TORICH INTERNATIONAL LIMITED
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram |
| Supply Ability | 20000 Ton/Tons per Year |
| Delivery Time | 30-40 work days |
| Packaging Details | in wooden boxes or in hexagonal bundles |
| Name | GB/T 9808 Alloy Steel Grade Oil Drill Mineral Mining Seamless Steel Tubes |
| Technique | Cold Drawn |
| Surface | oiled |
| Usage | Oil Drill Mineral Mining |
| Material | ZT380,490,520,540,590,640,740 |
| OD | 6-420mm |
| WT | 0.5-50mm |
| Length | 4000-12500mm |
| Brand Name | Torich |
| Model Number | GB/T 9808 |
| Certification | ISO14001:2008, TS16949, CE PED, TUV, API,BV |
| Place of Origin | Zhejiang, China |
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Product Specification
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram | Supply Ability | 20000 Ton/Tons per Year |
| Delivery Time | 30-40 work days | Packaging Details | in wooden boxes or in hexagonal bundles |
| Name | GB/T 9808 Alloy Steel Grade Oil Drill Mineral Mining Seamless Steel Tubes | Technique | Cold Drawn |
| Surface | oiled | Usage | Oil Drill Mineral Mining |
| Material | ZT380,490,520,540,590,640,740 | OD | 6-420mm |
| WT | 0.5-50mm | Length | 4000-12500mm |
| Brand Name | Torich | Model Number | GB/T 9808 |
| Certification | ISO14001:2008, TS16949, CE PED, TUV, API,BV | Place of Origin | Zhejiang, China |
| High Light | oil drill pipe ，cold drawn steel pipe | ||
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, for Mining Exploration,for Wire Line Drill Rod, Casing Tube, Core Barrel Tubes, Couplings
Steel Grade: ZT380,ZT490,ZT520,ZT540,ZT590,ZT640,ZT740
Material: 37SiMn 38CrMoAl 30CrMnSi(A)
Heat treatment: Normalized, Q+T
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.
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 | ~ |
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 |
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 Picture:
Tag: Drill Steel Pipe
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller
Year Established:
1997
Total Annual:
25000000-30000000
Employee Number:
100~200
Ecer Certification：
Verified Supplier
Who We are ？ -------A professional steel pipes materials inventor, manufacturer and solution provider Torich International Limited is a professional manufacturer and exporter of steel pipes materials. It is an international marketing and sales company specialized in steel tubes, which hol... Who We are ？ -------A professional steel pipes materials inventor, manufacturer and solution provider Torich International Limited is a professional manufacturer and exporter of steel pipes materials. It is an international marketing and sales company specialized in steel tubes, which hol...
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