GB/T 17396 Hot Rolled Seamless Steel Tubes For Hydraulic Pillar
Price:
800-1000 USD/Tons
MOQ:
1 Tons
Delivery Time:
20-30days upon products
Brand:
TORICH
Product Description
GB/T 17396 Hot-Rolled Seamless Steel Tubes for Hydraulic Pillar Service
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.
Specifications
| 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.
Main Characteristics
- Controlled dimensional accuracy for hydraulic barrels: OD tolerance is ±0.75%D, while wall-thickness tolerance can be specified as common grade or higher grade depending on wall thickness.
- Defined straightness for machining stability: straightness is limited to 1.3 mm/m, 1.5 mm/m or 2.0 mm/m depending on wall thickness, with full-length bend limited to 0.10% of tube length.
- Strength range suitable for hydraulic pillar loading: listed grades cover tensile strength from 510 MPa for Grade 35 up to 1,080 MPa for 30CrMnSi.
- Impact-tested alloy options: 27SiMn, 30CrMnSi, 30CrMo and 30MnNbRE have specified Charpy V-notch absorbed energy requirements from 39 J to 71 J, depending on grade.
- Non-destructive inspection can be specified: ultrasonic testing level U3, eddy-current testing level E3H or E3, and magnetic-flux leakage testing level F3 are referenced for tube inspection.
Our Advantages
- Grade compliance and traceability for purchasing teams
Professional buyers often need confirmation that the material follows the current GB/T 17396-2022 standard rather than the older 2009 edition. We align the quotation with the required standard number, product name, steel grade, quantity, dimensions, delivery condition and special requirements, then provide heat-number traceability with chemical and mechanical test records. - Dimensional control for cylinder-barrel machining
Hydraulic cylinder tube buyers focus on tight allowance, internal surface condition, wall-thickness consistency and straightness because these affect machining allowance, seal contact and service life. We quote OD, wall thickness, straightness, out-of-roundness and wall-thickness unevenness according to GB/T 17396-2022; ID machining, honing or SRB finishing can be supplied as downstream processing when the drawing requires a finished cylinder bore. - Risk control before shipment
Hidden defects such as cracks, folds, inclusions and internal discontinuities are critical for hydraulic pillar tubes. We support visual inspection, chemical analysis, tensile testing, hardness testing where applicable, impact testing for alloy grades, inclusion rating and optional NDT by ultrasonic, eddy-current or magnetic-flux leakage methods according to the referenced GB/T inspection standards.
Execution Standards
| 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.
Application Field
Coal mine hydraulic roof support cylinder barrel.
Chemical Composition
| 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 |
Mechanical Properties
| 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 | — |
TORICH Group, an one-stop service provider of raw materials engaged in raw material production, R&D and
trade, has 30+ years of experience in the market, exported to 56 +countries, and won good reputation and
credibility among domestic and foreign customers.
The company's production plant covers an area of over 10,000 square meters, with an annual production
capacity of 50,000 tons of materials and a comprehensive trading and warehousing capacity of 100,000 tons, which can satisfy customers' personalized needs for raw materials in terms of diversity and timeliness.
The group holds shares in more than ten domestic production entities, whose main products include
seamless steel pipes ( carbon steel and stainless steel), welded pipes ( carbon steel and stainless steel), pipe fittings ( carbon steel and stainless steel), titanium (titanium tubes, titanium rods, titanium cakes, titanium plates, etc.), aluminum (aluminum tubes, aluminum rods, aluminum die casting, aluminum casting, CNC machining), and CNC deep processing of metal materials such as tubes, rods, and casting parts.
Over the past 30 years, the company has been gradually developing new technologies and materials to meet
the growing needs of customers and various diversified needs, exporting to more than 56 countries and still
increasing the number of exporting countries, aiming to help customers to solve the demand for raw materials, and to facilitate one-stop purchasing for customers.
Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
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.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
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.
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Company
TORICH INTERNATIONAL LIMITED
Location
Suite 1604-3, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China
Contact Person
Richard SHEN