TORICH INTERNATIONAL LIMITED
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram |
| Supply Ability | 60000 Ton/Tons per Year |
| Delivery Time | 20-30days upon products |
| Packaging Details | In bundles or in wooden boxes. |
| Technique | Cold Drawn,Hot Rolled |
| Application | Hydraulic Pillar |
| Standard | ASTM,GB,DIN,API,BS |
| Alloy or not | Non-alloy,Is Alloy |
| Thickness | 2 - 120 mm |
| Section shape | rectangular/ square/ round |
| Surface treatment | customerized |
| Grade | 20#,45# |
| Special pipe | precision seamless pipe,precision seamless steel tube,cold drawn |
| Secondary or not | Non-secondary |
| Outer diameter(round) | 17 - 660 mm |
| Length | 1-12m/as customers' requests |
| Shape | Round/Square/Rectangular |
| Brand Name | TORICH |
| Model Number | GB/T 17396 |
| Certification | ISO9001, ISO14001, TS16949 |
| 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 | 60000 Ton/Tons per Year |
| Delivery Time | 20-30days upon products | Packaging Details | In bundles or in wooden boxes. |
| Technique | Cold Drawn,Hot Rolled | Application | Hydraulic Pillar |
| Standard | ASTM,GB,DIN,API,BS | Alloy or not | Non-alloy,Is Alloy |
| Thickness | 2 - 120 mm | Section shape | rectangular/ square/ round |
| Surface treatment | customerized | Grade | 20#,45# |
| Special pipe | precision seamless pipe,precision seamless steel tube,cold drawn | Secondary or not | Non-secondary |
| Outer diameter(round) | 17 - 660 mm | Length | 1-12m/as customers' requests |
| Shape | Round/Square/Rectangular | Brand Name | TORICH |
| Model Number | GB/T 17396 | Certification | ISO9001, ISO14001, TS16949 |
| Place of Origin | Zhejiang/China |
GB/T 17396-2022 is the current Chinese national standard for seamless hot-rolled steel tubes used in hydraulic pillar service, issued for tubes used in cylinders and pillars of coal-mine hydraulic support equipment. The standard replaced GB/T 17396-2009 and has been implemented since May 1, 2023.
| Item | Specification |
|---|---|
| Material | Hot-rolled seamless carbon steel and alloy steel tube |
| Standard | GB/T 17396-2022 |
| Grades | 35, 45, 27SiMn, 27SiMnRE, 30CrMnSi, 30CrMo, 30MnNbRE |
| Outside Diameter | Nominal OD according to GB/T 17395; other OD sizes may be supplied by agreement |
| Wall Thickness | Nominal wall thickness according to GB/T 17395; other wall thicknesses may be supplied by agreement |
| Length | Standard usual length: 3,000-12,000 mm; custom fixed or multiple lengths can be agreed, including 1-12 m project lengths |
| Tolerance Range | OD: ±0.75%D. WT: ±10%S for S≤20 mm; for S>20-35 mm, common grade ±10%S and higher grade ±9%S; for S>35 mm, common grade ±10%S and higher grade ±8%S |
| Straightness | S≤15 mm: ≤1.3 mm/m; 15<S≤30 mm: ≤1.5 mm/m; S>30 mm: ≤2.0 mm/m; full-length bend ≤0.10% of tube length |
| Surface Condition | Internal and external surfaces shall be free from cracks, folds, scabs, delamination and other defects harmful to use; defect removal is allowed only when the remaining actual dimension stays within the minimum allowable OD and wall thickness limits |
| Heat Treatment | Standard delivery is hot-rolled. Annealed or quenched-and-tempered delivery can be agreed. Alloy-grade test samples are heat-treated according to the grade-specific requirements in GB/T 17396-2022 |
D = nominal outside diameter; S = nominal wall thickness.
| Region | Applicable Standard | Short Description |
|---|---|---|
| GB | GB/T 17396-2022 | Seamless hot-rolled steel tubes for hydraulic pillar service |
| ASTM | ASTM A519/A519M | Seamless carbon and alloy steel mechanical tubing, hot-finished or cold-finished |
| EN | EN 10297-1 / EN 10305-1 | EN 10297-1 for seamless circular tubes for mechanical engineering; EN 10305-1 for seamless cold-drawn precision tubes |
| GOST | GOST 8732 / GOST 8731 | Seamless hot-deformed steel pipes by OD, wall thickness and length; technical requirements to be confirmed by material group |
| JIS | JIS G 3445 | Carbon steel tubes for machine structural purposes |
These standards are not automatically interchangeable; grade equivalence, chemistry, mechanical properties and inspection scope should be confirmed against the purchase drawing.
Coal mine hydraulic roof support cylinder barrel.
| Grade | C | Si | Mn | Cr | Ni | Mo | Cu | Nb | RE | P | S |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 35 | 0.32-0.39 | 0.17-0.37 | 0.50-0.80 | ≤0.25 | ≤0.25 | — | ≤0.20 | — | — | ≤0.025 | ≤0.015 |
| 45 | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | ≤0.25 | ≤0.25 | — | ≤0.20 | — | — | ≤0.025 | ≤0.015 |
| 27SiMn | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | ≤0.30 | ≤0.30 | ≤0.10 | ≤0.20 | — | — | ≤0.025 | ≤0.015 |
| 30CrMnSi | 0.28-0.34 | 0.90-1.20 | 0.80-1.10 | 0.80-1.10 | ≤0.30 | ≤0.10 | ≤0.20 | — | — | ≤0.025 | ≤0.015 |
| 30MnNbRE | 0.27-0.36 | 0.20-0.60 | 1.20-1.60 | ≤0.30 | ≤0.30 | ≤0.10 | ≤0.20 | 0.020-0.050 | 0.008-0.025 | ≤0.025 | ≤0.015 |
| Grade | Sample Heat Treatment | Tensile Strength Rm, MPa | Yield / Proof Strength, MPa | Elongation A, % | Impact KV2, J | HBW Max, Annealed Condition |
|---|---|---|---|---|---|---|
| 35 | Delivery condition | ≥510 | ≥305 for S≤16 mm; ≥295 for 16<S≤30 mm; ≥285 for S>30 mm | ≥17 | — | — |
| 45 | Delivery condition | ≥590 | ≥335 for S≤16 mm; ≥325 for 16<S≤30 mm; ≥315 for S>30 mm | ≥14 | — | — |
| 27SiMn | Quench 920±15°C, water; temper 450±50°C, water or oil | ≥980 | ≥835 | ≥12 | ≥39 | ≤217 |
| 30CrMnSi | Quench 880±15°C, oil; temper 540±50°C, water or oil | ≥1,080 | ≥835 | ≥10 | ≥39 | ≤229 |
| 30MnNbRE | Quench 880±15°C, water; temper 450±50°C, air | ≥850 | ≥720 | ≥13 | ≥48 | — |
A: manufacturer,also can do trading.
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Trading Company,Seller
Year Established:
1997
Total Annual:
10million-15million
Employee Number:
100~150
Ecer Certification：
Verified Supplier
Who We are ？ TORICH is an enterprise that has been producing precision steel pipes and steel pipe processing for over 20 years, with a factory area of approximately 20000 square meters The main products produced are carbon steel and alloy steel grade seamless steel pipes, we... Who We are ？ TORICH is an enterprise that has been producing precision steel pipes and steel pipe processing for over 20 years, with a factory area of approximately 20000 square meters The main products produced are carbon steel and alloy steel grade seamless steel pipes, we...
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