Drill Pipes for Oil and Mineral Mining

Instruction

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%D) +0.65 (-0.5%D) -0.35
		WT	≤10	（+15%S）  +0.45  (-10%S）  -0.35
			＞10	（+12.5%S, -10%S)
	Cold Drawn	OD		±0.50%D or ±0.20
		WT		±8%S or ±0.15
Q(N)/ T118-2010	Cold Drawn	OD	OD	±0.40%D or ±0.20
		WT	WT	±7%S or ±0.15

 

Normal Sizes:

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

Mechanical Properties:    

Stee Grade	Tensile Strength  Mpa min	Yield Strength  Mpa min	Elongation  %  min	HRC	Heat Treatment
T600	790	600	14	~	N
T750	850	750	14	26-31	QT
T850	950	850	14	28-33	QT

 

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:    

Steel	Tensile Strength Mpa	Yield Point Mpa	Elongation %	Heat treatment
Grade	min
ZT380	640	380	14	Normlized
ZT490	690	490	12	Normlized
ZT540	740	590	12	Normlized
ZT590	770	590	12	Normlized
ZT640	790	640	12	QT
ZT740	840	740	10	QT
T850	950	850	15	QT