Seamless Steel Tubes for Gas Cylinder
Standard
GB 18248 China National Standard Seamless Steel Tube for Gas Cylinder
Uses
For manufacturing gas cylinder
Chemical Composition (%)
Chemical Composition of Seamless Steel Tubes for Gas Cylinder
|
Standard |
Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
V |
Ni |
Cu |
|
GB 18248 |
37Mn |
0.34-0.40 |
0.10-0.30 |
1.35-1.75 |
≤0.02 |
≤0.02 |
<0.30 |
|
<0.25 |
|
≤0.3 |
≤0.2 |
|
30CrMo |
0.26-0.34 |
0.17-0.37 |
0.40-0.70 |
≤0.02 |
≤0.02 |
0.80-1.10 |
0.15-0.25 |
<0.25 |
|
≤0.3 |
≤0.2 |
|
34Mn2V |
0.30-0.37 |
0.17-0.37 |
1.40-1.75 |
≤0.02 |
≤0.02 |
<0.30 |
|
<0.30 |
|
≤0.3 |
≤0.2 |
|
35CrMo |
0.32-0.40 |
0.17-0.37 |
0.40-0.70 |
≤0.02 |
≤0.02 |
0.80-1.10 |
0.15-0.25 |
<0.30 |
|
≤0.3 |
≤0.2 |
|
34CrMo4 |
0.30-0.37 |
≤0.40 |
0.60-0.90 |
≤0.02 |
≤0.02 |
0.90-1.20 |
0.15-0.30 |
<0.30 |
|
≤0.3 |
≤0.2 |
|
30CrMnSiA |
0.28-0.34 |
0.90-1.20 |
0.80-1.10 |
≤0.02 |
≤0.02 |
0.80-1.10 |
≤0.10 |
<0.30 |
|
≤0.3 |
≤0.2 |
Mechanical Properties
Mechanical Properties of Seamless Steel Tubes for Gas Cylinder
|
Standard |
Grade |
Elongation |
Yield Strength |
Tensile Strength |
Impact Test, min |
|
% |
MPa |
MPa |
Temp. |
Impact |
|
|
Not less than |
℃ |
KV/J |
|
|
GB 18248 |
37Mn |
16 |
630 |
750 |
-50 |
27 |
|
|
30CrMo |
12 |
785 |
930 |
-50 |
27 |
|
|
34Mn2V |
16 |
530 |
745 |
-20 |
27 |
|
|
35CrMo |
12 |
835 |
980 |
-50 |
27 |
|
|
34CrMo4 |
12 |
835 |
980 |
-50 |
27 |
|
|
30CrMnSiA |
10 |
885 |
1080 |
RT. |
27 |
|
Note: Steel pipes with other steel grades can also be supplied through discussion.
