products

HOT PRODUCTS

  • Galvanized Square Tube
  • Carbon Steel Concentric Reducer
  • Galvanized steel pipe bend

News

Location : home > News

Drill Steel Pipe For Mineral Mining , Alloy Steel Grade Oil Drill Pipe

Posted on 2018/07/19

Specifications

Drill Pipes for Oil and Mineral Mining
Applications: For Geological Drill underground for Oil and Mineral, for Mining Exploration
Straightness, Concentricity, Mechanical Properties can meet the requirement of DCDMA (USA), BS4019 (UK), METRIC (SWEDEN)
Size range: O.D.:6-95mm W.T.:1-10mm L:max12000mm
Standard
Producton Method
Tube Size
Tolerance
GB/T 9808-2008
Hot rolled
OD
(+1.0%OD) +0.65 / (-0.5%OD) -0.35
WT≤10
WT>10
(+15%WT) +0.45 / (-10%WT) -0.35
(+12.5%WT, -10%WT)
Cold Drawn
OD
±0.50%OD or ±0.20
WT
±8%WT or ±0.15
Q(N)/ T118-2010
Cold Drawn
OD
±0.40%OD or ±0.20
WT
±7%WT or ±0.15
Designation
Outside Diameter (mm)
Inside Diameter (mm)
Min
Max
Min
Max
A Wireline
44.45
44.70
34.82
35.07
B Wireline
55.55
55.90
45.95
46.30
N Wireline
69.95
70.30
60.05
60.30
H Wireline
88.90
89.38
77.62
78.10
P Wireline
114.30
114.78
102.79
103.27
Chemical composition
Stee Grade
C
Si
Mn
P
max
S
max
Cu
max
Cr
Mo
B
T600
(45MnMoB)
0.43-0.48
0.17-0.37
1.05-1.35
0.02
0.015
0.20
~
0.20-0.25
0.001- 0.005
T750
(30CrMnSiA)
0.28-0.34
0.90-1.20
0.80-1.10
0.02
0.015
0.20
0.8-1.1
~
~
T850
4140
0.38-0.43
0.17-0.35
0.70-0.90
0.02
0.015
0.20
0.9-1.1
0.15-0.25
~
Mechanical Properties
Stee Grade
Tensile Strength
Mpa min
Yield Strength
Mpa min
Elongation
% min
HRC
Tensile Strength
Mpa min
T600
790
600
14
~
T750
850
750
14
26-31
QT
T850
950
850
14


how to contact us?

links

Cangzhou Datang Steel Pipe Co., Ltd All Right Resevered.