to the manufacture of seamless steel tubes for gas cylinders and accumulator shell. GNEE steel mainly supplies 30CrMo4 gas bottle pipe, 34CrMo4, 42CrMo4 seamless steel pipe for high-pressure gas cylinder.
Grade: 30CrMo4, 34CrMo4, 42CrMo4
OD: 60 - 711mm
WT: 3 - 38mm
Length: 4 - 12m
Delivery Condition: Without heat treatment, Quenched + Tempered, Normalized + Tempered
Chemical composition (cast analysis) for tubes made from alloy special steels in % by mass
|
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. |
|
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 |
- |
- |
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 | A % | |||||||||||||
|
For T in mm |
For T in mm | For T in mm | |||||||||||||||
| ≤8 | >8 | >20 | >50 | ≤8 | >8 |
>20 |
>50 |
≤ 8 |
>8 | >20 | >50 | ||||||
|
≤20 |
≤50 |
≤80 |
≤20 |
≤50 |
≤80 |
≤20 | ≤50 | ≤80 | |||||||||
|
l |
t |
l |
t |
l |
t |
l | t | ||||||||||
|
30CrMo4 |
1.7216 |
750 |
630 |
520 |
480 |
950 |
850 |
750 |
700 |
12 |
10 |
13 |
11 |
14 |
12 |
15 |
13 |
|
34CrMo4 |
1.722 |
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 |
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