Large Diameter Mechanical Drill Steel Pipe , Hot rolled / Cold Drawn Steel Pipe

Mining tubes with Alloy steel grade

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)/ XJY118-2010	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 Grade	Tensile Strength Mpa		Yield Point Mpa		Elongation %		Heat treatment
	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

Applications:For Geological Drill underground for Oil and mineral, for mining

Product Tags:

oil drill pipe

      

cold drawn steel pipe

      

Large Diameter Mechanical Drill Steel Pipe , Hot rolled / Cold Drawn Steel Pipe Images