ST52 Seamless Steel Triangle Tube for Agricultural Shafts
ST52 Triangle Pipe Lemon Shape Alloy Seamless Steel Tube For Agricultural Shafts
Material
The ST52 triangle pipe is a seamless, high-strength structural steel tube characterized by its uniform “lemon” (triangular) cross-section. Manufactured through hot extrusion and precision cold drawing, it delivers excellent dimensional accuracy, smooth internal surfaces, and superior mechanical properties suitable for demanding agricultural shaft applications.
Specifications
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Shape: Equilateral triangular (“lemon”) cross-section
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Grade: ST52 (per EN 10210/10219)
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Production Method: Hot extrusion + cold drawing (seamless)
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Dimensions:
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Side length (a): 30 mm–100 mm (customizable)
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Wall thickness (t): 2 mm–8 mm
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Length: 3 m–12 m (standard)
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Surface Finish: Mill finish or optional black oxide coating
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Tolerance: ±0.2 mm on side length; ±0.15 mm on thickness
Chemical Composition
| Grade | C (max %) | Si (max %) | Mn (max %) | P (max %) | S (max %) | Standard |
|---|---|---|---|---|---|---|
| ST52 | 0.22 | 0.50 | 1.60 | 0.035 | 0.035 | EN 10210/10219 |
| S355JR | 0.22 | 0.55 | 1.60 | 0.035 | 0.035 | EN 10025-2 |
| Q345B | 0.20 | 0.50 | 1.70 | 0.045 | 0.045 | GB/T 1591 |
| A572 Grade 50 | 0.23 | 0.40 | 1.35 | 0.035 | 0.040 | ASTM A572/A572M |
| A106 Grade B | 0.29 | 0.45 | 1.06 | 0.025 | 0.015 | ASTM A106/A106M |
Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Standard |
|---|---|---|---|---|
| ST52 | ≥355 | 510–680 | ≥22 | EN 10210/10219 |
| S355JR | ≥355 | 470–630 | ≥20 | EN 10025-2 |
| Q345B | ≥345 | 470–630 | ≥20 | GB/T 1591 |
| A572 Grade 50 | ≥345 | 450–620 | ≥18 | ASTM A572/A572M |
| A106 Grade B | ≥240 | 415–550 | ≥30 | ASTM A106/A106M |
Key Features
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High Strength-to-Weight Ratio: Optimized alloy chemistry delivers excellent load-bearing capacity at reduced weight.
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Seamless Integrity: Manufactured without weld seams for uniform stress distribution and fatigue resistance.
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Dimensional Precision: Tight tolerances ensure consistent fit and alignment in shaft assemblies.
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Surface Quality: Smooth internal/external walls minimize wear on bearings and seals.
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Corrosion Resistance: Optional coatings or post-treatments extend service life in harsh agricultural environments.
Applicable Standards
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ASTM: ASTM A572/A572M, ASTM A106/A106M
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EN: EN 10210, EN 10219, EN 10025-2
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GOST: GOST 8732-78 (seamless tubes)
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JIS: JIS G3444 (carbon steel tubes)
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GB: GB/T 12771, GB/T 8162
Application Domains
Agricultural Machinery Shafts
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Tractor Drive Shafts: Transmit torque from engine to drivetrain via triangular spline fittings.
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Combine Harvester Shafts: Provide power take-off interfaces for header and threshing units.
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Plow Frame Connectors: Act as rigid couplings between plow beams and hydraulic actuators.
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Seeder Drive Shafts: Ensure precise, backlash-free rotation for seed metering assemblies.
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Rotary Tiller Shafts: Deliver robust torque to tillage tines in corrosive soil conditions.
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A: Yes, we could offer the sample for free charge but need pay the cost of freight.
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A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
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