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Model No.: GB/T 9808
Brand: Torich
Type: Seamless
Certification: UL
Application: Drill Pipe
Section Shape: Round
Surface Treatment: Oiled
Usage: Oil Drill Mineral Mining
Technique: Cold Drawn
Material: ZT380,490,520,540,590,640,740
Place Of Origin: Zhejiang, China (Mainland)
Shape: Round
Thickness: 0.5 - 50 Mm
Name: GB/T 9808 Drilling Seamless Steel Tubes
Outer Diameter: 6 - 420 Mm
Length: 4000-12500mm
Packaging: packing in wooden boxes or hexagonal bundles with seaworthy packing
Productivity: 20000 Tons per Year
Transportation: Ocean,Land,Air
Place of Origin: Zhejiang, China (Mainland)
Supply Ability: 60000 Ton per year
Certificate: ISO9001:2008 ISO14001:2008, TS16949, CE PED, TUV, API
HS Code: 7304192000
Port: Shanghai,Ningbo,Wengzhou
Payment Type: L/C,T/T,D/P,Paypal,Money Gram,Western Union
Incoterm: FOB,CFR,CIF,FCA,CPT
Size range: O.D.:6-420mm W.T.:0.5-50mm L:4000-12500mm according to customers' actual application and production.
Application : For Geological Drill underground for Oil and Mineral,Mining Drilling Pipe for Mining Exploration,for Wire Line Drill Rod, Casing Tube, Core Barrel Tubes, Couplings,Oil Drill Pipe, Drilling Steel Pipes
Steel Grade: ZT380,ZT490,ZT520,ZT540,ZT590,ZT640,ZT740
Heat treatment: Normalized, Q+T
Material: 37SiMn 38CrMoAl 30CrMnSi(A)
Chemical Compositon
CHEMICAL COMPOSITION % max | |
P | S |
0.030 | 0.030 |
Bending Degree
Nominal Wall Thickness/mm Bending Degree/(mm/m) ≤15 ≤1.5 >15 ≤2.0
The bending degree of the wire-line drill rod is not larger than 1.0 mm per meter.
Internal Path Rod Test
Diameter of the Path Rod | Length of the Path Rod(mm) |
d-1.0 | 300 |
d=D(diameter of the tube)-2S(wall thickness of the tube) |
Testing items and sampling quantity for steel tube Serial number Testing item Sampling quantity 1 Chemical composition 1 sample from each furnace 2 Tensile test 1 sample from each batch 3 Ultrasonic examination All 4 Eddy current test All 5 Magnetic flux leakage test All Grade comparison table This standard JIS G 3465-2006 Related industry standard ZT380 - DZ240 ZT490 - DZ250 ZT520 STM-R780 - ZT540 - DZ255 ZT590 - DZ260 ZT640 - DZ265 ZT740 - DZ275
Tolerance
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 |
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 |
Product Categories : Drilling Steel Pipes
Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.