Our Private Processing Factories
Our Private Processing Factories
JOTAIN operates private processing factories dedicated to our own supply requirements.
These factories allow us to support overseas buyers with more than steel bar supply - from grade and delivery condition to heat treatment, peeling, grinding, inspection, packing and export-ready preparation.
Steel bars are the product. Reliable execution is the partnership.
Why Our Own Factories Matter
Buyers need control over the route, not only the steel grade.
For industrial steel bar orders, the risk is often in the details: delivery condition, processing sequence, surface preparation, dimensional requirements, inspection scope, documentation, packing, and lead-time coordination. JOTAIN's private processing facilities keep these decisions connected to the quotation and order review process.
Match grade, heat treatment, surface route, and downstream use before confirming supply.
Coordinate process steps, tolerances, inspection, and packing before production moves forward.
Support overseas requirements with product tags, document packages, packing checks, and loading planning.
Jiyuan Factory
Heat Treatment & Deep Processing
Located in the Jiyuan steel industrial base, this JOTAIN private processing factory focuses on metal material deep processing for bars, rods, shafts, fasteners, and related industrial applications.
Core processes
Quenching and temperingCenterless turning / peelingCenterless grindingChrome platingStraighteningCut-to-length sawingChamferingEddy current testing
Confirmed capacity and specification notes
- Heat treatment: 60,000 tons/year, approx. φ9-150mm, 3.5-16m, 6 PLC intelligent quenching and tempering lines.
- Peeling: large-scale annual capacity for continuous bright-bar preparation.
- Grinding: dedicated centerless grinding lines for surface and dimensional preparation.
- Chrome plating: 3,000 tons/year, approx. φ20-80mm, 3.5-9m.
Applications supported
Hydraulic cylinder rods, high-strength fasteners, pins and shafts, linear shafts, grinding rods, construction machinery, automotive steel, and general machinery.
| Process | Capability | Size range | Annual capacity |
|---|---|---|---|
| Heat treatment | Quenching and tempering | approx. φ9-150mm, 3.5-16m | 60,000 tons/year |
| Centerless turning / peeling | Bright bar preparation | Confirm by grade and RFQ | Large-scale continuous preparation |
| Centerless grinding | Surface and dimensional finishing | Confirm by grade and RFQ | Dedicated centerless grinding lines |
| Chrome plating | Piston rod / bright shaft surface | approx. φ20-80mm, 3.5-9m | 3,000 tons/year |
| Auxiliary finishing | Eddy current, chamfering, sawing, straightening | By process | Confirm per RFQ |
Huai'an Factory
Alloy Steel & Bright Bar Processing
The Huai'an processing base supports alloy structural steel bars, heat-treated products, and bright steel products for wind power bolts, rods, piston rods, wear-resistant bars, high-strength fastener materials, and other industrial steel bar products.
Grade examples
4140 / 42CrMo4SCM435 / SCM4404340-type alloy steels20MnCr541Cr4Bearing steelSpring steel
Product size ranges shown in brochure
- Heat-treated products: approx. φ25-220mm, length 3500-16000mm.
- Bright products: approx. φ25-60mm, length 3500-16000mm.
Delivery conditions
Hot rolledNormalizedQuenched and temperedCenterless turned / peeledStraightened / bright finishedChamferedCenterless ground
Core Processing Capabilities
Factory capability connects steel bar supply with the buyer's final use.
Quenching, tempering, normalizing, and condition control according to the order route.
Surface-defect removal and bright-bar preparation for downstream machining.
Dimensional and surface preparation for bars that require tighter finishing control.
Surface treatment support for piston rods, linear shafts, and selected rod applications.
Straightness preparation before inspection, cutting, grinding, or export packing.
Cut-length coordination according to buyer drawing, production route, and packing plan.
End preparation for safer handling and downstream processing requirements.
Process checks, dimensional review, product tags, and document support tied to the order.
Bundle, tag, protection, and loading preparation for overseas shipment requirements.
Quality Control
Inspection and document support are planned with the processing route.
Quality support should be agreed before quotation so the correct inspection scope, product tags, traceability, MTC, packing checks, and third-party inspection requirements can be coordinated.
Applications Supported
Processing routes for common industrial steel bar uses.
Hydraulic cylinder rods
Confirm grade, size, delivery condition, processing route, inspection, packing, and destination requirements during RFQ.
Shafts and pins
Confirm grade, size, delivery condition, processing route, inspection, packing, and destination requirements during RFQ.
High-strength fasteners
Confirm grade, size, delivery condition, processing route, inspection, packing, and destination requirements during RFQ.
Threaded rods / tie rods
Confirm grade, size, delivery condition, processing route, inspection, packing, and destination requirements during RFQ.
Grinding rods
Confirm grade, size, delivery condition, processing route, inspection, packing, and destination requirements during RFQ.
Automotive steel parts
Confirm grade, size, delivery condition, processing route, inspection, packing, and destination requirements during RFQ.
Construction machinery
Confirm grade, size, delivery condition, processing route, inspection, packing, and destination requirements during RFQ.
General machinery
Confirm grade, size, delivery condition, processing route, inspection, packing, and destination requirements during RFQ.
Factory Proof for RFQ Review
Use factory capability, processing route, inspection scope, packing, and documents to qualify the order path.
For current RFQs, JOTAIN can review process capability, grade route, size range, document scope, and export preparation before quotation.
RFQ
Send a Complete RFQ
To check availability and processing route, please send grade, diameter, length, quantity, delivery condition, surface or processing requirement, application, destination port and testing/certificate requirements.