鋼管的內(nèi)徑及其允許偏差 |
鋼管的壁厚及其允許偏差 | ||||
外徑/mm |
壁厚/mm |
內(nèi)徑及其允許偏差/mm |
類別 |
壁厚/mm |
允許偏差/mm |
50
63.5 |
2.5
1.6 |
45士O.12
60.30±0.14 |
I |
1
<3.O |
+0.20
-0.10 |
63.5
68.9 |
2.5
2.3 |
58.50土O.14
64.30±0.20 |
>3.O~4.0 |
+O.25
-0.15 | |
76
89 |
2.5
2.5 |
7l±O.20
84±O.25 |
>4.O |
±O.25 | |
89
89 |
4.0
5.0 |
8l±O.25
79±0.30 |
Ⅱ |
1.6~3.6 |
土O.12 |
100
100 |
4.0
6.O |
92±0.30
88±0.35 |
Ⅲ |
牌號 |
化學(xué)成分(質(zhì)量分?jǐn)?shù))(%) | ||||||||
C |
Si |
Mn |
P |
S |
Ti |
Cr |
Ni |
Cu | |
08Z |
0.05~O.12 |
≤O.37 |
O.35~O.65 |
≤0.035 |
≤O.035 |
≤O.14 |
≤O.10 |
≤0.25 |
≤O.25 |
15TiZ |
O.12~0.19 |
0.30~O.60 |
0.35~0.65 |
≤O.035 |
≤O.035 |
0.12~0.22 |
≤0.25 |
≤0.25 |
≤O.25 |
20Z |
O.17~O.24 |
O.17~O.37 |
0.35~O.65 |
≤O.035 |
≤0.035 |
|
≤0.25 |
≤O.25 |
≤0.25 |
25Z |
0.20~0.27 |
O.17~O.37 |
O.40~O.70 |
≤O.035 |
≤O.035 |
|
≤O.25 |
≤O.25 |
≤O.25 |
類 別 |
牌 號 |
ób |
ó0.2 |
δ5(%)≥ |
適用范圍 |
MPa | |||||
I |
08Z |
440~570
≥490 |
≥295
≥350 |
15
15 |
130車型 |
Ⅱ |
15TiZ
20Z
25Z |
≥450
≥440
≥440 |
≥350
≥295
≥315 |
10
10
10 |
|
Ⅲ |
20Z |
460~590 |
≥350 |
1O |
|
|