詳細說明
Product Name
Material
Standard
Specification
Application
Oil cracking tube
10 #20#
12CrMo
1Cr5Mo
1Cr19Ni11Nb
15CrMo
GB9948-2006
∮8-630*1-60
Apply to oil refinery furnace tube and heat exchanger
Steel grade
Chemical composition (%)
C
Si
Mn
Ni
Cr
Mo
P.S
GB9948
10
0.17 ~ 0.14
0.17 ~ 0.37
0.35 ~ 0.65
≤ 0.25
≤ 0.15
/
≤ 0.035
20
0.17 ~ 0.24
0.08 ~ 0.15
0.40 ~ 0.70
≤ 0.30
0.40 ~ 0.55
0.12 ~ 0.18
0.40~ 0.70
0.80 ~ 1.10
Mechanical property
Tensile strength (MPa)
Yield strength (MPa)
Elongation(%)
330 ~ 490
≥ 205
≥ 24
410 ~ 550
≥ 245
≥ 21
410 ~ 560
440 ~ 640
≥ 235
Dimension tolerance:
Classificationcode
Manufacturing methods
Nominal dimension
tolerance
Common grade
Senior grade
WH
Hot rolled (extruded) steel pipe
OD(D)
≤50
+0.50
+0.30
>50~159
+1%D
+0.75%D
>159
+0.9%D
TH(S)
>20
+12.5%S-10%S
+10%S
Hot expanded steel pipe
All size
+15%S
WC
Cold drawn (rolled) steel pipe
14~30
+0.20
>30~50
>50
>3.0
+7.5%S
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