What is the average lead time for delivery?

The average lead time is within 15 workdays regardless of the season.

Which steel grades are commonly used?

Common grades include ST52, SAE 1020, E355, 45#, and 20#.

What is the internal diameter tolerance?

Tolerances vary by grade, typically ranging from H7 to H10 depending on the size.

St52 Honed Tube for Hydraulic Cylinder 50mm ID High Precision Seamless Pipe

Name: St52 Honed Tube for Hydraulic Cylinder 50mm ID High Precision Seamless Pipe
Brand: Shandong Tongmao Special Steel Co., Ltd.
SKU: 2152782792

Shandong, ChinaShandong Tongmao Special Steel Co., Ltd.

US$700.00

5 Tons

Sample price:US$1.20/kg.Request sample

Product profile

Customization

Available

After-sales Service

Responsible for After-Sales Service

Warranty

6 Months

Model NO.

C20 CK45 Q355B Q355D E355/ST52 4140 st52 E355

Type

Seamless

Technique

Cold Drawn

Material

Carbon Steel

Surface Treatment

Galvanized

Usage

Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Chemical Industry, Construction & Decoration, Drill Pipe

Section Shape

Round

Transport Package

Bundling

Specification

Length 1-12m Thickness 1 - 60 mm(0.04-2.36in)

Trademark

non

Origin

Liaocheng

HS Code

73043119

Production Capacity

3000ton/Year

Key features

High Precision Dimensions: Extremely precise ID dimensions with smooth surface finish for reduced friction.

Wide Size Range: Metric sizes from 32mm to 600mm ID and available in imperial sizes.

Multiple Material Options: Carbon steel, stainless steel, and various grades like ST52, SAE 1020, and E355.

Superior Surface Finish: Smooth internal surface with roughness as low as 0.2-0.4 micrometers.

Customization Available: Customization from designs and various manufacturing methods available.

Diverse Applications: Suitable for hydraulic cylinders, pneumatic cylinders, oil/gas drilling, and construction.

ISO 9001 Certified: Manufacturing process certified under ISO9001:2015 management system.

Fast Lead Time: Average lead time within 15 workdays for both peak and off-peak seasons.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceManagement Certification

Shandong Tongmao Special Steel Co., Ltd.

Shandong, China

Business Type: Manufacturer/Factory, Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Designs CertifiedExport Year: 10 years CertifiedNearest Port: Qingdao PortAverage Response Time: ≤5.43h

AI-Powered supplier vetting

SummaryThe supplier is a limited-company trading company with eight employees and a product scope covering copper, aluminum, steel, brass, and stainless-steel products. It has self-operated import/export rights, eight years of export experience, and exports account for 71%–90% of total sales. Production information states annual capacity of 500,000 tons for steel pipe and 10,000 tons for copper pipe, with peak- and off-season lead times both within 15 working days. However, the supplier reports no overseas showrooms, agents, branches, or offline trade-show participation, and has no written complaint-handling, corrective-action, or supplier-service assessment procedures. Quality controls include quality assurance, but finished products are randomly inspected and checked by packing staff, with one quality inspector and no raw-material traceability. Innovation and formal R&D capabilities are limited: no new products were launched in the previous year, and no 3D design, ODM, SDK, or popular-brand OEM services are...

After-Sales capabilityThe supplier has no overseas showroom, overseas agent or branch, or offline trade-show participation. It also has no written corrective-and-preventive-action procedures, complaint-handling procedures, or effective supplier-service assessment records, although it accepts multiple quotation and payment terms and reports lead times within 15 working days.

R&D capabilityThe supplier reports no new products in the previous year and does not provide 3D software design, ODM, SDK, or popular-brand OEM services. Its stated R&D-related service is customization from samples, indicating limited innovation capability rather than a documented product-development program.

Production capacityThe supplier provides stated annual productivity of 500,000 tons for steel pipe and 10,000 tons for copper pipe, with peak- and off-season lead times both within 15 working days. It has export experience of eight years, self-operated import/export rights, and export sales of 71%–90%; however, quality inspection is limited to random inspection, packing-staff checks, one inspector, and no raw-material traceability.

Customization capabilityCustomization from samples is explicitly available in both the R&D/design-related and product-capability information. No broader 3D, ODM, SDK, or formal product-development capability is stated, so the confirmed capability is sample-based customization.