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

• Shape: Equilateral triangular (“lemon”) cross-section

• Grade: ST52 (per EN 10210/10219)

• Production Method: Hot extrusion + cold drawing (seamless)

• Dimensions:

  • Side length (a): 30 mm–100 mm (customizable)

  • Wall thickness (t): 2 mm–8 mm

  • Length: 3 m–12 m (standard)

• Surface Finish: Mill finish or optional black oxide coating

• Tolerance: ±0.2 mm on side length; ±0.15 mm on thickness

Chemical Composition

Mechanical Properties

Key Features

• High Strength-to-Weight Ratio: Optimized alloy chemistry delivers excellent load-bearing capacity at reduced weight.

• Seamless Integrity: Manufactured without weld seams for uniform stress distribution and fatigue resistance.

• Dimensional Precision: Tight tolerances ensure consistent fit and alignment in shaft assemblies.

• Surface Quality: Smooth internal/external walls minimize wear on bearings and seals.

• Corrosion Resistance: Optional coatings or post-treatments extend service life in harsh agricultural environments.

Applicable Standards

• ASTM: ASTM A572/A572M, ASTM A106/A106M

• EN: EN 10210, EN 10219, EN 10025-2

• GOST: GOST 8732-78 (seamless tubes)

• JIS: JIS G3444 (carbon steel tubes)

• GB: GB/T 12771, GB/T 8162

Application Domains

Agricultural Machinery Shafts

• Tractor Drive Shafts: Transmit torque from engine to drivetrain via triangular spline fittings.

• Combine Harvester Shafts: Provide power take-off interfaces for header and threshing units.

• Plow Frame Connectors: Act as rigid couplings between plow beams and hydraulic actuators.

• Seeder Drive Shafts: Ensure precise, backlash-free rotation for seed metering assemblies.

• Rotary Tiller Shafts: Deliver robust torque to tillage tines in corrosive soil conditions.

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.