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GB/T 9808 Drilling Seamless Steel Tubes
| Model No. : | GB/T 9808 |
|---|---|
| Brand Name : | Torich |
| Type : | Seamless |
Ningbo, Zhejiang, China
- Дистрибьютороптовик
- Производитель
- Услуга
- Торговая компания
- OEM -сервис
- Поставщик золота
- Сертификация платформы
- Онлайн -выставка
- видео
Описание продукта
Product Item: Drilling Steel Pipes
Product Name: GB/T 9808 Alloy Steel Grade Oil Drill Mineral Mining Seamless Steel Tubes
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 |
Ningbo, Zhejiang, China
- Дистрибьютороптовик
- Производитель
- Услуга
- Торговая компания
- OEM -сервис
- Поставщик золота
- Сертификация платформы
- Онлайн -выставка
- видео
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