Industrial Steel Supply
Alloy steel round bars and processed bars for industrial procurement.
JOTAIN supplies high-strength round bars, semi-finished products, and mature application-oriented supply with hot rolled, forged, heat-treated, peeled, rough machined, and precision processed options depending on grade and project requirements.
- Flagship grade
- 42CrMo4 / 4140
- Main diameter range
- 20-400 mm
- Flexible delivery length
- 3-12 m
- Surface conditions matched to downstream machining and assembly needs.
- Black / Peeled / Machined
Manufacturing Routes
Products Overview
Core grades selected for strength, toughness, wear performance, and dependable downstream processing.
Main products include 42CrMo, 42CrMo4 / 4140, 40Cr, CK45 / 1045, 34CrNiMo6, 35CrMo, and 65Mn steel bars used in hydraulic applications, shaft applications, fasteners, grinding rods, and heavy-duty industrial components.
Flagship grade 42CrMo4 / ASTM 4140 High-strength alloy round bar for shafts, rods, flanges, and load-bearing mechanical components. GB equivalent grade 42CrMo GB equivalent of 42CrMo4 / 4140, widely used for high-strength shafts, rods, bolts, and heavy-duty mechanical parts. Alloy structural steel 40Cr Alloy structural steel for shafts, gears, bolts, and transmission components requiring balanced strength and machinability. Medium carbon steel CK45 / C45 / 1045 Medium carbon steel for cylinder rods, general shafts, and mechanical parts where machinability and processing flexibility are important. High toughness alloy steel 34CrNiMo6 High-toughness alloy steel for heavy-duty shafts, gear shafts, and demanding load-bearing industrial components. Cr-Mo pressure grade 35CrMo Cr-Mo alloy steel used in high-strength fasteners, shafts, pressure-related parts, and petroleum or industrial applications. Wear-oriented steel 65Mn High-carbon manganese steel commonly used for grinding rods and wear-related applications requiring hardness, toughness, and heat-treatment response.
Manufacturing Capability
Alloy Steel Bar Production Line
Facilities near Huangshi, Jiyuan, and Huai'an give us stronger control over heat treatment, processing, and delivery execution.
- Core steel grades
- 6
- Main diameter range
- 20-400 mm
- Flexible delivery length
- 3-12 m
- Export-oriented supply execution
- Export
- Featured grade
- 42CrMo4 / ASTM 4140 QT
- Surface conditions matched to downstream machining and assembly needs.
- Black / Peeled / Machined
Factory footprint
Facilities near Huangshi, Jiyuan, and Huai'an support heat treatment, processing, and delivery execution.
Processing routes
Heat treatment, peeling, straightening, centerless grinding, threading, and related preparation can be reviewed around downstream use.
Quality control
Chemical composition analysis, mechanical testing, ultrasonic testing, dimensional inspection, surface condition checks, and traceability support can be discussed before shipment.
Export preparation
Packing, documentation, shipment coordination, and supply communication are aligned around international industrial orders and project requirements.
Processing Footprint
Facilities near Huangshi, Jiyuan, and Huai'an give us stronger control over heat treatment, processing, and delivery execution.
- Huangshi
- Jiyuan
- Huai'an
Manufacturing Routes
Processing routes selected around delivery condition and downstream use.
- Heat treatment
- Normalized
- Annealed
- Peeling
- Straightening
- Centerless grinding
- Thread rolling
Quality Control
Quality control includes chemical composition analysis, mechanical testing, ultrasonic testing, dimensional inspection, surface condition verification, and third-party inspection support when required.
- Chemical composition analysis
- Material traceability support
- Mechanical property testing
- Dimensional inspection
- Surface condition checks
- Third-party inspection support
Applications
Steel bars for hydraulic rods, shafts, fasteners, grinding rods, wind, marine, and heavy machinery.
We support OEMs, machining partners, and project buyers who need steel supply matched to actual application, heat-treatment target, delivery condition, and downstream processing route.
Rod applications Hydraulic Rods & Cylinder Components Strength, straightness, surface quality, and machining consistency. 
Shaft applications Shaft Bars & Rotating Parts Strength, toughness, fatigue resistance, and stable delivery condition. Threaded parts Tension Bars, Tie Rods & Threaded Components High-strength round bars for load-bearing threaded parts. Wear service Grinding Rods & Wear Applications Material stability, hardness, toughness, and heat-treatment response. Fastener supply Fastener Bars & Bolt Materials Controlled strength, threadability, and downstream processing support. Heavy-duty use Wind Power, Marine & Heavy Machinery Load, fatigue, and delivery reliability for demanding applications. Buyer Questions
Quick qualification points before sending a requirement.
Which steel grades does JOTAIN supply?
Core grades include 42CrMo, 42CrMo4 / 4140, 40Cr, CK45 / 1045, 34CrNiMo6, 35CrMo, and 65Mn steel bars.
Which delivery conditions can be reviewed for a project?
Depending on project requirements, supply can include hot rolled, forged, heat-treated, peeled, rough machined, precision processed, QT, annealed, normalized, black, peeled, machined, thread-ready, and processed options.
What should buyers send for quotation review?
Send grade or equivalent standard, diameter, length, quantity, delivery condition, application, inspection requirements, destination, and any drawing or downstream processing requirement.
What quality checks can be discussed before shipment?
Quality control can include chemical composition analysis, mechanical testing, ultrasonic testing, dimensional inspection, surface condition verification, material traceability support, and third-party inspection support when required.
Which applications does JOTAIN support?
JOTAIN supports hydraulic rods, shaft bars, tension bars, grinding rods, fastener bars, and wind, marine, and heavy machinery applications.
Quote Preparation
Ready to review a steel bar requirement?
Send the practical details first. We will help match the right material, processing route, and supply level for your project.
- Grade or equivalent standard
- Diameter, length, and quantity
- Delivery condition and surface condition
- Application, inspection requirements, and destination