牌号
|
化学成分(质量分数)(%)
|
C
|
Si
|
Mn
|
S
|
P
|
V
|
Cr
|
Mo
|
W
|
Nb
|
Cu
|
10
|
0.07~0.14
|
0.17~0.37
|
0.35~0.65
|
0.04
|
0.035
|
-
|
-
|
-
|
-
|
-
|
-
|
20G
|
0.17~0.24
|
0.17~0.37
|
0.35~0.65
|
0.035
|
0.035
|
-
|
-
|
-
|
-
|
-
|
-
|
16Mn
|
0.12~0.20
|
0.20~0.60
|
1.20~1.60
|
0.04
|
0.04
|
-
|
-
|
-
|
-
|
-
|
-
|
15MnV
|
0.12~0.18
|
0.20~0.60
|
1.20~1.60
|
0.04
|
0.04
|
0.04~0.12
|
-
|
-
|
-
|
-
|
-
|
10MoWVNb
|
0.07~0.13
|
0.50~0.80
|
0.50~0.80
|
0.03
|
0.04
|
0.30~0.50
|
-
|
0.60~0.90
|
0.50~0.90
|
0.06~0.12
|
≤0.25
|
12CrMo
|
0.08~0.15
|
0.17~0.37
|
0.40~0.70
|
0.04
|
0.035
|
-
|
0.40~0.70
|
0.40~0.55
|
-
|
-
|
-
|
15CrMo
|
0.12~0.18
|
0.17~0.37
|
0.40~0.70
|
0.04
|
0.035
|
-
|
0.80~1.10
|
0.40~0.55
|
-
|
-
|
-
|
1Cr5Mo
|
≤0.15
|
≤0.50
|
≤0.60
|
0.03
|
0.035
|
-
|
4.00~6.00
|
0.40~0.60
|
-
|
-
|
-
|
12Cr2Mo
|
0.08~0.15
|
0.40~0.70
|
≤0.50
|
0.035
|
0.035
|
-
|
2.00~2.50
|
0.90~1.20
|
-
|
-
|
-
|
力学性能
|
抗拉强度σb/ Mpa
|
屈服点σs /Mpa
|
伸长率δ5(%)
|
冲击韧度/ak/(J/CM2
|
≥
|
335~490
|
205
|
24
|
-
|
410~550
|
245
|
24
|
49
|
490~670
|
320
|
21
|
59
|
510~690
|
350
|
19
|
59
|
470~670
|
295
|
19
|
78
|
410~560
|
205
|
21
|
69
|
440~640
|
235
|
21
|
59
|
390~590
|
195
|
22
|
118
|
450~600
|
280
|
20
|
48
|
1.用12Cr2Mo钢制造的钢管,当外径不大于30mm,壁厚不大于3mm时,其屈服点允许降低10MPa。其他牌号当壁厚大于16~40mm时,屈服点允许降低10MPa
化肥设备用高压无缝钢管的允许偏差
|
钢管种类
|
钢管尺寸/mm
|
允许偏差
|
热轧(挤压)
|
外径
|
≤159
|
±1.0%
|
>159
|
±1.25%
|
壁厚
|
3~20
|
±12.5%
|
>20
|
±10%
|
冷拔(扎)
|
外径
|
10~30
|
±0.2mm
|
>30~50
|
±0.3mm
|
>50
|
±0.8%
|
壁厚
|
1.5~3
|
12
|
-10
|
>3
|
±10%
|
注:钢管的弯曲不得大于如下规定:
|
壁厚≤15mm…………….…1.5mm/m
|
|
壁厚>15~30 ………………2.0mm/m
|
|
壁厚>30mm…………………3.0mm/m
|
|
点击数:4095 录入时间:2012-09-29 11:32:58【打印此页】【返回】