Seamless Hot-rolled Steel Tubes for Hydraulic Pillar Service
Hydraulic prop pipe is based on high–quality carbon structural steel, and one or several alloy elements are appropriately added to improve the strength, toughness and hardenability of the steel.
Compared with high-quality carbon structural steel, it has good comprehensive mechanical properties.
Uses
For manufacturing cylinder and piston of hydraulic props for coal mine or other purposes
Standard
GB/T 17396 China National Standard, Hot-rolled Seamless Steel Tubes for Hydraulic Pillar Service
Product Size
Outer Diameter: 159-325mm
Wall Thickness: 4-30mm
Chemical Composition (%)
Chemical Composition of Seamless Hot-rolled Steel Tubes for Hydraulic Pillar Service
|
Standard |
Grade |
C |
Si |
Mn |
S |
Cr |
Ni |
Cu |
|
GB/T 17396 |
20 |
0.17-0.24 |
0.17-0.37 |
0.35-0.65 |
<0.015 |
<0.25 |
<0.25 |
<0.20 |
|
35 |
0.32-0.40 |
0.17-0.37 |
0.50-0.80 |
<0.025 |
<0.25 |
<0.25 |
<0.20 |
|
40 |
0.42-0.50 |
0.17-0.37 |
0.50-0.80 |
<0.025 |
<0.25 |
<0.25 |
<0.20 |
|
27SiMn |
0.24-0.32 |
1.10-1.40 |
1.10-1.40 |
<0.020 |
<0.25 |
<0.25 |
<0.25 |
|
30MnNbRe |
0.27-0.36 |
0.20-0.60 |
1.20-1.60 |
<0.035 |
<0.30
Nb 0.02-0.05 |
<0.030 |
<0.030
Re 0.02-0.04 |
Mechanical Properties
Mechanical Properties of Seamless Hot-rolled Steel Tubes for Hydraulic Pillar Service
|
Standard |
Grade |
Elongation
% |
Yield Strength
MPa, min |
Tensile Strength
MPa, min |
Impact
J, Min |
Hardness
HBW |
|
GB/T 17396 |
20 |
20 |
245 |
400 |
|
|
|
35 |
17 |
305 |
510 |
|
|
|
40 |
14 |
335 |
590 |
|
|
|
27SiMn |
12 |
835 |
980 |
39 |
217 |
|
30MnNbRe |
13 |
725 |
850 |
49 |
|
